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1) AE-C 15-s Unified Abstract data maxmize
Resource ID:spase://VSPO/NumericalData/AE-C/PT15S
Start:1973-12-16 00:00:00 Observatory:AE-C Cadence:15 seconds
Stop:1978-12-11 00:00:00 Instrument:Retarding Potential Analyser/Drift Meter (RPA) Resource:NumericalData
Atmospheric Explorer (AE)-C 15-s aeronomy data from all experiments, including electron, ion and neutral densities, temperatures, composition and winds, and airglow emissions

2) AE-D 15-s Unified Abstract data maxmize
Resource ID:spase://VSPO/NumericalData/AE-D/PT15S
Start:1975-10-06 00:00:00 Observatory:AE-D Cadence:15 seconds
Stop:1976-01-29 00:00:00 Instrument:Retarding Potential Analyzer/Drift Meter Resource:NumericalData
Atmospheric Explorer (AE)-D 15-s aeronomy data from all experiments, including electron, ion and neutral densities, temperatures, composition and winds, and airglow emissions

3) AE-E MSIS Neutral Density Data maxmize
Resource ID:spase://VSPO/NumericalData/AE-E/BIMS_OSS/PT256S
Start:1977-07-01 00:00:00 Observatory:AE-E Cadence:256 seconds
Stop:1981-06-09 23:59:59 Instrument:Bennett Ion-Mass Spectrometer (BIMS) Resource:NumericalData
This set of neutral density data was deduced from the mass spectrometer measurements on the Atmosphere Explorer E's Bennett Ion-Mass Spectrometer and Open-Source Neutral Mass Spectrometer. The density numbers (in cm-3) for hydrogen, nitrogen and molecular oxygen were provided by A. Hedin (GSFC, Code 914, now retired). They are related to A. Hedin's atmospheric modelling work (Mass Spectrometer and Incoherent Scatter atmospheric model - MSIS). In addition to density, the record includes also orbital parameters.

4) AE-E 15-s Unified Abstract data maxmize
Resource ID:spase://VSPO/NumericalData/AE-E/PT15S
Start:1975-12-11 00:00:00 Observatory:AE-E Cadence:15 seconds
Stop:1981-06-06 00:00:00 Instrument:Retarding Potential Analyzer/Drift Meter Resource:NumericalData
Atmospheric Explorer (AE)-E 15-s aeronomy data from all experiments, including electron, ion and neutral densities, temperatures, composition and winds, and airglow emissions

5) Aeros-A Neutral Gas Densities maxmize
Resource ID:spase://VSPO/NumericalData/Aeros-A/NATE/PT256S
Start:1972-12-26 00:00:00 Observatory:Aeros-A Cadence:256 seconds
Stop:1973-08-09 23:59:59 Instrument:The Neutral Atmosphere Temperature Experiment (NATE) Resource:NumericalData
This data set contains the neutral densities measured by the Neutral Density and Temperature Probe (PI: N. Spencer) during the AEROS-A satellite mission. The data are in ASCII format and cover the time period from 12/26/1972 to 8/9/1973. The four different files provided in this data set contain the data for He, O2, N2, and Ar, respectively. Each data record provides date, time, density, density error, altitude, latitude and longitude, and local solar time.

6) DE 2 1s NACS Temperature and Composition maxmize
Resource ID:spase://VSPO/NumericalData/DE2/NACS/PT1S
Start:1981-08-08 00:00:00 Observatory:Dynamics Explorer 2 Cadence:1 second
Stop:1983-02-15 00:00:00 Instrument:Neutral Atmosphere Composition Spectrometer (NACS) Resource:NumericalData
This data set containss, at 1-sec resolution, the neutral temperature and the densities (and % error) of O, N2, He, N, and Ar from the Neutral Atmosphere Composition Spectrometer (NACS) flown on DE 2. Composition data are most reliable at altitudes less than 500 km. Data are available in ASCII from nssdcftp and in CDF format from CDAWeb (as well as CDAWeb plots and lists).

