SatTrack V4.8 Shadow Analysis


Input file:

  Shadow.THEMIS_A


Object:

  Object Name       : THEMIS A
  Object Number     : 99001
  Element Set Number: 0
  Reference Orbit   : 0
  Element Set Epoch : N/A
  Element Set Age   : N/A
  Launch Date/Time  : 17-Feb-2007  2007/048  23:01:00.000 UTC
  Orbit Geometry    : 68408.113 km x 3214.051 km at 9.444 deg
  Avrg Nodal Period : 1437.580 min
  Propagation Model : External Ephemeris


Shadow Statistics:

  Begin of Analysis Interval  : 13-Feb-2009  2009/044  00:00:00 UTC
  End of Analysis Interval    : 01-Apr-2009  2009/091  11:59:55 UTC
  Total Time Interval         : 47.500 d
  Time Resolution             : 30.000 s
  Shadow Entry/Exit Condition : 99.0 % of Full Sunlight
  Number of Shadow Periods    : 5
  Shortest Gap Between Shadows: 1304.500 min
  Longest Gap Between Shadows : 1370.000 min


  Shortest Penumbra   Longest Penumbra   Average Penumbra   Total Penumbra   Fraction of Analysis Interval
         [min]              [min]              [min]              [min]                  [%]

           0.0               61.0               32.1              160.5                  0.2


    Shortest Umbra      Longest Umbra      Average Umbra      Total Umbra    Fraction of Analysis Interval
         [min]              [min]              [min]              [min]                  [%]

           0.0              116.5               58.3              291.5                  0.4


   Shortest Shadow     Longest Shadow     Average Shadow     Total Shadow    Fraction of Analysis Interval
         [min]              [min]              [min]              [min]                  [%]

          30.5              139.0               90.4              452.0                  0.7


Shadow Periods:

     Shadow Begin    -       Shadow End          Entry Penumbra   Exit Penumbra   Total Penumbra     Total Umbra     Total Shadow      Depth

  2009/087 11:35:30  -  2009/087 12:36:30  UTC       61.0 min         0.0 min         61.0 min           0.0 min         61.0 min       55.6 %
  2009/088 11:26:30  -  2009/088 13:05:30  UTC       20.5 min        18.5 min         39.0 min          60.0 min         99.0 min      100.0 %
  2009/089 11:24:30  -  2009/089 13:27:00  UTC       14.5 min        13.0 min         27.5 min          95.0 min        122.5 min      100.0 %
  2009/090 11:25:30  -  2009/090 13:44:30  UTC       12.5 min        10.0 min         22.5 min         116.5 min        139.0 min      100.0 %
  2009/091 11:29:00  -  2009/091 11:59:30  UTC       10.5 min         0.0 min         10.5 min          20.0 min         30.5 min      100.0 %