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Spacecraft Yaw Maneuvers
A yaw maneuver is a periodic event that needs to be performed on the spacecraft. The spacecraft precesses its orbit approximately 3° per day with respect to the Sun. After about 60 days, the Sun has traveled a full 180°. Eventually the spacecraft must perform a maneuver to allow the Sun to continue to travel on the hot side of the spacecraft. This maneuver is a 180° yaw of the spacecraft along the nadir line. The yaw maneuver is conducted near an orbit where the
solar beta angle (the elevation of the Sun in the orbit plane) becomes zero. It also is conducted in shadow to prevent inadvertent sunlight from shining on the cold side of the spacecraft during the maneuver.
Times of all TIMED Yaw Maneuvers
Year,
DOY,
time (UTC)
2001, 355, 12:58-13:28
2002, 014, 17:42-18:12
2002, 078, 14:35-15:05
2002, 142, 17:27-18:07
2002, 197, 17:03-17:43
2002, 262, 18:16-18:56
2002, 325, 15:16-15:56
2003, 015, 17:32-18:12
2003, 078, 17:24-18:04
2003, 142, 15:46-16:04
2003, 198, 14:40-15:20
2003, 262, 16:07-16:47
2003, 325, 15:34-15:52
2004, 015, 17:11-17:28
2004, 078, 16:25-16:55
2004, 142, 15:51-16:11
2004, 197, 15:39-16:03
2004, 263, 13:58-14:21
2004, 324, 14:01-14:21
2005, 014, 17:12-17:35
2005, 077, 16:06-16:23
2005, 140, 16:34-16:48
2005, 196, 16:22
2005, 261, 15:43-16:03
2005, 323, 15:48-16:04
2006, 013, 16:54-17:15
2006, 076, 15:36-15:50
2006, 139, 17:29-17:46
2006, 195, 15:33-15:48
2006, 261, 16:38-17:01
2006, 324, 15:14-15:28
2007, 012, 17:16-17:36
2007, 075, 15:51-16:21
2007, 140, 16:33-16:48
2007, 196, 16:06-16:41
2007, 260, 16:32-16:52
2007, 323,~13:24-13:54
2008, 075, 14:05-14:45
2008, 140, 16:18-16:58
2008, 195, 15:32-16:12
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