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1) AMPTE/IRM Magnetic Field maxmize
Resource ID:spase://VMO/NumericalData/AMPTE_IRM/MAG/PT4.4S
Start:1984-08-21 00:48:41 Observatory:AMPTE/IRM Cadence:4.4 seconds
Stop:1986-08-11 21:45:07 Instrument:AMPTE/IRM Magnetometer Resource:NumericalData
AMPTE/IRM spin-averaged magnetic field at ~4.4 second resolution.

2) AMPTE/IRM Plasma Data maxmize
Resource ID:spase://VMO/NumericalData/AMPTE_IRM/Plasma/PT4.4S
Start:1984-08-22 12:58:03 Observatory:AMPTE/IRM Cadence:4.4 seconds
Stop:1986-08-11 21:32:28 Instrument:AMPTE/IRM Plasma Instrument Resource:NumericalData
AMPTE/IRM spin-averaged plasma moments at ~4.4 second resolution.

3) Cluster Auxiliary Data maxmize
Resource ID:spase://VMO/NumericalData/Cluster/Ephemeris/SummaryParameter/PT1M
Start:2000-08-22 00:00:30 Observatory:Cluster FM5 (Rumba) Cadence:1 minute
Stop:2016-05-19 13:22:47 Instrument:Cluster-Rumba Positions Resource:NumericalData
Cluster Auxiliary Parameters are produced by the Cluster Hungarian Data Center in Budapest. These data are the primary orbit product supplied to users by the Cluster Active Archive. The data contain Position, Velocity and Attitude of four Cluster spacecraft. For additional details on the methodology behind these data see: Robert P., et al., "Tetrahedron Geometric Factors", p. 328, Analysis Methods of Multi-Spacecraft Data, ed. G. Paschmann and P. Daly, 1998, ESA and the International Space Institute, Bern.

4) Double Star 1 Spacecraft Auxiliary Summary Parameters Data maxmize
Resource ID:spase://VMO/NumericalData/DoubleStar1/Ephemeris/SummaryParameters/PT60S
Start:2004-01-05 00:00:30 Observatory:Double Star 1 Cadence:60 seconds
Stop:2007-09-19 23:59:30 Instrument:Double Star 1 Spacecraft Position Resource:NumericalData
The Double Star 1 auxiliary summary parameter data set contains various parameters in GSE coordinates at 60 s resolution. These parameters include universal time, orbit number, GSE position, GSE spacecraft velocity vector, longitude, and dipole tilt. These parameters are available through Double Star Science Data Centre The Data Ring with restricted access.

5) DE1 8 sec Position Data maxmize
Resource ID:spase://VWO/NumericalData/DynamicsExplorer1/Ephemeris/PT8S
Start:1981-09-16 05:21:48 Observatory:Dynamics Explorer 1 Cadence:8 seconds
Stop:1984-06-28 20:35:55 Instrument:DynamicsExplorer1 Positions Resource:NumericalData
Two Dynamics Explorer (DE) spacecraft were launched August 3, 1981, and placed into coplanar polar orbits with DE-1 in a highly elliptical orbit and DE-2 in a lower more circular orbit. The primary objective of the DE program was to investigate magnetosphere-ionosphere-atmosphere coupling processes. The DE mission provided a wealth of new information on a wide variety of magnetospheric plasma wave phenomena including auroral kilometric radiation, auroral hiss, Z mode radiation, narrow-band electromagnetic emissions associated with equatorial upper hybrid waves, whistler mode emissions, wave-particle interactions stimulated by ground VLF transmitters, equatorial ion cyclotron emissions, ion Bernstein mode emissions, and electric field turbulence along the auroral field lines. These files contain 8 second resolution emphemeris and spacecraft attitude parameters that coincide with DE-1 telemetry frames containing PWI lowrate data. These parameters are not to be taken as an authoritative set, but are convenient when working with PWI science data products. Most of these data are provided in the Geocentric Equatorial Inertial (GEI) TOD reference frame. The Z axis of the GEI frame is parallel to Earth's spin axis; the X axis points towards the First Point of Aries with the Y axis aligned so as to generate a right-handed coordinate system.

