| 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.
|
