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1) Polar CAMMICE 3-Min Fluxes maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/CAMMICE/Fluxes/PT204S
Start:1996-03-18 00:00:00 Observatory:POLAR Cadence:204 seconds
Stop:2000-03-16 00:00:00 Instrument:Charge and Mass Magnetospheric Ion Composition Experiment (CAMMICE) Resource:NumericalData
Polar CAMMICE H, He, O fluxes in several energy channels, ~1-200 keV/q

2) Polar CAMMICE 3-Min Key Parameters maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/CAMMICE/KeyParameters/PT204S
Start:1996-02-26 00:00:00 Observatory:POLAR Cadence:204 seconds
Stop:2008-04-16 00:00:00 Instrument:Charge and Mass Magnetospheric Ion Composition Experiment (CAMMICE) Resource:NumericalData
Polar CAMMICE (Charge and Mass Magnetospheric Ion Composition) Key Parameters, H, He, O Count Rates

3) Polar CEPPAD Key Parameters, 100-sec Count Rates maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/CEPPAD/PT100S
Start:1996-02-26 00:00:00 Observatory:POLAR Cadence:100 seconds
Stop:2008-04-16 00:00:00 Instrument:Comprehensive Energetic-Particle Pitch-Angle Distribution (CEPPAD) Resource:NumericalData
Polar CEPPAD (Comprehensive Energetic Particle Pitch Angle Detector) key parameters, directional and spin-integrated count rates.

4) Polar EFI 6-sec Electric Field in Despun Spacecraft Coordinates maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/EFI/Despun/PT6S
Start:1996-03-16 00:00:00 Observatory:POLAR Cadence:6 seconds
Stop:2008-04-12 00:00:00 Instrument:Electric Fields Investigation (EFI) Resource:NumericalData
This set of data from the Polar EFI (Electric Field Instrument) contains two electric field components on the spin plane in despun spacecraft coordinates at 6-sec intervals.

5) Polar EFI 6-sec Key Parameters maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/EFI/KeyParameters/PT6S
Start:1996-03-15 00:00:00 Observatory:POLAR Cadence:6 seconds
Stop:2008-04-16 00:00:00 Instrument:Electric Fields Investigation (EFI) Resource:NumericalData
Polar EFI (Electric Field Instrument) key parameters, 6-sec field components and spectral densities at 3 frequencies

6) Polar EFI 6-sec Potential and Inferred Plasma Density maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/EFI/Potential/PT6S
Start:1996-03-16 00:00:00 Observatory:POLAR Cadence:6 seconds
Stop:2008-04-12 00:00:00 Instrument:Electric Fields Investigation (EFI) Resource:NumericalData
This set of data from the Polar EFI (Electric Field Instrument) contains the floating potential of the spacecraft over the range of about +1 to +90 volts. It also contains inferred plasma density that is obtained as a function of the spacecraft potential. The function is a power function, provided by Dr. Jack Scudder (University of Iowa). It comes from a fit to the POLAR Hydra particle data. The function was determined using data for 2001/04/01.

7) Polar Platform Attitude Definitive Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/Ephemeris/Attitude/PT24H
Start:1996-03-08 00:00:00 Observatory:POLAR Cadence:24 hours
Stop:2008-06-14 23:50:00 Instrument:POLAR Orbit Resource:NumericalData
Polar platform attitude definitive data include: orbital, GCI, GSE and GSM angles.

8) Polar Attitude Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/Ephemeris/Attitude/PT60S
Start:1996-03-08 00:00:00 Observatory:POLAR Cadence:60 seconds
Stop:2008-06-14 23:50:00 Instrument:POLAR Orbit Resource:NumericalData
Polar Attitude data, 1-min GSE and GSM (originally "predicted," but so good that generation of "definitive" data were dropped)

9) Polar Spin Phase Key Parameter Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/Ephemeris/KeyParameters/PT24H
Start:1996-03-08 00:00:00 Observatory:POLAR Cadence:24 hours
Stop:2008-06-14 23:50:00 Instrument:POLAR Orbit Resource:NumericalData
Polar spin phase angle and spin rate.

10) POLAR Predicted Orbit maxmize
Resource ID:spase://VMO/NumericalData/POLAR/Ephemeris/PT01M
Start:1996-02-27 00:00:00 Observatory:POLAR Cadence:01 minutes
Stop:2016-09-14 07:58:20 Instrument:POLAR Orbit Resource:NumericalData
Polar predicted orbit data

11) Polar 3-min Position Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/Ephemeris/PT3M
Start:1996-03-01 00:00:00 Observatory:POLAR Cadence:3 minutes
Stop:2009-06-27 00:00:00 Instrument:POLAR Orbit Resource:NumericalData
Polar satellite position and magnetic field model information.

