BLACKOUT PERIODS for ERS-1 Phase C orbits. The Table is based on the radial orbit difference between DUT DGM-E04 and UT/CSR TEG3 orbits. When the Rms radial orbit difference per orbital revolution is more than 9 cm, the orbits are considered BAD. This is mainly correlated with: - Insufficient SLR or altimeter tracking data - Orbital maneuvers The Table lists the periods of BAD orbits in absolute orbit number, seconds of 1985, and YYMMDD HH:MM:SS. Exclamation marks at the end indicate ! Rms difference more than 20 cm !! Rms difference more than 100 cm The total rms radial orbit difference outside the listed blackout periods is 3.7 cm. - Abs Orb Nr - ------- Sec 85 ----- ------------ Date -------------- 3960 3989 230202800 230383878 920418 9:13:20 920420 11:31:18 ! 4013 4013 230522704 230528740 920422 2:05:04 920422 3:45:40 4043 4043 230703782 230709818 920424 4:23:02 920424 6:03:38 4096 4096 231023686 231029722 920427 21:14:46 920427 22:55:22 !! 4273 4292 232092045 232212764 920510 6:00:45 920511 15:32:44 ! 4442 4443 233112117 233124189 920522 1:21:57 920522 4:43:09 !! 4646 4656 234343446 234409842 920605 7:24:06 920606 1:50:42 ! 4742 4783 234922896 235176405 920612 0:21:36 920614 22:46:45 ! 4942 4947 236130081 236166297 920625 23:41:21 920626 9:44:57 ! 5013 5013 236558632 236564668 920630 22:43:52 920701 0:24:28 !! 5276 5320 238146081 238417698 920719 7:41:21 920722 11:08:18 !! 5342 5342 238544452 238550488 920723 22:20:52 920724 0:01:28 !! 5924 5943 242057363 242178081 920902 14:09:23 920903 23:41:21 !! 6245 6246 243994896 244006967 920925 0:21:36 920925 3:42:47 !! 6312 6312 244399303 244405339 920929 16:41:43 920929 18:22:19 6505 6505 245564237 245570273 921013 4:17:17 921013 5:57:53 6678 6684 246608452 246650704 921025 6:20:52 921025 18:05:04 6877 6881 247809602 247839782 921108 4:00:02 921108 12:23:02 6895 6895 247918249 247924285 921109 10:10:49 921109 11:51:25 7079 7079 249028860 249034896 921122 6:41:00 921122 8:21:36 7086 7087 249071111 249083183 921122 18:25:11 921122 21:46:23 7357 7357 250706848 250712884 921211 16:47:28 921211 18:28:04 7361 7361 250730991 250737027 921211 23:29:51 921212 1:10:27 7426 7436 251123327 251189722 921216 12:28:47 921217 6:55:22 !! 7443 7443 251225937 251231973 921217 16:58:57 921217 18:39:33 7450 7453 251268189 251292333 921218 4:43:09 921218 11:25:33 7565 7565 251962321 251968357 921226 5:32:01 921226 7:12:37 7592 7594 252125291 252143399 921228 2:48:11 921228 7:49:59 8191 8191 255740812 255746848 930207 23:06:52 930208 0:47:28 8199 8200 255789099 255801171 930208 12:31:39 930208 15:52:51 8213 8213 255873602 255879638 930209 12:00:02 930209 13:40:38 8607 8610 258251758 258275902 930309 0:35:58 930309 7:18:22 9107 9107 261269722 261275758 930412 22:55:22 930413 0:35:58 9415 9417 263128788 263146896 930504 11:19:48 930504 16:21:36 ! 9424 9425 263183111 263195183 930505 2:25:11 930505 5:46:23 !! 10238 10238 268096357 268102393 930630 23:12:37 930701 0:53:13 !! 12453 12453 281465937 281471973 931202 16:58:57 931202 18:39:33 12725 12726 283107710 283119782 931221 17:01:50 931221 20:23:02 12752 12752 283270680 283276716 931223 14:18:00 931223 15:58:36 !