6) FAST Spacecraft Positions maxmize
Resource ID:spase://VMO/NumericalData/FAST/Ephemeris/PT1M
Start:1996-01-26 00:00:00 Observatory:FAST Cadence:1 minute
Stop:2011-12-31 00:00:00 Instrument:FAST Position Resource:NumericalData
FAST Positions

7) ISEE 3 12-min Trajectory Data maxmize
Resource ID:spase://VEPO/NumericalData/ISEE3/Ephemeris/PT12M
Start:1978-08-16 00:00:00 Observatory:ISEE 3 Cadence:12 minutes
Stop:1984-02-01 00:00:00 Instrument:ISEE 3 Position Resource:NumericalData
ISEE 3 positions.

8) PolarEFI_SpacecraftAttitude_GEI maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GEI_Attitude
Start:1996-03-16 00:00:00 Observatory: Cadence:600 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The the Polar spacecraft positive spin axis direction vector (normalized to magnitude 1), in GEI coordinates.

9) PolarEFI_SpacecraftAttitude_GEI maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GEI_Attitude
Start:1996-03-16 00:00:00 Observatory: Cadence:600 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The the Polar spacecraft positive spin axis direction vector (normalized to magnitude 1), in GEI coordinates.

10) PolarEFI_SpacecraftPosition_GEI maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GEI_Position
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft position, in GEI coordinates.

11) PolarEFI_SpacecraftPosition_GEI maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GEI_Position
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft position, in GEI coordinates.

12) PolarEFI_SpacecraftVelocity_GEI maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GEI_Velocity
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft velocity, in GEI coordinates.

13) PolarEFI_SpacecraftVelocity_GEI maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GEI_Velocity
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft velocity, in GEI coordinates.

14) PolarEFI_SpacecraftAttitude_GSE maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GSE_Attitude
Start:1996-03-16 00:00:00 Observatory: Cadence:600 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The the Polar spacecraft positive spin axis direction vector (normalized to magnitude 1), in GSE coordinates.

15) PolarEFI_SpacecraftAttitude_GSE maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GSE_Attitude
Start:1996-03-16 00:00:00 Observatory: Cadence:600 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The the Polar spacecraft positive spin axis direction vector (normalized to magnitude 1), in GSE coordinates.

16) PolarEFI_SpacecraftPosition_GSE maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GSE_Position
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft position, in GSE coordinates.

17) PolarEFI_SpacecraftPosition_GSE maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GSE_Position
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft position, in GSE coordinates.

18) PolarEFI_SpacecraftVelocity_GSE maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GSE_Velocity
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft velocity, in GSE coordinates.

19) PolarEFI_SpacecraftVelocity_GSE maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GSE_Velocity
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft velocity, in GSE coordinates.

20) PolarEFI_SpacecraftAttitude_GSM maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GSM_Attitude
Start:1996-03-16 00:00:00 Observatory: Cadence:600 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The the Polar spacecraft positive spin axis direction vector (normalized to magnitude 1), in GSM coordinates.

21) PolarEFI_SpacecraftAttitude_GSM maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GSM_Attitude
Start:1996-03-16 00:00:00 Observatory: Cadence:600 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The the Polar spacecraft positive spin axis direction vector (normalized to magnitude 1), in GSM coordinates.

22) PolarEFI_SpacecraftPosition_GSM maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GSM_Position
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft position, in GSM coordinates.

23) PolarEFI_SpacecraftPosition_GSM maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GSM_Position
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft position, in GSM coordinates.

24) PolarEFI_SpacecraftVelocity_GSM maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_GSM_Velocity
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft velocity, in GSM coordinates.

25) PolarEFI_SpacecraftVelocity_GSM maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_GSM_Velocity
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar spacecraft velocity, in GSM coordinates.