12) Polar Orbit Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/Ephemeris/PT60S
Start:1996-02-27 00:00:00 Observatory:POLAR Cadence:60 seconds
Stop:2008-04-16 00:00:00 Instrument:POLAR Orbit Resource:NumericalData
Polar orbit data, 1-min GSE and GSM (originally "predicted," but so good that generation of "definitive" data were dropped)

13) Polar Daily Survey Plots maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/GWS
Start:1996-02-25 00:00:00 Observatory:POLAR Cadence:
Stop:2008-04-28 00:00:00 Instrument:Charge and Mass Magnetospheric Ion Composition Experiment (CAMMICE) Resource:DisplayData
Daily gif_walk plots, selected data from most Polar instruments

14) Polar HYDRA 13.8 sec Ion and Electron Fluxes maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/HYDRA/PT13.8S
Start:1996-04-01 00:00:00 Observatory:POLAR Cadence:13.8 seconds
Stop:2008-04-16 00:00:00 Instrument:Hot Plasma Analyzer (Hydra) Resource:NumericalData
Polar HYDRA 13.8 sec ion and electron fluxes, 12.5 eV - 18.3 keV, 29 energy channels

15) Polar HYDRA 55-s Key Parameters maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/HYDRA/PT55S
Start:1996-03-20 00:00:00 Observatory:POLAR Cadence:55 seconds
Stop:2008-04-16 00:00:00 Instrument:Hot Plasma Analyzer (Hydra) Resource:NumericalData
Polar HYDRA 55-s key parameters, electron densities and average energies

16) Polar MFE Magnetic Field Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/MFE/PT0.125S
Start:1996-03-20 00:00:00 Observatory:POLAR Cadence:0.125 seconds
Stop:2008-04-16 00:00:00 Instrument:POLAR Magnetic Fields Experiment (MFE) Resource:NumericalData
Polar MFE magnetic field plots and ASCII lists at 0.125, 6 and 55 sec resolutions. 0.125-s data are in spacecraft coordinates only, the 6-s and 55-s data are in these plus geophysical coordinates (e.g., GSE, GSM).

17) POLAR Magnetic Field KP maxmize
Resource ID:spase://VMO/NumericalData/POLAR/MFE/PT06S
Start:1996-03-16 00:00:55 Observatory:POLAR Cadence:06 seconds
Stop:2006-05-31 23:59:48 Instrument:POLAR Magnetic Fields Experiment (MFE) Resource:NumericalData
POLAR Magnetic Field Experiment (MFE) data; 0.92 minute and 6 second averages.

18) Polar Magnetic Field Key Parameters maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/MFE/PT55S
Start:1996-03-16 00:00:00 Observatory:POLAR Cadence:55 seconds
Stop:2008-04-16 00:00:00 Instrument:POLAR Magnetic Fields Experiment (MFE) Resource:NumericalData
Polar Magnetic Field,Key Parameters, 55-sec data in GSE, GSM, SM coordinates

19) Polar PIXIE Auroral X-ray Plots and Movies, CDAWeb maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/PIXIE/CDAWEB
Start:1996-03-19 00:00:00 Observatory:POLAR Cadence:
Stop:2002-11-09 00:00:00 Instrument:Polar Ionospheric X-ray Imaging Experiment (PIXIE) Resource:DisplayData
Polar PIXIE Auroral X-Ray Plots and Movies, CDAWeb

20) Polar PIXIE Auroral X-ray Plots and Movies maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/PIXIE/PT10M
Start:1996-03-19 00:00:00 Observatory:POLAR Cadence:10 minutes
Stop:2002-11-09 00:00:00 Instrument:Polar Ionospheric X-ray Imaging Experiment (PIXIE) Resource:DisplayData
Polar PIXIE Auroral X-Ray Plots and Movies

21) Polar PIXIE Level 1 Data Archive maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/PIXIE/PT60.00S
Start:1996-03-15 00:00:00 Observatory:POLAR Cadence:60.00 seconds
Stop:2003-12-29 00:00:00 Instrument:Polar Ionospheric X-ray Imaging Experiment (PIXIE) Resource:NumericalData
Polar PIXIE Level 1 Auroral X-ray Data Archive in CDF Format

22) Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 25kHz bandwidth interferometry fields maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/HFWR.25kHz.Interferometry.PT0.000014S
Start:1996-04-04 15:00:00 Observatory:POLAR Cadence:0.000014 seconds
Stop:1997-09-14 19:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
PWI>Plasma Wave Instrument Reference: Gurnett, D.A. et al, The Polar Plasma Wave Instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995. donald-gurnett@uiowa.edu An FFT on 1024 values was used in calibrating the data; i.e., perform FFT, calibrate in frequency domain, perform inverse FFT to get calibrated time series. Coordinate system used: antenna coordinate system, where the u-axis is offset by -45 degrees from the spacecraft x-axis, the v-axis is offset by -45 degrees from the spacecraft y-axis, and the z-axis is identical to the spacecraft z-axis. Effective bandwidth is 1.5*delta_f, where delta_f depends on the size of the FFT used to convert to the frequency domain, and delta_t. These data come in snapshots of 190902 points distributed among 2 to 6 channels every 9.2 seconds, where the duration of the snapshot is 0.045 seconds. Since Epoch time is in milliseconds, the times for the data points will not be unique unless the Delta_T in milliseconds is added to the Epoch time for the snapshot. The unattenuated frequency range for this file type is 20Hz to 25000Hz. The cadence value given here is computed from the inverse of the sampling rate (71.43 kHz). For a description of the PWI receivers and the different operational modes see: http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html

23) Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 25kHz bandwidth, 6-channel fields maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/HFWR.25kHz.PT0.000014S
Start:1996-03-26 15:00:00 Observatory:POLAR Cadence:0.000014 seconds
Stop:1997-09-16 17:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
PWI>Plasma Wave Instrument Reference: Gurnett, D.A. et al, The Polar Plasma Wave Instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995. donald-gurnett@uiowa.edu An FFT on 1024 values was used in calibrating the data; i.e., perform FFT, calibrate in frequency domain, perform inverse FFT to get calibrated time series. Coordinate system used: local magnetic field-aligned, a spacecraft centered coordinate system where Z is parallel to the local B-field determined from Polar MFE, X points outward and lies in the plane defined by the Z-axis and the radial vector from the earth to the spacecraft, and Y completes a right-handed system and points eastward. The X- and Z-axes are contained in the north-south plane. Effective bandwidth is 1.5*delta_f, where delta_f depends on the size of the FFT used to convert to the frequency domain, and delta_t. These data come in snapshots of 31816 points per channel, every 9.2 seconds, where the duration of each snapshot is 0.045 seconds. The time for individual samples is the epoch time of the snapshot incremented by delta_t in milliseconds for each successive sample. That is: sample_time = epoch_time + sample_offset * delta_t The data in this file will be in sets of 31744 (31*1024) points per channel because the FFT size does not come out even within the number of points per snapshot. To obtain the time for each point in the snapshot, increment each Epoch time after the first with Delta_T (in ms). The unattenuated frequency range for this file type is 20Hz to 25000Hz. The cadence value given here is computed from the inverse of the sampling rate (71.43 kHz). For a description of the PWI receivers and the different operational modes see: http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html

24) Polar PWI Key Parameters maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/PWI/KeyParameters/PT300S
Start:1996-02-27 12:20:27 Observatory:POLAR Cadence:300 seconds
Stop:1997-09-16 16:51:41 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
This set of key parameters comes from the Polar Plasma Wave Instrument. The data set contains the observed electron, proton, and oxygen cyclotron frequencies, plus the average and peak electric and magnetic fields in 160 frequencies from the two swept frequency receivers (SFRs), at 5-minute resolution. Additional related mode and antenna information is also given, plus spacecraft position in magnetic coordinates, and the variables Epoch (Time standard for CDF) and Time_PB5 (Time standard for ISTP data). The electron, ion and cyclotron frequencies are derived from the following: Fce = 0.028 kHz*B, where B is the magnitude of the ambient magnetic field measured in nT. Fcp = Fce/1837 in kHz. FcO+ = Fcp/16 in kHz. All frequencies in the Key parameters are converted to Hz. Since the SFR frequency steps vary with the mode, the measured SFR frequencies will be mapped to a fixed array of 160 approximately logarithmically spaced frequency values, 32 frequency values for each of the five SFR channels. In the log mode, the 64 frequency steps of the fourth and fifth frequency channels will be mapped to 32 frequency steps each, using geometric averaging. In the linear mode, the 448 linearly spaced frequency steps of the five frequency channels will be mapped to the fixed array of 160 logarithmically spaced frequency values using a windowing technique. The magnetic and electric field values corresponding to each SFR frequency step will be similarly mapped to 160-point fixed arrays corresponding to the mapped frequency array.

25) Polar Plasma Wave Instrument, Low Frequency Waveform Receiver, ~0.01 sec resolution fields maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/LFWR.PT0.01S
Start:1996-03-25 00:00:16 Observatory:POLAR Cadence:0.01 seconds
Stop:1997-09-16 16:52:55 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
The Low-Frequency Waveform Receiver (LFWR) is designed to provide an extension of the High Frequency Waveform Receiver into the frequency range below 25 Hz. The LFWR consists of six parallel low-pass filters connected to the three orthogonal electric field sensors and to the triaxial search coils. The input signals are band limited to a frequency range from 0.1 to 25 Hz and are sam- pled by a 12-bit analog-to-digital converter. The six LFWR channels are sampled simultaneously at a rate of 100 samples s-1. The dynamic range of the LFWRis approximately 72 dB with fixed gain. An FFT on 256 or 464 values, depending on the snapshot size, was used in calibrating the data; i.e., perform FFT, calibrate andin frequency domain, perform inverse FFT to get calibrated time series. Coordinate System Used: local magnetic field-aligned, a spacecraft centered coordinate system where Z is parallel to the local B-field determined from Polar MFE, X points outward and lies in the plane defined by the Z-axis and the radial vector from the earth to the spacecraft, and Y completes a right-handed system and points eastward. The X- and Z-axes are contained in the north-south plane. The three orthogonal magnetic field components are given in units of nT/Sec rather than nT because the response of the searchcoils across the passband is not flat. In order to obtain units of nT, the data would need to be digitally filtered to the frequency of interest and then integrated over time. Integrating over the entire passband could possibly destroy the resolution of the higher frequency components since the low frequency noise, if present, will dominate. Data are bandpass filtered. The valid range of data in the frequency domain is from 0.5 to 22.5 Hz. Reference:..Gurnett, D.A. et al, The Polar plasma wave instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995.

26) Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 16 kHz, Time Domain Fields. maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/LHFWR.16kHz.Interferometry.PT0.000028S
Start:1996-03-25 00:00:00 Observatory:POLAR Cadence:0.000028 seconds
Stop:1997-09-15 00:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
The unattenuated frequency range for this file type is 20Hz to 16000Hz. The cadence value given here is computed from the inverse of the sampling rate (35.71 kHz). For a description of the PWI receivers and the different operational modes see: http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html

27) Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 16 kHz bandwidth, 6-channel Fields maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/LHFWR.16kHz.PT0.000028S
Start:1996-03-25 00:00:00 Observatory:POLAR Cadence:0.000028 seconds
Stop:1997-09-17 00:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
PWI>Plasma Wave Instrument Reference: Gurnett, D.A. et al, The Polar Plasma Wave Instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995. donald-gurnett@uiowa.edu An FFT on 1024 values was used in calibrating the data; i.e., perform FFT, calibrate in frequency domain, perform inverse FFT to get calibrated time series. Coordinate system used: local magnetic field-aligned, a spacecraft centered coordinate system where Z is parallel to the local B-field determined from Polar MFE, X points outward and lies in the plane defined by the Z-axis and the radial vector from the earth to the spacecraft, and Y completes a right-handed system and points eastward. The X- and Z-axes are contained in the north-south plane. Effective bandwidth is 1.5*delta_f, where delta_f depends on the size of the FFT used to convert to the frequency domain, and delta_t. These data come in snapshots of 31816 points per channel, every 9.2 seconds, where the duration of each snapshot is 0.045 seconds. The time for individual samples is the epoch time of the snapshot incremented by delta_t in milliseconds for each successive sample. That is: sample_time = epoch_time + sample_offset * delta_t The data in this file will be in sets of 31744 (31*1024) points per channel because the FFT size does not come out even within the number of points per snapshot. To obtain the time for each point in the snapshot, increment each Epoch time after the first with Delta_T (in ms). The unattenuated frequency range for this file type is 20Hz to 16000Hz. The cadence value given here is computed from the inverse of the sampling rate (35.71 kHz). For a description of the PWI receivers and the different operational modes see: http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html

28) Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 2 kHz, Time Domain Fields maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/LHFWR.2kHz.PT0.000224S
Start:1996-03-26 00:00:00 Observatory:POLAR Cadence:0.000224 seconds
Stop:1997-09-17 00:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
An FFT on 2048 values was used in calibrating the data; i.e., perform FFT, calibrate in frequency domain, perform inverse FFT to get calibrated time series. Data are lowpass filtered so that the data are valid only up to 2 kHz. The three orthogonal magnetic field components are given in units of nT/Sec rather than nT because the response of the searchcoils across the passband is not flat. In order to obtain units of nT, the data would need to be digitally filtered to the frequency of interest and then integrated over time. Integrating over the entire passband could possibly destroy the resolution of the higher frequency components since the low frequency noise, if present, will dominate. Effective Bandwidth is 1.5*delta_f, where delta_f depends on the size of the FFT used to convert to the frequency domain, and delta_t. The unattenuated frequency range for this file type is 20Hz to 2000Hz. The cadence value given here is computed from the inverse of the sampling rate (4.46 kHz). For a description of the PWI receivers and the different operational modes see: http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html

29) Polar PWI MCA Survey Spectrograms maxmize
Resource ID:spase://VWO/DisplayData/POLAR/PWI/MCA.DS.P1D
Start:1996-03-25 00:00:00 Observatory:POLAR Cadence:
Stop:1997-09-16 17:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:DisplayData
The Polar PWI Multichannel Analyzer (MCA) collected data from March 1996 to September 1997. The MCA data has very good time resolution (~1 s) but relatively poor frequency resolution. An electric field measurement covers 5.6 Hz to 311 kHz in 20 channels logarithmically spaced. The magnetic field measurements cover a range from 5.6 Hz to 10 kHz in 14 channels logarithmically spaced. Each file consists of two plots. Each plot contains the power spectral density (color scale) of received signal (upper plot: electric (V^2 m^-2 Hz^-1), lower plot: magnetic (nT^2 Hz^-1) ) as a function of operating frequency (in a logarithmic scale on vertical axis) and time (horizontal axis). At the top of each plot is a title indicating the Instrument, Receiver and Antenna used along with the time span for the spectrogram. Overlaid on each image is a trace of the electron gyrofrequency. Beneath the time labels on the horizontal axis of the lower plot are ephemeris data: position of the spacecraft in radial distance (Earth radii), geomagnetic latitude, magnetic local time, and McIlwain L-shell. Overlaid on each image is a trace of the electron gyrofrequency. Reference: Gurnett, D.A. et al, The Polar plasma wave instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995.

30) Polar Plasma Wave Instrument, Multichannel Analyzer - 1.3 sec resolution fields maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/MCA.PT1.3S
Start:1996-03-25 00:00:00 Observatory:POLAR Cadence:1.3 seconds
Stop:1997-09-16 17:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
The PO_H0_PWI Multichannel Analyzer (MCA) CDF files provide good time resolution with relatively poor frequency resolution. An electric field measurement covers 5.6 Hz to 311 kHz in 20 channels logarithmically spaced. The magnetic field measurements cover a range from 5.6 Hz to 10 kHz in 14 channels logarithmically spaced. Reference: Gurnett, D.A. et al, The Polar plasma wave instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995. Note: The electron cyclotron frequencies are derived from the following: Fce = 0.028 kHz*B, where B is the magnitude of the ambient magnetic field measured in nT.

31) Polar Plasma Wave Instrument HFWR Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/PWI/PT0.0000015S
Start:1996-02-27 12:20:27 Observatory:POLAR Cadence:0.0000015 seconds
Stop:1997-09-16 16:51:41 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
This set of plasma waves in the Earth's polar regions comes from the high-frequency waveform receiver (HFWR) of the Polar Plasma Wave Instrument (PWI) in 6 channels from 20 Hz to 25 kHz in 1.5 microsecond resolution. Data comes in snapshots of 31816 points per channel, every 9.2 seconds, where the duration of each snapshot is 0.045 seconds. Since Epoch time is in milliseconds, the times for the data points will not be unique unless the Delta_T in milliseconds is added to the Epoch time for the snapshot.

