UARS Yaw Maneuver History DOY UARS Day Date Direction Orbit Start time End Time --- -------- ---- --------- ----- ---------- -------- 97201 2139 20-JUL-1997 BACK to FORW 32000 201/13:56:36 14:33:46 97171 2109 20-JUN-1997 FORW to BACK 31552 171/15:10:55 15:48:05 97129 2067 09-MAY-1997 BACK to FORW 30922 129/13:47:46 14:24:58 97096 2034 06-APR-1997 FORW TO BACK 30428 096/13:10:47 13:47:57 97060 1998 01-MAR-1997 BACK TO FORW 29889 060/13:54:18 14:31:28 97020 1958 20-JAN-1997 FORW to BACK 29291 020/14:16:23 14:53:33 96357 1929 22-DEC-1996 BACK to FORW 28856 357/13:56:44 14:33:54 96316 1888 11-NOV-1996 FORW to BACK 28243 316/14:11:12 14:48:22 96283 1855 09-OCT-1996 BACK to FORW 27748 283/13:33:07 14:10:17 96246 1818 02-SEP-1996 FORW to BACK 27195 246/14:11:40 14:48:50 96206 1778 24-JUL-1996 BACK to FORW 26596 206/14:32:49 15:09:59 96176 1748 24-JUN-1996 FORW to BACK 26147 176/14:08:30 14:45:40 96135 1707 14-MAY-1996 BACK to FORW 25533 135/14:21:43 14:58:53 96102 1674 11-APR-1996 FORW to BACK 25039 102/13:42:53 14:16:33 96065 1637 05-MAR-1996 BACK to FORW 24486 065/15:55:25 16:32:35 96026 1598 26-JAN-1996 FORW to BACK 23902 026/14:42:20 15:19:30 95361 1568 27-DEC-1995 BACK to FORW 23452 361/14:16:20 14:53:30 95320 1527 16-NOV-1995 FORW to BACK 22839 320/14:26:54 15:04:04 95288 1495 15-OCT-1995 BACK to FORW 22359 288/13:49:56 14:27:06 95251 1458 08-SEP-1995 FORW to BACK 21806 251/14:23:41 15:00:51 95211 1418 30-JUL-1995 BACK to FORW 21207 211/14:41:10 15:14:50 95181 1388 30-JUN-1995 FORW to BACK 20758 181/14:13:11 14:50:21 95139 1346 19-MAY-1995 BACK to FORW 20131 139/17:30:12 18:07:22 95107 1314 17-APR-1995 FORW to BACK 19652 107/16:51:40 17:25:20 95070 1277 11-MAR-1995 BACK to FORW 19098 070/17:22:19 17:59:29 95030 1237 30-JAN-1995 FORW to BACK 18499 030/16:00:43 16:37:53 94365 1207 31-DEC-1994 BACK to FORW 18051 365/18:42:16 19:19:26 94324 1166 20-NOV-1994 FORW to BACK 17436 324/15:33:19 16:10:29 94293 1135 20-OCT-1994 BACK to FORW 16972 293/16:31:22 17:08:32 94255 1097 12-SEP-1994 FORW to BACK 16403 255/15:26:29 16:03:39 94216 1058 04-AUG-1994 BACK to FORW 15820 216/17:27:42 18:04:52 94185 1027 04-JUL-1994 FORW to BACK 15355 185/15:22:27 15:59:37 94143 985 23-MAY-1994 BACK to FORW 14743 143/18:43:08 19:20:18 94112 954 22-APR-1994 FORW to BACK 14262 112/14:59:51 15:33:31 94075 917 16-MAR-1994 BACK to FORW 13709 075/17:09:04 17:46:14 94035 877 04-FEB-1994 FORW to BACK 13110 035/15:51:05 16:28:15 94005 847 05-JAN-1994 BACK to FORW 12611 005/16:56:18 17:33:28 93329 806 25-NOV-1993 FORW to BACK 12046 329/13:46:46 14:23:56 