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1) CRRES Ephemeris Information maxmize
Resource ID:spase://VMO/NumericalData/CRRES/Ephemeris/PT5M
Start:1990-10-11 00:00:00 Observatory:CRRES Cadence:5 minutes
Stop:1991-10-13 00:00:00 Instrument:CRRES Spacecraft Position Resource:NumericalData
This data set contains orbital information from the CRRES spacecraft. The ephemeris data is at 5 min resolution. The files include the magnetic coordinates, spacecraft radial locaton, the L shell information, the spacecraft position in ECI coordinates, and the northern and southern hemisphere foot print location in geographic latitutde and longitude coordinates at 100 km in altitude.

2) 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:2014-12-19 01:02:32 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.

3) Double Star 1 Spacecraft Auxiliary Summary Parameters Data maxmize
Resource ID:spase://VMO/NumericalData/DoubleStar1/Ephemeris/SummaryParameters/60S
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.

4) Double Star 2 Spacecraft Auxiliary Summary Parameters Data maxmize
Resource ID:spase://VMO/NumericalData/DoubleStar2/Ephemeris/SummaryParameters/60S
Start:2004-07-27 00:00:30 Observatory:Double Star 2 Cadence:60 seconds
Stop:2008-06-30 23:59:30 Instrument:Double Star 2 Spacecraft Position Resource:NumericalData
The Double Star 2 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) All GOES Longitudinal Locations at 1 Day Resolution as West Geographic longitude. maxmize
Resource ID:spase://VMO/NumericalData/GOES/Ephemeris/PD1
Start:1986-01-01 00:00:00 Observatory:GOES 2 Cadence:31 days
Stop:2010-02-28 00:00:00 Instrument:GOES 2 Positions Resource:NumericalData
The GOES longitudinal location information consists of the west geographic longitude in degrees. The data are separated into spacecraft (GOES 2-12), year, and month. The location is given for each day of the month is in units of degrees and the geographic latitude is assumed to be zero degrees.

8) Geotail Spacecraft Definitive Positions maxmize
Resource ID:spase://VMO/NumericalData/Geotail/Ephemeris/PT10M
Start:1992-07-27 16:00:00 Observatory:Geotail Cadence:10 minutes
Stop:2014-12-19 01:02:55 Instrument:Geotail Spacecraft Position Resource:NumericalData
Definitive Geotail spacecraft positions in various coordinate systems

9) IMP 8 Spacecraft Positions maxmize
Resource ID:spase://VMO/NumericalData/IMP8/Ephemeris/PT12M
Start:1973-10-30 00:00:00 Observatory:IMP 8 Cadence:12 minutes
Stop:2014-12-19 01:02:56 Instrument:IMP 8 Spacecraft Position Resource:NumericalData
IMP-8 spacecraft positions in various coordinate systems

10) 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.

11) Interball Tail definitive orbital data maxmize
Resource ID:spase://VMO/NumericalData/Interball-Tail/Ephemeris/PT2M
Start:1995-08-07 00:00:00 Observatory:Interball-1 Cadence:2 minutes
Stop:2000-10-16 13:55:00 Instrument:Interball-1 Orbit Resource:NumericalData
Definitive Interball Tail satellite and subsatellite (Interball-1 and Magion-4) orbital data: Spacecraft position, velocity, and status flags.

12) 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:2014-12-19 01:03:31 Instrument:POLAR Orbit Resource:NumericalData
Polar predicted orbit data

13) 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:2014-12-18 01:00:45 Instrument:Pioneer10 Positions Resource:NumericalData
Pioneer10 satellite positions.

14) 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:2014-12-18 01:00:44 Instrument:Pioneer11 Positions Resource:NumericalData
Pioneer11 satellite positions.

15) SCATHA Spacecraft Positions maxmize
Resource ID:spase://VMO/NumericalData/SCATHA/Ephemeris/PT1M
Start:1979-02-06 00:00:00 Observatory:SCATHA Cadence:1 minute
Stop:1986-12-31 23:59:00 Instrument:SCATHA Positions Resource:NumericalData
SCATHA satellite positions.

16) THEMIS-A Level 1 Probe State Data maxmize
Resource ID:spase://VMO/NumericalData/THEMIS/A/Ephemeris/PT01M
Start:2007-02-17 23:35:58 Observatory:THEMIS-A Cadence:01 minutes
Stop:2014-12-19 01:02:52 Instrument:THEMIS-A Probe Status Resource:NumericalData
The L1 STATE files contain the following data, sampled at one-minute intervals: * probe position and velocity in GEI, GSE, and GSM coordinates; * flags to indicate regions of interest and maneuver status; * RA and declination of spin axis; * spin period and spin phase; * spin model parameters for high-precision interpolation of spin phase between one-minute data points. Version number indicates data source as follows: * V00: predicted ephemeris and attitude, no spin period or spin phase; * V01: predicted ephemeris and attitude, spin period and spin phase derived from probe telemetry; * V02: predicted attitude, definitive ephemeris from magnetometer and Doppler tracking data; * V03: corrected attitude and spin phase derived from fully calibrated magnetometer data (added science attitude determination using perigee data post-processing). Produced by Mission Ops, Science Ops and Science Team.