32) Polar Plasma Wave Instrument HFWR Wideband Receiver Data maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/PWI/PT0.000016S
Start:1996-02-27 12:20:27 Observatory:POLAR Cadence:0.000016 seconds
Stop:1997-09-16 16:51:41 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
This set of electric plasma wave components in the Earth's polar regions comes the Wide Band Receiver of the Polar Plasma Wave Instrument (PWI) sampled at 16 microseconds resolution. The frequency filters used for the wideband receiver have a range that limit the calibration. The following table specifies the range of frequencies for which the calibration is certified. Outside this range the amplitude values may be in error and should not be used. (Translation, Filter, Freq Range) (0 kHz, 90 kHz, 7.5 kHz-90.0 kHz) (125 kHz, 90 kHz, 131.9 kHz-214.8 kHz) (250 kHz, 90 kHz, 254.3 kHz-341.2 kHz) (500 kHz, 90 kHz, 504.79 kHz-591.1 kHz) (0 kHz, 10 kHz, 0.035 kHz-11.64 kHz) (0 kHz, 22 kHz, 0.065 kHz-21.59 kHz) (0 kHz, 1-3 kHz, 1.0 kHz-3.0 kHz) (0 kHz, 3-6 kHz, 3.0 kHz-6.0 kHz).

33) PWI digital data at full resolution, 1996-7 maxmize
Resource ID:spase://VSPO/NumericalData/POLAR/PWI/PT600.00S
Start:1996-02-27 00:00:00 Observatory:POLAR Cadence:600.00 seconds
Stop:1967-09-16 00:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
PWI Sweep Frequency Receiver and Multi Channel Analyzer digital data at full resolution, accessible as ASCII tables

34) Polar PWI SFR-A Daily Dynamic Spectrograms maxmize
Resource ID:spase://VWO/DisplayData/POLAR/PWI/SFR.A.DS.P1D
Start:1996-03-25 00:00:00 Observatory:POLAR Cadence:
Stop:1997-09-16 17:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:DisplayData
The Polar Sweep Frequency Receiver-A (SFR-A) made use of either the Eu (130 m, spin-plane) or Ez (14 m, spin axis) two-sphere electric dipole antennas. Between March 25, 1996 and May 26, 1996, the Eu antenna was the default antenna, from May 27, 1996 through February 9, 1997 the Ez antenna was used and from February 10, 1997 until September 17, 1997 the SFR-A returned to using the Eu antenna. The SFR-A receiver spanned the frequency range from 26 Hz to 808 kHz in 5 bands: 26-200 Hz, 0.2 - 1.6 kHz, 1.7 - 12.6 kHz, 13-100 kHz, 100-808 kHz. Each image is a daily plot of the power spectral density (V^2 m^-2 Hz^-1) of received signal (color scale) as a function of operating frequency (in a logarithmic scale on vertical axis) and time (horizontal axis). At the top of each plot is a title indicating the Instrument, Receiver and Antenna used followed by the time span for the spectrogram. Beneath the time labels on the horizontal axis are ephemeris data: position of the spacecraft in radial distance (Earth radii), geomagnetic latitude, magnetic local time, and McIlwain L-shell. Overlaid on each image is a trace of the electron gyrofrequency.

35) Polar Plasma Wave Instrument, Sweep Frequency Receivers A and B - 2 sec resolution fields maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/SFR.AB.PT2S
Start:1996-03-25 00:00:00 Observatory:POLAR Cadence:2 seconds
Stop:1997-09-16 17:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
The PO_H1_PWI CDF files contain spectral densities of magnetic and electric field measurements from the Sweep Frequency Receiver-A and B. These files also contain correlation, electron cyclotron frequency, upper hybrid frequency and electron number density data. A full frequency sweep for the SFR takes about 33 seconds. From about 12.5 kHz to 800 kHz a full frequency spectrum can be obtained every 2.4 sec in the log mode. There are 224 SFR frequency bands, logarithmically spaced. When SFR_MODE is Linear, the 448 linear frequency bands are mapped to 224 logarithmic bands. The Polar Sweep Frequency Receiver-A (SFR-A) made use of either the Eu (130 m, spin-plane) or Ez (14 m, spin axis) two-sphere electric dipole antennas. Between March 25, 1996 and May 26, 1996, the Eu antenna was the default antenna, from May 27, 1996 through February 9, 1997 the Ez antenna was used and from February 10, 1997 until September 17, 1997 the SFR-A returned to using the Eu antenna. The SFR-A receiver spanned the frequency range from 26 Hz to 808 kHz in 5 bands: 26-200 Hz, 0.2 - 1.6 kHz, 1.7 - 12.6 kHz, 13-100 kHz, 100-808 kHz. The Polar PWI Sweep Frequency Receiver-B (SFR-B) collected data from March 1996 to September 1997. The SFR-B used the magnetic loop antenna (mounted on a 6m boom and oriented parallel to the Eu antenna). The SFR-B receiver spanned the frequency range from 26 Hz to 808 kHz in 5 bands: 26-200 Hz, 0.2 - 1.6 kHz, 1.7 - 12.6 kHz, 13-100 kHz, 100-808 kHz.

36) Polar PWI SFR-B Daily Dynamic Spectrograms maxmize
Resource ID:spase://VWO/DisplayData/POLAR/PWI/SFR.B.DS.P1D
Start:1996-03-25 00:00:00 Observatory:POLAR Cadence:
Stop:1997-09-16 17:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:DisplayData
The Polar PWI Sweep Frequency Receiver-B (SFR-B) collected data from March 1996 to September 1997. The SFR-B used the magnetic loop antenna (mounted on a 6m boom and oriented parallel to the Eu antenna). The SFR-B receiver spanned the frequency range from 26 Hz to 808 kHz in 5 bands: 26-200 Hz, 0.2 - 1.6 kHz, 1.7 - 12.6 kHz, 13-100 kHz, 100-808 kHz. Each image is a daily plot of the power spectral density (nT^2 Hz^-1) of received signal (color scale) as a function of operating frequency (in a logarithmic scale on vertical axis) and time (horizontal axis). At the top of each plot is a title indicating the Instrument, Receiver and Antenna used followed by the time span for the spectrogram. Beneath the time labels on the horizontal axis are ephemeris data: position of the spacecraft in radial distance (Earth radii), geomagnetic latitude, magnetic local time, and McIlwain L-shell. Overlaid on each image is a trace of the electron gyrofrequency.