26) PolarEFI_OtherOrbitData maxmize
Resource ID: spase://SMWG/NumericalData/POLAR/EFI/S_C_OtherOrbit
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar non-positional, non-velocity ephemeris data

27) PolarEFI_OtherOrbitData maxmize
Resource ID: spase://VWO/NumericalData/POLAR/EFI/S_C_OtherOrbit
Start:1996-03-16 00:00:00 Observatory: Cadence:60 seconds
Stop:2008-04-14 00:00:00 Instrument: Resource:NumericalData
The Polar non-positional, non-velocity ephemeris data

28) Pioneer10 Positions maxmize
Resource ID:spase://VEPO/NumericalData/Pioneer10/Ephemeris/P1D
Start:1972-01-01 00:00:00 Observatory:Pioneer 10 Cadence:1 day
Stop:2016-05-18 13:22:10 Instrument:Pioneer10 Positions Resource:NumericalData
Pioneer10 satellite positions.

29) Pioneer11 Positions maxmize
Resource ID:spase://VEPO/NumericalData/Pioneer11/Ephemeris/P1D
Start:1972-01-01 00:00:00 Observatory:Pioneer 11 Cadence:1 day
Stop:2016-05-18 13:22:09 Instrument:Pioneer11 Positions Resource:NumericalData
Pioneer11 satellite positions.

30) SCATHA Science Summary Data maxmize
Resource ID:spase://ViRBO/NumericalData/SCATHA/SC1/SC2/SC3/SC4/SC10/SC11/PT1M
Start:1979-02-06 00:00:00 Observatory:SCATHA Cadence:
Stop:1990-05-23 00:00:00 Instrument:SCATHA Engineering and Wave Experiment (SC1) Resource:NumericalData
SCATHA Science Summary Data

31) SCATHA Science Full Resolution Data maxmize
Resource ID:spase://ViRBO/NumericalData/SCATHA/SC1/SC2/SC3/SC4/SC10/SC11/PT1S
Start:1979-02-06 00:00:00 Observatory:SCATHA Cadence:1 second
Stop:1990-05-23 00:00:00 Instrument:SCATHA Engineering and Wave Experiment (SC1) Resource:NumericalData
SCATHA Science Full Resolution Data

32) ST5-094 MAG Data maxmize
Resource ID:spase://VMO/NumericalData/ST5-094/MAG/v1_PT01S
Start:2006-03-26 19:45:50 Observatory:ST5-094 Cadence:
Stop:2006-06-25 02:52:18 Instrument:ST5-094 Fluxgate Magnetometer Resource:NumericalData
Magnetic field and position data from the ST5-094 satellite. Calibrated science quality data.

33) TWINS 1 - Spacecraft Ephemeris maxmize
Resource ID:spase://VMO/NumericalData/TWINS1/Ephemeris/PT1M45S
Start:2001-04-01 00:01:03 Observatory:TWINS 1 Cadence:1 minute; 45 seconds
Stop:2016-05-19 13:22:44 Instrument:TWINS 1 Positions Resource:NumericalData
Definitive orbit data

34) VOYAGER 1 DAILY POSITION V1.0 maxmize
Resource ID:spase://VMO/NumericalData/Voyager1/Ephemeris/Heliosphere/P1D
Start:1977-09-09 00:00:00 Observatory:Voyager 1 Cadence:1 day
Stop:2005-01-24 00:00:00 Instrument:Voyager 1 Positions Resource:NumericalData
Data Set Overview ================= These data were obtained from running the program HELICOOR in the public directory NSSDCA::ANON_DIR:[ACTIVE.HELIO]. These data are based on predicted trajectories calculated with the GTDS code by the NSSDC Satellite Situation Center and converted to solar ecliptic and heliographic coordinates by the HELIOCOOR program. The HELICOOR code was written by R. Parthasarathy. The program GENTRJCON added the HILLON longitude. Note that the solar ecliptic coordinates are given with respect to true equinox and ecliptic of date. The solar ascending node was located at ecliptic longitude +74.367 degrees as of 1 Jan. 1900 at 1200 UT; this longitude increases by 1.4 degrees/century. Data Formats ============ field description ----- ------------------------------ 1. Date YYYY DDD.DD where YY=year and DDD.DD=decimal day 2. Range Heliocentric range in AU 3. SE_Lat Solar Ecliptic latitude in degrees 4. SE_Lon Solar Ecliptic longitude in degrees 5. HG_Lat Heliographic latitude in degrees 6. HG_Lon Heliographic longitude in degrees 7. IHG_Lon Inertial Heliographic longitude in degrees with respect to the ascending node of the solar equator in the ecliptic. Contact Information =================== R. P. (Sardi) Parthasarathy Hughes STX Corporation / Space Physics Data Facility NASA Goddard Space Flight Center Greenbelt, Maryland sardi@nssdca.gsfc.nasa.gov Phone: (301) 286-8105 Acknowledgement =============== Use of these data in publications should be accompanied at minimum by acknowledgements of the National Space Science Data Center and the responsible Principal Investigator defined in the experiment documentation provided here.

