4/29/2015     C. Acton

Per Bob Jacobson directions, the data for 634 (Polydeuces) comes from the earlier
satellite ephemeris file named SAT363; the ephemeris for 634 is unchanged.

Consequently, SAT378 is being re-made as of this date to make this addition. Otherwise
this SPK collection would NOT contain data for 634.



                     Satellite Ephemeris File Release


Satellite Ephemeris: SAT378

Location: ssd.jpl.nasa.gov/pub/eph/satellites/nio/LINUX_PC/sat378.nio

Enter SATEPHMERGE/15 22-Apr-2015 11:00:16.327 linked 29-Jul-2014 09:56:46
Fit to Earth-based, HST, Voyager, and Cassini data
Earthbased, Voyager, HST, and Cassini observations - SAT378
Ephemeris Version Number: 20
Timespan from JED  2433276.500(26-DEC-1949) to JED  2469816.500(10-JAN-2050)
File Epoch Julian Date: 2453022.50
Master Interval: 18.0000 Days
Equinox Reference Julian Date: 2451545.00
Planetary Ephemeris Number: DE-0431/LE-0431

Bodies on the File:

   Name         Number            GM             NDIV   NDEG   Model
   Janus          610    1.265862746088717E-01     48     15   SATORBINT
   Epimetheus     611    3.512884982131578E-02     48     15   SATORBINT
   Atlas          615    3.720785553453299E-04     48     15   SATORBINT
   Prometheus     616    1.066792953546067E-02     48     15   SATORBINT
   Pandora        617    9.150117647500774E-03     48     15   SATORBINT
   Methone        632    0.000000000000000E+00     24     12   SATORBINT
   Pallene        633    0.000000000000000E+00     24     15   SATORBINT
   Anthe          649    0.000000000000000E+00     24     15   SATORBINT
   Aegaeon        653    0.000000000000000E+00     24     15   SATORBINT
   Saturn         699    3.793120720330278E+07     12     12   SATORBINT
   System                3.794058494019786E+07

Additional Constants on the File:

  AU         1.495978707000000E+08   601GM      2.503484030511359E+00
  RADIUS     6.033000000000000E+04   J602       1.629069546359586E-02
  J603       9.999999999999999E-21   J604      -9.343510777884500E-04
  J606       8.959557103488101E-05   J608      -1.000000000000000E-05
  POLTIM     2.451545000000000E+06   ZACPL6     4.058270059425521E+01
  ZDEPL6     8.353764728831548E+01   DACPL6    -5.808556328862353E-02
  DDEPL6    -6.858357034897291E-03   WPL6       3.890000000000000E+01
  WDP6       8.107939023840765E+02   607GM      3.718562949332045E-01
  609GM      5.529278065380264E-01   602GM      7.211140136327307E+00
  603GM      4.121081982358982E+01   604GM      7.311672244985478E+01
  608GM      1.205073858074352E+02   605GM      1.539427790613676E+02
  606GM      8.978137874424849E+03   GM7        5.794556400000000E+06
  GM8        6.836527100580000E+06   GM5        1.267127641000000E+08
  GM10       1.327132332639221E+11   RA_AMPL1   3.394578618432000E-02
  RA_FAZE1   3.362827860448000E+02   RA_FREQ1   5.109270184845000E+01
  RA_AMPL2   2.194615419925000E-03   RA_FAZE2   3.393234943155000E+01
  RA_FREQ2   1.046981232614000E+01   RA_AMPL3   1.296857669242000E-02
  RA_FAZE3   1.065902989076000E+02   RA_FREQ3   0.000000000000000E+00
  DE_AMPL1   3.820609911629000E-03   DE_FAZE1   3.362827860448000E+02
  DE_FREQ1   5.109270184845000E+01   DE_AMPL2   2.470047204107000E-04
  DE_FAZE2   3.393234943155000E+01   DE_FREQ2   1.046981232614000E+01
  DE_AMPL3   1.296857669242000E-02   DE_FAZE3   1.065902989076000E+02
  DE_FREQ3   0.000000000000000E+00   W_AMPL1   -3.373009545754000E-02
  W_FAZE1    3.362827860448000E+02   W_FREQ1    5.109270184845000E+01
  W_AMPL2   -2.180670885179000E-03   W_FAZE2    3.393234943155000E+01
  W_FREQ2    1.046981232614000E+01   W_AMPL3   -1.288617466122000E-02
  W_FAZE3    1.065902989076000E+02   W_FREQ3    0.000000000000000E+00


Chebyshev interpolation error:  5.800 meters

Release to: Cassini/Horizons/Naif              Time: 22-Apr-2015 11:07:40

Preparer: R. A. Jacobson

Comments:
Update of the small Saturnian satellite ephemeris. More Cassini observations
of Aegaeon, revised dynamical model to include Mimas - Pandora interactions.