37) Polar Plasma Wave Instrument, Wideband Receiver (WBR) 4.016 microsecond resolution maxmize
Resource ID:spase://VWO/NumericalData/POLAR/PWI/WBR.PT0.000004016S
Start:1996-03-25 10:00:00 Observatory:POLAR Cadence:0.000004016 seconds
Stop:1997-09-17 00:00:00 Instrument:Polar Plasma Waves Investigation (PWI) Resource:NumericalData
PWI>Plasma Wave Instrument Reference: Gurnett, D.A. et al, The Polar Plasma Wave Instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995. donald-gurnett@uiowa.edu An FFT on 1992 values was used in calibrating the data; i.e., perform FFT, calibrate in frequency domain, perform inverse FFT to get calibrated time series. Coordinate system used: antenna coordinate system, where the u-axis is offset by -45 degrees from the spacecraft x-axis, the v-axis is offset by -45 degrees from the spacecraft y-axis, and the z-axis is identical to the spacecraft z-axis. The effective noise bandwidth is the data sampling frequency divided by the size of the FFT (number of input samples) multiplied by 1.5 to to correct for the effects of a Hanning window applied to the time- domain samples. Hence, the effective noise bandwidth is 1.5 * delta_f. These data come in snapshots of 1992 or 3984 points every 0.064 seconds. Duration of a snapshot is less when the instrument is in duty cycle modes. Since Epoch time is in milliseconds, the times for the data points will not be unique unless the fmsec (fraction of milliseconds) is appended to the Epoch0 time for that point. The frequency filters used for the wideband receiver have a range that limits the calibration. The following table specifies the range of frequencies for which the calibration is certified. Outside this range the amplitude values may be in error and should not be used. +------------------------------------------------+ |Translation| Filter| | Freq Range| |------------------------------------------------| | 0 kHz| 90 kHz| | 7.5 kHz- 90.0 kHz| | 125 kHz| 90 kHz| | 131.9 kHz-214.8 kHz| | 250 kHz| 90 kHz| | 254.3 kHz-341.2 kHz| | 500 kHz| 90 kHz| | 504.79 kHz-591.1 kHz| | 0 kHz| 10 kHz| | 0.035 kHz- 11.64 kHz| | 0 kHz| 22 kHz| | 0.065 kHz- 21.59 kHz| | 0 kHz| 1-3 kHz| | 1.0 kHz- 3.0 kHz| | 0 kHz| 3-6 kHz| | 3.0 kHz- 6.0 kHz| +------------------------------------------------+ The cadence value given here is computed from the inverse of the sampling rate (249 kHz). For a description of the PWI receivers and the different operational modes see: http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html

38) Polar TIDE Level-zero telemetry files maxmize
Resource ID:spase://VMO/NumericalData/POLAR/TIDE/Level-zero
Start:1996-03-27 00:00:00 Observatory:POLAR Cadence:9.2 seconds
Stop:2008-04-16 23:59:59 Instrument:Thermal Ion Dynamics Experiment (TIDE) Resource:NumericalData
TIDE level-zero processing software provides several analysis and display options with an extensive list of processing options. The TIDE team has provided websites that allow users to process data from the web and then download the processed datafiles and plots, see the Custom Plot and Data Dump links on one of the TIDE Home Pages. The software (C and IDL) can be downloaded and installed locally. There is a data download page that can be used to get the level-zero data and the required ancillary data (Polar orbit and attitude, extracted EFI spacecraft potential, and ion masks). NOTE: The only way to read a TIDE level-zero file is with the processing software. See the TIDE Documentation link on one of the two TIDE Home Pages for documentation of the processing software and the input file data formats. See the parameters below for more information about key elements in the level-zero processing.

39) Polar TIMAS H0 High-resolution Level 1 Data maxmize
Resource ID:spase://VMO/NumericalData/POLAR/TIMAS/H0_PT12S
Start:1996-03-17 00:03:19 Observatory:POLAR Cadence:12 seconds
Stop:2004-04-03 09:04:47 Instrument:Toroidal Imaging Mass-Angle Spectrograph (TIMAS) Resource:NumericalData
Mass resolved ion energy angle spectra covering nearly the full 4pi solid angle and the energy range 15 eV/q to 33 eV/q. H+, O+, He+ and He++ number fluxes and statistical uncertainties processed by the TIMAS science team. Data acquired with various angular and energy resolutions are combined here. Data Quality and other indicators are provided to allow selection of high resolution data (PA_status(ion)=0 and Energy_status(ion)=0 ) and High Quality data (Quality=0). See caveats for the following variables for more detailed information: Quality, PA_status, Energy_status Bcr, Fec, Even_odd, Energy_Range_ID and Spins. Reference:E.G. Shelley et al., The Toroidal Imaging Mass-Angle Spectrograph (TIMAS) for the Polar Mission, Sp. Sci. Rev, Vol 71, pp 497-530, 1995. Version 0: December, 1997 Version 1: July, 1998 Version 2: December, 2000 Algorithm improved to more accurately subtract backgrounds arising from spill over from H+ into He++ channel and other sources. Fill data are now inserted for limited energy and pitch angle ranges for Flux_H Flux_O Flux_He_1 and Flux_He_2 variables. The meanging of values of the of Quality variable was slightly modified. Version 3: June, 2002 Algorithm for V_02 had an error that resulted in under estimation of fluxes in high count regions, i.e. the cusp/cleft and radiation belts. V_03 corrects this error and has been expanded to include calculation of fluxes obtained after December 8, 1998, when TIMAS had a damaging high voltage breakdown that resulted in reduced sensitivity.