35) VG1 JUP EPHEMERIS SYSTEM III (1965) COORDS BROWSE V1.1 maxmize
Resource ID:spase://VMO/NumericalData/Voyager1/Ephemeris/Jupiter/PT96S
Start:1979-03-03 00:00:35 Observatory:Voyager 1 Cadence:96 seconds
Stop:1979-03-16 23:59:56 Instrument:Voyager 1 Positions Resource:NumericalData
Data Set Overview ================= Version 1.1 ----------- The SEDR based data provided as part of this data set were originally reviewed and archived with the NSSDC and PDS as version 1.0 (DATA_SET_ID = VG1-J-POS-4-48.0SEC). Version 1.1 includes additional columns not present in the previous version, 96 second rather than 48 second time samples, times converted to 'PDS Style' or ISO standard, and upgrading of PDS labels and templates to version 3.2. The SPICE based data that are also part of this data set were not previously archived with the PDS. This version 1.1 data set replaces previously archived versions. Data Set Description -------------------- This data set consists of Voyager 1 Jupiter encounter ephemeris data in System III (1965) left handed coordinates covering the period 1979-03-03 to 1979-03-16. Two versions, both covering the same time period, but containing slightly different data, are provided. One version was generated by the Voyager MAG team from Voyager 1 SEDR, the other by the PDS/PPI node using the VG1_JUP.BSP and PCK00003.TCP SPICE kernels. Two versions of the spacecraft ephemeris data are provided as an attempt to correct some of the problems in the Voyager SEDR while preserving the ability to reproduce early results. The original SEDR data has a variety of problems which may affect the knowledge of the spacecraft position, or conversely, the timing associated with certain events such as ring plane crossings. The SPICE SPK kernel provided on this disk includes corrections to some, but not all, of the problems associated with the Voyager SEDR. The Navigation and Ancillary Information Facility (NAIF) at JPL may issue a new Voyager SPK kernel in the future that will further improve the knowledge of the spacecraft location in inertial space. There are other differences in the in the two versions of ephemeris data that are the result of improvements in the knowledge of some of the physical constants associated with Jupiter and its moons. Since the Voyager era, there have been updates to the orientation of the jovian spin axis right ascension and declination, the radius of Jupiter, as well as the orbital characteristic and other physical parameters of many of the moons of Jupiter. These changes affect the stated position of the spacecraft in jovigraphic coordinate systems like System III without changing the position of the spacecraft in inertial space. The spin rate of Jupiter is not changed from the System III (1965) rate of 9h 55m 29.71sec (870.536 deg/day). The SPICE planetary constants kernel (PCK) contains both the current IAU definitions of the physical constants for the bodies within in the jovian system (as data) as well as the older IAU definitions (as comments). This is an ASCII text file (PCK00003.TCP) and users of the ephemeris data are encouraged to review it. SEDR generated ephemeris ------------------------ Instrument P.I. : N/A Data Supplier : NSSDC (Voyager MAG Team) Data sampling rate : 96 seconds Data Set Start Time : 1979-03-03T00:00:35.978Z Data Set Stop Time : 1979-03-16T23:59:08.185Z SPICE generated ephemeris ------------------------- Instrument P.I. : N/A Data Supplier : S. Joy Data sampling rate : 48 seconds Data Set Start Time : 1979-03-03T00:00:35.978Z Data Set Stop Time : 1979-03-16T23:59:56.185Z Parameters ========== SEDR generated ephemeris ------------------------ PARAMETER RESOLUTION/ DESCRIPTION NAME UNITS time 96.0 Sec time of the sample (UT) in the format yyyy-mm-ddThh:mm:ss.sssZ m65536 counts spacecraft clock counts mod60 counts fds_line counts sc_x R[J] jovicentric (System III) cartesian sc_y R[J] cartesian position vectors: X, Y, and sc_z R[J] Z vel_x km/s jovicentric X, Y, and Z spacecraft vel_y km/s velocity components vel_z km/s