7) DE-2 16-s Unified Abstract data maxmize
Resource ID:spase://VSPO/NumericalData/DE2/RPA/PT16S
Start:1981-08-06 00:00:00 Observatory:Dynamics Explorer 2 Cadence:16 seconds
Stop:1983-02-15 00:00:00 Instrument:Retarding Potential Analyzer (RPA) Resource:NumericalData
Dynamics Explorer (DE)-2 16-s aeronomy data from all experiments, including electron, ion and neutral densities, temperatures, composition and winds, and airglow emissions

8) DE 2 2s WATS Wind Velocity, Density and Temperature maxmize
Resource ID:spase://VSPO/NumericalData/DE2/WATS/PT2S
Start:1981-08-08 00:00:00 Observatory:Dynamics Explorer 2 Cadence:2 seconds
Stop:1983-02-17 00:00:00 Instrument:Neutral Atmosphere Composition Spectrometer (NACS) Resource:NumericalData
This data set contains, at 2-sec resolution, the neutral wind horizontal velocity, temperature and density from the Wind and Temperature Spectrometer (WATS) flown on DE 2. Data are available in ASCII from nssdcftp and in CDF format from CDAWeb (as well as CDAWeb plots and lists).

9) SNOE UVS (Ultraviolet Spectrometer) geographic coordinates maxmize
Resource ID:spase://VSPO/NumericalData/SNOE/UVS/GEO/PT1S
Start:1998-03-11 00:00:00 Observatory:Student Nitric Oxide Explorer (SNOE) Cadence:1 second
Stop:2000-09-30 23:59:59 Instrument:Student Nitric Oxide Explorer (SNOE) Ultraviolet Spectrometer (UVS) Resource:NumericalData
This set of SNOE UVS (Ultraviolet Spectrometer) data contains nitric oxide volume density translated from the spacecraft look angle through the atmosphere at the limb of Earth. Density data are provided from 100 to 150 km altitudes in 10 km intervals at the recorded geographic latitude and longitude (5-degree bins). Any data outages of size one (i.e. all adjacent neighbors contain valid data) in the dataset are filled in using linear interpolation in the altitude direction.

10) SNOE Daily Averages of Nitric Oxide (NO) Density in Geographic Bins maxmize
Resource ID:spase://VSPO/NumericalData/SNOE/UVS/GEO/PT24H
Start:1998-03-11 00:00:00 Observatory:Student Nitric Oxide Explorer (SNOE) Cadence:24 hours
Stop:2000-09-30 00:00:00 Instrument:Student Nitric Oxide Explorer (SNOE) Ultraviolet Spectrometer (UVS) Resource:NumericalData
This level 4 data set from the Student Nitric Oxide Explorer (SNOE) ultraviolet spectrometer (UVS) contains daily averages of nitric oxide (NO) density for the altitudes range 96.6 to 150 km as deduced from the UVS count rates ([0, 1] gamma band; 237 nm). Averaging was done in geographic coordinates in a 38x18 array, using bins of 5 degree latitude and 3.3 km altitude.

11) SNOE Orbital Averages of Nitric Oxide (NO) Density in Geographic Bins maxmize
Resource ID:spase://VSPO/NumericalData/SNOE/UVS/GEO/PT96M
Start:1998-03-11 00:00:00 Observatory:Student Nitric Oxide Explorer (SNOE) Cadence:96 minutes
Stop:2000-09-30 00:00:00 Instrument:Student Nitric Oxide Explorer (SNOE) Ultraviolet Spectrometer (UVS) Resource:NumericalData
This level 3 data set from the Student Nitric Oxide Explorer (SNOE) ultraviolet spectrometer (UVS) contains orbital averages of nitric oxide (NO) density for the altitudes range 96.6 to 150 km as deduced from the UVS count rates ([0, 1] gamma band; 237 nm). Averaging was done in geographic coordinates in a 38x20 array, using bins of 5 degree geographic latitude, 3.3 km altitude, and 24 degrees in geographic longitude.

