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CERES-TRMM Table of Operations


The following tables identify key operations during each day of the month and contain:

  • Day of the month and day of the year.

  • The primary scan mode for each day:
    • Cross Track - elevation scan plane normal to the orbit plane
    • Along Track - Azimuth plane coincident with orbit plane during elevation scanning.
    • Unrestricted Biaxial - Azimuth plane rotates back and forth through 180 degrees during elevation scanning
    • Restricted Biaxial - Azimuth plane rotation restricted when solar beta angle less than 20 degrees

  • Beta Angle - the angle between Sun vector and orbit plane calculated at noon Universal Time [UT]. Values are positive when the Sun is on left side of orbit, looking down range. Total range of values for TRMM orbit is -58.5 to +58.5 degrees.

  • Calibration time in hours, and minutes, UT.
    • Internal calibrations with the blackbody and shortwave sources.
    • Solar calibrations with the Mirror Attenuator Mosaic at either sunrise or sunset.

  • Special operations such as the periodic yaw maneuver required to keep the Sun on the solar panels.

1997
  December
           
1998
January February March April May June
July August September October November December
           
1999
January February March April May June
July August September October November December
           
2000
January February March April May June
July August September October November December
           
2001
January February March April May  
           


 
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