36) VG1 JUP EPHEMERIS HELIOGRAPHIC COORDS BROWSE V1.0 maxmize
Resource ID:spase://VMO/NumericalData/Voyager1/Ephemeris/Jupiter/PT97S
Start:1979-02-26 00:00:35 Observatory:Voyager 1 Cadence:97 seconds
Stop:1979-03-24 22:49:32 Instrument:Voyager 1 Positions Resource:NumericalData
Data Set Overview ================= This data set consists of Voyager 1 Jupiter encounter ephemeris data in Heliographic coordinates covering the period 1979-02-26 to 1979-03-24. Two versions, both covering the same time period, but containing slightly different data, are provided. One version was generated by the Voyager MAG team from Voyager 1 SEDR, the other by the PDS/PPI node using the VG1_JUP.BSP and PCK00003.TPC SPICE kernels. Two versions of the spacecraft ephemeris data are provided as an attempt to correct some of the problems in the Voyager SEDR while preserving the ability to reproduce early results. The original SEDR data has a variety of problems which may affect the knowledge of the spacecraft position, or conversely, the timing associated with certain events such as ring plane crossings. The SPICE SPK kernel provided on this disk includes corrections to some, but not all, of the problems associated with the Voyager SEDR. The Navigation and Ancillary Information Facility (NAIF) at JPL may issue a new Voyager SPK kernel in the future that will further improve the knowledge of the spacecraft location in inertial space. There are other differences in the in the two versions of ephemeris data that are the result of improvements in the knowledge of some of the physical constants associated with Jupiter and its moons. Since the Voyager era, there have been updates to the orientation of the jovian spin axis right ascension and declination, the radius of Jupiter, as well as the orbital characteristic and other physical parameters of many of the moons of Jupiter. These changes affect the stated position of the spacecraft in jovigraphic coordinate systems like System III without changing the position of the spacecraft in inertial space. The spin rate of Jupiter is not changed from the System III (1965) rate of 9h 55m 29.71sec (870.536 deg/day). The SPICE planetary constants kernel (PCK) contains both the current IAU definitions of the physical constants for the bodies within in the jovian system (as data) as well as the older IAU definitions (as comments). This is an ASCII text file (PCK00003.TCP) and users of the ephemeris data are encouraged to review it. SEDR generated ephemeris ------------------------ Data Supplier : NSSDC Data sampling rate : 96 seconds Data Set Start Time : 1979-02-26T00:00:35.897Z Data Set Stop Time : 1979-03-24T22:47:56.304Z SPICE generated ephemeris ------------------------- Data Supplier : S. Joy Data sampling rate : 48 seconds Data Set Start Time : 1979-02-26T00:00:35.897Z Data Set Stop Time : 1979-03-24T22:49:32.304Z Parameters ========== SEDR generated ephemeris ------------------------ PARAMETER RESOLUTION/ DESCRIPTION NAME UNITS time 96.0 Sec. time of the sample (UT) in the format yyyy-mm-ddThh:mm:ss.sssZ m65536 counts spacecraft clock counts mod60 fds_line sc_x AU heliographic cartesian coordinates sc_y position vectors: X, Y, and Z sc_z vel_x km/s heliocentric X, Y, and Z spacecraft vel_y velocity components vel_z sc_r AU heliographic spherical coordinates sc_lat degrees position vectors: range, latitude, and sc_lon degrees longitude SolEquatorial_to_HG solar equatorial to heliographic coordinates rotation matrix containing 9 1pe15.8 elements HG_to_EarthOrbTrue heliographic to earth orbit true coordinates rotation matrix containing 9 1pe15.8 elements Spacecraft_to_HG payload (spacecraft) to heliographic coordinates rotation matrix containing 9 1pe15.8 elements SPICE generated ephemeris ------------------------- PARAMET

