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CERES-TRMM Table of Operations


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Image: Previous Month August 1998 Image: Next Month
Day
of
Month
Day
of
Year
Scan Mode Beta
Angle,
deg
Calibrations, UT Special Operations/Comments
Internal Solar
Cross
Track
Unrestricted
Biaxial
Restricted
Biaxial
Sunrise Sunset
1213X----39------ Orbit Adjustment (Delta V maneuvers)
2214X----35------ 
3215--X--30------ Verified spacecraft position predictions near DOE ARM site in Oklahoma.
4216X----25------ 
5217X----21------ 
6218----*Alongtrack16------ Sun-avoidance commands required. UTCF value adjusted. New UTCF = 31535997.881288 seconds
7219X----12------ 
8220X----7------ Orbit Adjustment (Delta V maneuvers)
9221----X3------ Spacecraft yaw maneuver - 21:10:54, +X axis to -X axis forward. X-track operation from 21:56 to 22:56 UT near DOE ARM site in Oklahoma.
10222X-----2------ Beta changed (+ to - values)
11223X-----6------ 
12224----X-915:25:0013:30:50-- X-track operation from 21:30 to 22:30 UT near DOE ARM site in Oklahoma. UTCF value adjusted. New UTCF = 31535997.880443 seconds
13225X-----12------ 
14226X-----15------ 
15227----X-18------ Orbit Adjustment (Delta V maneuvers)
X-track operation from 19:40 to 20:30 UT near DOE ARM site in Oklahoma
16228X-----20------ 
17229X-----21------ 
18230--X---22------ X-track operation from 17:45 to 19:45 UT near DOE ARM site in Oklahoma.
19231X-----22------ Minimum Beta Angle for the cycle
20232X-----22------ 
21233----*Alongtrack-21------ Sun-avoidance commands required. Orbit Adjustment (Delta V maneuvers)
X-track operation from 15:50 to 17:41 UT near DOE ARM site in Oklahoma.
22234X-----19------ 
23235X-----17------ UTCF value adjusted. New UTCF = 31535997.879569 seconds
24236----X-14------ X-track operation from 13:35 to 15:55 UT near DOE ARM site in Oklahoma. Last day in biaxial scan mode following onset of DAA + 15-volt anomaly.
25237X-----11------ Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 12:00 - 15:00 UT.
26238X-----8------ Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 12:00 - 14:00 UT.
27239X-----4------ Orbit Adjustment (Delta V maneuvers)
In cross-track scan mode because of DAA + 15-volt anomaly. Values exceeded 16.0 volts during orbits between 11:00 - 14:00 UT.
28240X----0------ Spacecraft yaw maneuver - 7:07:09, -X axis to +X axis forward. New elevation scan profile uploaded and tested. Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 11:00 - 19:00 UT.
29241X----4------ Values of DAA + 15-volt measurement exceeded 16.0 volts during orbits between 09:00 - 21:00 UT.
30242X----8------ In cross-track mode because of DAA + 15-volt anomaly. Values exceeded 16.0 volts during orbits between 10:00 and 20:00 UT. Azimuth gimbal rotated to 5.0 deg at 19:08:57 UT.
31243------12------ Azimuth = 5.0 degs, Normal Earth scan till 11:24:46 when instrument commanded to safe. Commanded to Normal Earth scan at 21:42:38. SWICS set to level 3 at 21:45:49.
 
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