17) THEMIS-B Level 1 Probe State Data maxmize
Resource ID:spase://VMO/NumericalData/THEMIS/B/Ephemeris/PT01M
Start:2007-02-17 23:35:58 Observatory:THEMIS-B Cadence:01 minutes
Stop:2014-12-19 01:02:48 Instrument:THEMIS-B Probe Status Resource:NumericalData
The L1 STATE files contain the following data, sampled at one-minute intervals: * probe position and velocity in GEI, GSE, and GSM coordinates; * flags to indicate regions of interest and maneuver status; * RA and declination of spin axis; * spin period and spin phase; * spin model parameters for high-precision interpolation of spin phase between one-minute data points. Version number indicates data source as follows: * V00: predicted ephemeris and attitude, no spin period or spin phase; * V01: predicted ephemeris and attitude, spin period and spin phase derived from probe telemetry; * V02: predicted attitude, definitive ephemeris from magnetometer and Doppler tracking data; * V03: corrected attitude and spin phase derived from fully calibrated magnetometer data. (added science attitude determination using perigee data post-processing). Produced by Mission Ops, Science Ops and Science Team.

18) THEMIS-C Level 1 Probe State Data maxmize
Resource ID:spase://VMO/NumericalData/THEMIS/C/Ephemeris/PT01M
Start:2007-02-17 23:35:58 Observatory:THEMIS-C Cadence:01 minutes
Stop:2014-12-19 01:02:44 Instrument:THEMIS-C Probe Status Resource:NumericalData
The L1 STATE files contain the following data, sampled at one-minute intervals: * probe position and velocity in GEI, GSE, and GSM coordinates; * flags to indicate regions of interest and maneuver status; * RA and declination of spin axis; * spin period and spin phase; * spin model parameters for high-precision interpolation of spin phase between one-minute data points. Version number indicates data source as follows: * V00: predicted ephemeris and attitude, no spin period or spin phase; * V01: predicted ephemeris and attitude, spin period and spin phase derived from probe telemetry; * V02: predicted attitude, definitive ephemeris from magnetometer and Doppler tracking data; * V03: corrected attitude and spin phase derived from fully calibrated magnetometer data. (added science attitude determination using perigee data post-processing). Produced by Mission Ops, Science Ops and Science Team.

19) THEMIS-D Level 1 Probe State Data maxmize
Resource ID:spase://VMO/NumericalData/THEMIS/D/Ephemeris/PT01M
Start:2007-02-17 23:35:58 Observatory:THEMIS-D Cadence:01 minutes
Stop:2014-12-19 01:02:37 Instrument:THEMIS-D Probe Status Resource:NumericalData
The L1 STATE files contain the following data, sampled at one-minute intervals: * probe position and velocity in GEI, GSE, and GSM coordinates; * flags to indicate regions of interest and maneuver status; * RA and declination of spin axis; * spin period and spin phase; * spin model parameters for high-precision interpolation of spin phase between one-minute data points. Version number indicates data source as follows: * V00: predicted ephemeris and attitude, no spin period or spin phase; * V01: predicted ephemeris and attitude, spin period and spin phase derived from probe telemetry; * V02: predicted attitude, definitive ephemeris from magnetometer and Doppler tracking data; * V03: corrected attitude and spin phase derived from fully calibrated magnetometer data. (added science attitude determination using perigee data post-processing). Produced by Mission Ops, Science Ops and Science Team.

20) THEMIS-E Level 1 Probe State Data maxmize
Resource ID:spase://VMO/NumericalData/THEMIS/E/Ephemeris/PT01M
Start:2007-02-17 23:35:58 Observatory:THEMIS-E Cadence:01 minutes
Stop:2014-12-19 01:02:34 Instrument:THEMIS-E Probe Status Resource:NumericalData
The L1 STATE files contain the following data, sampled at one-minute intervals: * probe position and velocity in GEI, GSE, and GSM coordinates; * flags to indicate regions of interest and maneuver status; * RA and declination of spin axis; * spin period and spin phase; * spin model parameters for high-precision interpolation of spin phase between one-minute data points. Version number indicates data source as follows: * V00: predicted ephemeris and attitude, no spin period or spin phase; * V01: predicted ephemeris and attitude, spin period and spin phase derived from probe telemetry; * V02: predicted attitude, definitive ephemeris from magnetometer and Doppler tracking data; * V03: corrected attitude and spin phase derived from fully calibrated magnetometer data. (added science attitude determination using perigee data post-processing). Produced by Mission Ops, Science Ops and Science Team.

21) 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:2014-12-19 01:02:31 Instrument:TWINS 1 Positions Resource:NumericalData
Definitive orbit data

22) TWINS 2 - Spacecraft Ephemeris maxmize
Resource ID:spase://VMO/NumericalData/TWINS2/Ephemeris/PT1M45S
Start:2001-04-11 00:03:22 Observatory:TWINS 2 Cadence:1 minute; 45 seconds
Stop:2014-12-19 01:03:07 Instrument:TWINS 2 Positions Resource:NumericalData
Definitive orbit data

23) 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.

24) 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

25) 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

26) 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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