93297 774 24-OCT-1993 BACK to FORW 11568 297/16:16:01 16:53:11 93260 737 17-SEP-1993 FORW to BACK 11013 260/13:26:51 14:04:01 93220 697 08-AUG-1993 BACK to FORW 10413 220/11:58:26 12:35:26 93189 666 08-JUL-1993 FORW to BACK 9952 189/16:25:34 17:02:44 93148 625 28-MAY-1993 BACK to FORW 9338 148/16:45:16 17:22:26 93116 593 26-APR-1993 FORW to BACK 8859 116/16:16:46 16:53:56 93078 555 19-MAR-1993 BACK to FORW 8288 078/13:37:35 14:11:15 93040 517 09-FEB-1993 FORW to BACK 7720 040/14:13:07 14:50:17 93009 486 09-JAN-1993 BACK to FORW 7255 009/13:44:59 14:18:39 92334 445 29-NOV-1992 FORW to BACK 6642 334/14:03:55 14:37:35 92303 414 29-OCT-1992 BACK to FORW 6179 303/15:56:00 16:29:40 92265 376 21-SEP-1992 FORW to BACK 5608 265/12:26:44 13:00:24 92226 337 13-AUG-1992 BACK to FORW 5024 226/12:47:28 13:21:08 92195 306 13-JUL-1992 FORW to BACK 4560 195/12:11:32 12:45:12 92153 264 01-JUN-1992 BACK to FORW 3931 153/12:09:53 12:45:03 92122 233 01-MAY-1992 FORW to BACK 3468 122/13:16:07 13:49:47 92083 194 23-MAR-1992 BACK to FORW 2885 083/13:35:05 14:08:45 92045 156 14-FEB-1992 FORW to BACK 2316 045/14:17:50 14:51:30 92014 125 14-JAN-1992 BACK to FORW 1852 014/13:44:53 14:18:33 91338 084 04-DEC-1991 FORW to BACK 1237 338/12:33:33 13:07:13 91307 053 03-NOV-1991 BACK to FORW 774 307/13:41:24 14:15:04 91269 015 26-SEP-1991 FORW to BACK 197 269/01:21:56 01:55:36 Yaw maneuver duration = 33.6667 minutes (33:40). End time was determined by adding 33 min 40 sec to start time. NOTE: Flying FORWARD = COLD SIDE LOOKING SOUTH UARS PREDICTED YAW MANEUVER DATES ----------------------------------- PREDICTED MAX SOLAR BETA YAW MANEUVER DATES OCCURRENCE ------------------ ---------- DAY DATE DIRECTION DAY DATE BETA ---------------------------------- ----------------------------- 96316 11-NOV-1996 FORW TO BACK 96336 1-DEC-1996 -78.79 96357 22-DEC-1996 BACK TO FORW 97006 6-JAN-1997 34.51 97020 20-JAN-1997 FORW TO BACK 97041 10-FEB-1997 -71.22 97060 1-MAR-1997 BACK TO FORW 97078 19-MAR-1997 56.52 97096 6-APR-1997 FORW TO BACK 97113 23-APR-1997 -44.06 97130 10-MAY-1997 BACK TO FORW 97150 30-MAY-1997 78.78 97171 20-JUN-1997 FORW TO BACK 97186 5-JUL-1997 -34.25 97201 20-JUL-1997 BACK TO FORW 97222 10-AUG-1997 72.46 97241 29-AUG-1997 FORW TO BACK 97259 16-SEP-1997 -54.41 97277 4-OCT-1997 BACK TO FORW 97294 21-OCT-1997 45.89 97311 7-NOV-1997 FORW TO BACK 97331 27-NOV-1997 -78.18 97352 18-DEC-1997 BACK TO FORW 98001 1-JAN-1998 34.00 98016 16-JAN-1998 FORW TO BACK Source: UMPG::CMS$DISK:[CMS_MPG.ODB]UA214OP1.ODB (18-month Orbit Parameter Profile, 7 August 1996)