12) SNOE UVS (Ultraviolet Spectrometer) geomagnetic coordinates maxmize
Resource ID:spase://VSPO/NumericalData/SNOE/UVS/MAG/PT1S
Start:1998-03-11 00:00:00 Observatory:Student Nitric Oxide Explorer (SNOE) Cadence:1 second
Stop:2000-09-30 23:59:59 Instrument:Student Nitric Oxide Explorer (SNOE) Ultraviolet Spectrometer (UVS) Resource:NumericalData
This set of SNOE UVS (Ultraviolet Spectrometer) data contains nitric oxide volume density translated from the spacecraft look angle through the atmosphere at the limb of Earth. Density data are provided from 100 to 150 km altitudes in 10 km intervals at the recorded geomagnetic latitude and longitude (5-degree bins). Any data outages of size one (i.e. all adjacent neighbors contain valid data) in the dataset are filled in using linear interpolation in the altitude direction.

13) SNOE Daily Averages of Nitric Oxide (NO) Density in Geomagnetic Bins maxmize
Resource ID:spase://VSPO/NumericalData/SNOE/UVS/MAG/PT24H
Start:1998-03-11 00:00:00 Observatory:Student Nitric Oxide Explorer (SNOE) Cadence:24 hours
Stop:2000-09-30 00:00:00 Instrument:Student Nitric Oxide Explorer (SNOE) Ultraviolet Spectrometer (UVS) Resource:NumericalData
This level 4 data set from the Student Nitric Oxide Explorer (SNOE) ultraviolet spectrometer (UVS) contains daily averages of nitric oxide (NO) density for the altitudes range 96.6 to 150 km as deduced from the UVS count rates ([0, 1] gamma band; 237 nm). Averaging was done in geomagnetic coordinates in a 38x18 array, using bins of 5 degree (geomagnetic) latitude and 3.3 km altitude.

14) SNOE Orbital Averages of Nitric Oxide (NO) Density in Geomagnetic Bins maxmize
Resource ID:spase://VSPO/NumericalData/SNOE/UVS/MAG/PT96M
Start:1998-03-11 00:00:00 Observatory:Student Nitric Oxide Explorer (SNOE) Cadence:96 minutes
Stop:2000-09-30 00:00:00 Instrument:Student Nitric Oxide Explorer (SNOE) Ultraviolet Spectrometer (UVS) Resource:NumericalData
This level 3 data set from the Student Nitric Oxide Explorer (SNOE) ultraviolet spectrometer (UVS) contains orbital averages of nitric oxide (NO) density for the altitudes range 96.6 to 150 km as deduced from the UVS count rates ([0, 1] gamma band; 237 nm). Averaging was done in geomagnetic coordinates in a 38x20 array, using bins of 5 degree geomagnetic latitude, 3.3 km altitude, and 24 degrees in longitude.

15) San Marco-DL Neutral Density Data at 1-s or 21-s maxmize
Resource ID:spase://VSPO/NumericalData/SanMarco-DL/DBI/PT1S
Start:1988-04-20 00:00:00 Observatory:San Marco-DL Cadence:1 second
Stop:1988-06-19 07:00:00 Instrument:Drag Balance Instrument Resource:NumericalData
This total neutral density data set from the San Marco D/L satellite Drag Balance Instrument (DBI) was provided by the PI team at the Centro Ricerche Aerospaziali in Rome, Italy. It contains the 1-second DBI data for the whole San Marco mission in ASCII format on CD (originally provide on 24 floppy diskettes). Each data file (file extension .D2) contains the time and the measured total density at that time for consecutive measurements. A new file is started any time there is a data gap of more than a few seconds. A corresponding file (.D1) contains information about the exact start and stop time of the specific measurement period, about the status of all experiments and other important information for the particular orbit, e.g., the Time of the Last Maneuver; this time parameter is important to sort out dynamically perturbed periods. Two high frequency filters and a filter for the satellite spin frequency were applied to clean the density data. Regular and irregular bias patterns were computed and recorded in the D1 files. 21-second averages of these data are generated using the PI-provided software to generate orbit parameters. The data are in ASCII format and each data record includes the date, time, total density, error, altitude, latitude, longitude, and local solar time. Further details about the San Marco spacecraft, experiment, and data sets can be found at the San Marco home page, http://crpsm.psm.uniroma1.it/

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