40) Polar TIMAS H2 Level 1 Ion Upflowing Fluxes Data maxmize
Resource ID:spase://VMO/NumericalData/POLAR/TIMAS/H2_PT12S
Start:1996-03-17 00:03:25 Observatory:POLAR Cadence:12 seconds
Stop:1998-12-08 22:55:45 Instrument:Toroidal Imaging Mass-Angle Spectrograph (TIMAS) Resource:NumericalData
H+, O+, He+ and He++ upflowing fluxes and statistical uncertainties processed by the TIMAS science team.These data were used in preparing several papers, see Information URLs. Includes also non-TIMAS Data: UT, altitude, invariant latitude, L shell, magnetic local time, geomagnetic latitude (signed - n/s hemisphere), average magnetic field vector in GSM coordinates at Polar (uses KH's co-ord conversion code), spacecraft potential from EFI data base, solar zenith angles at each end of the field line, time delayed solar wind parameters from WIND (Using KH's database) interpolated across data gaps of less than 10 minutes, IMF in GSM, solar wind dynamic pressure (nPa), solar wind density (/cc), solar wind velocity (km/sec). This is a summary data base.It does not contain detailed energy step and pitch angle information for each data point. Extends over all altitudes, invariant latitudes and MLT. Below altitude of 4.0 Re 2 spin resolution (12s), above altitude of 4.0 Re 4 spin resolution (24s). Reference:E.G. Shelley et al., The Toroidal Imaging Mass-Angle Spectrograph (TIMAS) for the Polar Mission, Sp. Sci. Rev, Vol 71, pp 497-530, 1995.

41) Polar TIMAS K1 Key Parameter data maxmize
Resource ID:spase://VMO/NumericalData/POLAR/TIMAS/K1_PT96S
Start:1999-06-07 00:09:31 Observatory:POLAR Cadence:96 seconds
Stop:2008-04-16 13:22:28 Instrument:Toroidal Imaging Mass-Angle Spectrograph (TIMAS) Resource:NumericalData
H+, O+, He+ and He++ number fluxes for survey purposes only Reference:E.G. Shelley et al., The Toroidal Imaging Mass-Angle Spectrograph (TIMAS) for the Polar Mission, Sp. Sci. Rev, Vol 71, pp 497-530, 1995. Version 0: June, 2001

42) Polar TIMAS K2 Mass Spectral Data maxmize
Resource ID:spase://VMO/NumericalData/POLAR/TIMAS/K2_PT192S
Start:1996-03-16 12:47:36 Observatory:POLAR Cadence:192 seconds
Stop:2006-05-28 23:57:58 Instrument:Toroidal Imaging Mass-Angle Spectrograph (TIMAS) Resource:NumericalData
Mass spectra count rates for survey purposes only from the POLAR TIMAS instrument. The mass spectral data product consists of 64 mass steps covering the full detector range, for each of 6 large solid angles, for 8 selected energy steps. The data product is accumulated for 2, 4, 8, 16, or 32 spin (6 s) periods. Because of telemetry restrictions only selected data products were telemetered to the ground. The 6 angular bins cover the full instrumental range and nearly 4pi steradians. Two of the look directions are centered on the spacecraft spin axis. For the first part of the mission, the spin axis was orbit normal and the pitch angles sampled in these look directions are near 90 degrees. The other 4 look directions are in the spin plane. Data are de-spun on board based on the spin rate and time of the "sun pulse". The digital data product provides the center pitch angle of each of the 6 look directions and an estimate of the variation of the pitch angle during the accumulation time. Reference: E.G. Shelley et al., The Toroidal Imaging Mass-Angle Spectrograph (TIMAS) for the Polar Mission, Sp. Sci. Rev, Vol 71, pp 497-530, 1995.

43) Polar Ultraviolet Imager H0 High-Resolution Images maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/UVI/H0
Start:1996-03-23 15:56:15 Observatory:POLAR Cadence:
Stop:2008-02-10 18:40:28 Instrument:Ultraviolet Imager (UVI) Resource:DisplayData
This data set contains detected and produced images of the ultraviolet light of the aurora, day and night. from the Polar UltraViolet Imager (UVI) experiment.

44) Polar Ultraviolet Imager H1 High-Resolution Images maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/UVI/H1
Start:1998-04-29 11:52:00 Observatory:POLAR Cadence:
Stop:1998-05-09 20:20:00 Instrument:Ultraviolet Imager (UVI) Resource:DisplayData
This dataset contains high resolution MPEG canned images of aurora and airglow from the Polar Ultraviolet Imager (UVI).