37) VG1 SAT EPHEMERIS KRONOGRAPHIC (L1) COORDS BROWSE V1.1 maxmize
Resource ID:spase://VMO/NumericalData/Voyager1/Ephemeris/Saturn/PT96S
Start:1980-11-10 00:00:34 Observatory:Voyager 1 Cadence:96 seconds
Stop:1980-11-18 22:54:59 Instrument:Voyager 1 Positions Resource:NumericalData
Data Set Overview ================= Data Set Description -------------------- This data set consists of Voyager 1 Saturn encounter ephemeris data in Kronographic (L1) coordinates covering the period 1980-11-10 to 1980-11-18. Two versions, both covering the same time period, but containing slightly different data, are provided. One version was generated by the Voyager MAG team from Voyager SEDR, the other by the PDS/PPI node using the VG1_SAT.TSP and PCK00006.TPC SPICE kernels. Due to inaccuracies in Voyager SEDR, as well as changes in the values of some key parameters (e.g. Saturnian radius) the timing is improved for the SPICE generated data. However, since much of the original analysis was based upon the SEDR generated ephemeris, this data has been included as well. SEDR generated ephemeris ------------------------ Instrument P.I. : N/A Data Supplier : NSSDC Data sampling rate : 96 seconds Data Set Start Time : 1980-11-10T00:00:34.923Z Data Set Stop Time : 1980-11-18T22:54:59.149Z SPICE generated ephemeris ------------------------- Instrument P.I. : N/A Data Supplier : S. Joy Data sampling rate : 96 seconds Data Set Start Time : 1980-11-10T00:00:00.000Z Data Set Stop Time : 1980-11-18T23:58:24.000Z Parameters ========== SEDR generated ephemeris ------------------------ PARAMETER RESOLUTION/ DESCRIPTION NAME UNITS time 96.0 Sec time of the sample (UT) in the format yyyy-mm-ddThh:mm:ss.sssZ m65536 counts spacecraft clock counts mod60 counts fds_line counts sc_x R[J] kronocentric (L1) cartesian sc_y R[J] cartesian position vectors: X, Y, and sc_z R[J] Z vel_x km/s kronocentric (L1) X, Y, and Z spacecraft vel_y km/s velocity components vel_z km/s sc_r R[J] kronocentric (L1) spherical sc_lat degrees coordinates position vectors: range, sc_lon degrees latitude, and longitude CartSys3_to_SphSys3 cartesian L1 coordinates to spherical L1 coordinates rotation matrix containing 9 1pe15.8 elements SC_to_CartSys3 payload (spacecraft) to cartesian L1 coordinates rotation matrix containing 9 1pe15.8 elements SC_to_SphSys3 payload (spacecraft) to spherical L1 coordinates rotation matrix containing 9 1pe15.8 elements SPICE generated ephemeris ------------------------- PARAMETER RESOLUTION/ DESCRIPTION NAME UNITS time 96.0 Sec time of the sample (UT) in the format yyyy-mm-ddThh:mm:ss.sssZ R AU kronocentric (L1) spherical coordinates LAT degrees range, latitude, and longitude position LON degrees LocTime hours angular separation between the meridian containing the sun and the one containing the spacecraft converted to a time. The sun meridian is defined to be noon (12.000), with midnight (0.000) opposite it. Dawn (6.000) and dusk (18.000) are where the sun rises and sets according to the planet's rotation Coordinate System ================= The Kronographic (L1) coordinates is a Saturn centered spherical system, based on the Saturn Longitude System (Voyager Measurements of the Rotation Period of Saturn's Magnetic Field, Desch and Kai

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