45) Polar Ultraviolet Imager, Key Parameters maxmize
Resource ID:spase://VMO/NumericalData/POLAR/UVI/K0_CDF
Start:1996-03-23 15:56:15 Observatory:POLAR Cadence:
Stop:2008-02-10 18:40:28 Instrument:Ultraviolet Imager (UVI) Resource:NumericalData
The Ultraviolet Imager (UVI) is a small camera that detected and produced images of the ultraviolet light of the aurora, day and night. Key Parameter (KP) images are calculated at nominal 5-10 minute intervals at spacecraft altitudes above 6 Re. The UVI KP image is background subtracted and calibrated to radiance values (photon cm^-2 cm^-1). The data is a rectangular two-dimensional array (228 rows x 200 columns). Only a circular region of the rectangular array contains valid image data. The UVI KP Image Archive (http://tideuvira.nsstc.nasa.gov/uvi/kpgs-Data.htm) allows the user to look at all the KP Mosaics for a selected month. The gif or png plot files contain the up to 35 KP images taken with the LBHL filter. Reference images are also provided showing the location of the UVI field of view relative to continental outlines.

46) Polar VIS Images from CDAWeb maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/VIS/EJ
Start:1996-06-17 00:00:00 Observatory:POLAR Cadence:
Stop:2000-07-16 00:00:00 Instrument:Visible Imaging System (VIS) Resource:DisplayData
Polar VIS Images from CDAWeb

47) Polar Visible Imaging System 24-sec Key Parameters maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/VIS/PT240S
Start:1996-11-01 00:00:00 Observatory:POLAR Cadence:240 seconds
Stop:2008-04-28 00:00:00 Instrument:Visible Imaging System (VIS) Resource:DisplayData
This dataset contains the investigator-selected Key Parameters from the Polar Visible Imaging System (VIS). The VIS key parameter data set is a survey of auroral activity provided by a series of single images showing a significant area of the auroral zone at visible wavelengths. An auroral image of 256 x 256 pixels is produced approximately every 24 seconds dependent on the integration time and filter selected. Some coordinate information is included for viewer orientation. Coordinates are calculated for a grid of 18 x 18 points corresponding to one pixel out of every 15 x 15 pixel block. In addition, a rotation matrix and a table of distortion-correcting look direction unit vectors are provided for the purpose of calculating coordinates for every pixel. To facilitate viewing of the images, a mapping of pixel value to a recommended color table based on the characteristics of the selected filter is included with each image. A relative intensity scale is provided by the uncompressed count table of variable 27. Approximate intensity levels in kiloRayleighs are given in the intensity table of variable 28. The VIS site at http://eiger.physics.uiowa.edu/~vis/software contains information on the availability of more precisely calibrated intensities. The data set also contains various imager-related parameters, plus spacecraft position and velocity vectors, spin axis unit vector, and the sun position unit vector, all in GCI coordinates. Times are given in both the CDF-standard Epoch and the ISTP-standard Time_PB5.

48) Polar Visible Imaging System Earth Camera Key Parameters maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/VIS/PT300S
Start:1996-11-01 00:00:00 Observatory:POLAR Cadence:300 seconds
Stop:2008-04-28 00:00:00 Instrument:Visible Imaging System (VIS) Resource:DisplayData
This dataset contains the investigator-selected Earth Camera Key Parameters from the Polar Visible Imaging System (VIS). It contains global images of the auroral oval at ultraviolet wavelengths. One or more Earth camera images of 256 x 256 pixels are produced every five minutes, depending on the commanded mode. Some coordinate information is included for viewer orientation. Coordinates are calculated for a grid of 18 x 18 points corresponding to one pixel out of every 15 x 15 pixel block. In addition, a rotation matrix and a table of distortion-correcting look direction unit vectors are provided for the purpose of calculating coordinates for every pixel. To facilitate viewing of the images, a mapping of pixel value to a recommended color table based on the characteristics of the selected filter is included with each image. A relative intensity scale is provided by the uncompressed count table of variable 27. Approximate intensity levels in kiloRayleighs are given in the intensity table of variable 28. The VIS site at http://eiger.physics.uiowa.edu/~vis/software contains information on the availability of more precisely calibrated intensities. The data set also contains various imager-related parameters, plus spacecraft position and velocity vectors, spin axis unit vector, and the sun position unit vector, all in GCI coordinates. Times are given in both the CDF-standard Epoch and the ISTP-standard Time_PB5.

49) Polar VIS Images from U. Iowa maxmize
Resource ID:spase://VSPO/DisplayData/POLAR/VIS/UIOWA
Start:1996-06-17 00:00:00 Observatory:POLAR Cadence:
Stop:2008-04-16 00:00:00 Instrument:Visible Imaging System (VIS) Resource:DisplayData
Polar VIS Images to near current from U. Iowa

50) Polar HYDRA 14-sec Moments maxmize
Resource ID:spase://VSPO/NumericalData/Polar/HYDRA/Moments/PT14S
Start:1996-03-20 14:38:27 Observatory:POLAR Cadence:14 seconds
Stop:2008-04-15 21:00:18 Instrument:Hot Plasma Analyzer (Hydra) Resource:NumericalData
This data set from the POLAR Hot Plasma Analyzer (HYDRA) contains survey electron and proton moments for density, bulk velocity (GSM), and temperature in parallel and perpendicular directions at 13.8-second resolution as determined for s/c potential at 0-20keV. Higher quality data products may be available from the P.I. The direction designations "parallel,""perpendicular," and "antiparallel" refer to the magnetic field and indicate sample averaging over pitch-angle ranges of 0-30, 75-105, and 150-180 degrees. Reference: HYDRA is a 3-Dimensional Electron and Ion Hot Plasma Instrument for the Polar Spacecraft of the GGS Mission, J. Scudder et al., Space Sci. Rev., 71,459-495, Feb. 1995. http://www-st.physics.uiowa.edu

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