|
| UARS Mission Days |
Full Dates |
Year-DOY |
Reason |
| 84 to 91 |
1991-12-04 to 1991-12-11 |
1991-338 to 1991-345 |
Bad HRDI programming. |
| 95 to 96 |
1991-12-15 to 1991-12-16 |
1991-349 to 1991-350 |
Mode stack overflow - computer down |
| 118 to 118 |
1992-01-07 to 1992-01-07 |
1992-007 to 1992-007 |
Bad HRDI programming. |
| 201 to 226 |
1992-03-30 to 1992-04-24 |
1992-090 to 1992-115 |
Hardware problem - MRE post 2 partial failure. |
| 252 to 252 |
1992-05-20 to 1992-05-20 |
1992-141 to 1992-141 |
Bad HRDI programming. |
| 510 to 513 |
1993-02-02 to 1993-02-05 |
1993-033 to 1993-036 |
Hardware problem - MRE post 1 partial failure. |
| 583 to 583 |
1993-04-16 to 1993-04-16 |
1993-106 to 1993-106 |
Bad UARS alignment - horizon sensor failed |
| 1058 to 1058 |
1994-08-04 to 1994-08-04 |
1994-216 to 1994-216 |
Bad HRDI programming - attempted potassium measurement |
| 1092 to 1093 |
1994-09-07 to 1994-09-08 |
1994-250 to 1994-251 |
Bad UARS alignment. |
| 1134 to 1134 |
1994-10-19 to 1994-10-19 |
1994-292 to 1994-292 |
Bad UARS alignment. |
| 1166 to 1166 |
1994-11-20 to 1994-11-20 |
1994-324 to 1994-324 |
Bad HRDI programming - attempted potassium measurement |
| 1207 to 1207 |
1994-12-31 to 1994-12-31 |
1994-365 to 1994-365 |
Bad HRDI programming - attempted potassium measurement |
| 1237 to 1237 |
1995-01-30 to 1995-01-30 |
1995-030 to 1995-030 |
Bad HRDI programming - potassium measurement. |
| 1480 to 1483 |
1995-09-30 to 1995-10-03 |
1995-273 to 1995-276 |
Bad instrument coefficients. |
| 1507 to 1507 |
1995-10-27 to 1995-10-27 |
1995-300 to 1995-300 |
Bad HRDI programming. |
| 1590 to 1590 |
1996-01-18 to 1996-01-18 |
1996-018 to 1996-018 |
Bad HRDI commanding - f vs b tuning |
| 1595 to 1595 |
1996-01-23 to 1996-01-23 |
1996-023 to 1996-023 |
Bad UARS attitude - lost precision pointing |
| 1824 to 1828 |
1996-09-08 to 1996-09-12 |
1996-252 to 1996-256 |
Bad HRDI tuning coefs. |
| 2148 to 2163 |
1997-07-29 to 1997-08-13 |
1997-210 to 1997-225 |
HRDI run with pulse bus off |
| 2648 to 2648 |
1998-12-11 to 1998-12-11 |
1998-345 to 1998-345 |
Bad HRDI programming. |
| 2676 to 2680 |
1999-01-08 to 1999-01-12 |
1999-008 to 1999-012 |
Corrupted HRDI programming. |
| 2681 to 2681 |
1999-01-13 to 1999-01-13 |
1999-013 to 1999-013 |
Bad spacecraft attitude/position. |
| 2697 to 2700 |
1999-01-29 to 1999-02-01 |
1999-029 to 1999-032 |
Bad HRDI tuning coefficients (version 'O'). |
| 2702 to 2702 |
1999-02-03 to 1999-02-03 |
1999-034 to 1999-034 |
Bad altitudes after noon ut. |
| 2740 to 2743 |
1999-03-13 to 1999-03-16 |
1999-072 to 1999-075 |
Bad coefficients. |
| 2831 to 2831 |
1999-06-12 to 1999-06-12 |
1999-163 to 1999-163 |
Bad commanding f/b |
| 2833 to 2833 |
1999-06-14 to 1999-06-14 |
1999-165 to 1999-165 |
Bad commanding f/b |
| 2835 to 2835 |
1999-06-16 to 1999-06-16 |
1999-167 to 1999-167 |
Bad commanding f/b |
| 2836 to 2836 |
1999-06-17 to 1999-06-17 |
1999-168 to 1999-168 |
First hour of day has bad meso data - bad commanding f/b |
| 2843 to 2844 |
1999-06-24 to 1999-06-25 |
1999-175 to 1999-176 |
Bad commanding |
| 2900 to 2900 |
1999-08-20 to 1999-08-20 |
1999-232 to 1999-232 |
Last half of day bad - after yaw bad commanding |
| 2902 to 2902 |
1999-08-22 to 1999-08-22 |
1999-234 to 1999-234 |
Bad commanding f/b |
| 2906 to 2906 |
1999-08-26 to 1999-08-26 |
1999-238 to 1999-238 |
Bad commanding f/b |
| 2910 to 2910 |
1999-08-30 to 1999-08-30 |
1999-242 to 1999-242 |
Bad commanding f/b |
| 2922 to 2922 |
1999-09-11 to 1999-09-11 |
1999-254 to 1999-254 |
Bad commanding f/b |
| 2933 to 2933 |
1999-09-22 to 1999-09-22 |
1999-265 to 1999-265 |
Bad commanding f/b |
| 3007 to 3007 |
1999-12-05 to 1999-12-05 |
1999-339 to 1999-339 |
Bad commanding f/b |
| 3010 to 3010 |
1999-12-08 to 1999-12-08 |
1999-342 to 1999-342 |
Bad commanding 2nd half of day |
| 3039 to 3040 |
2000-01-06 to 2000-01-07 |
2000-006 to 2000-007 |
Bad commanding f/b |
| 3042 to 3042 |
2000-01-09 to 2000-01-09 |
2000-009 to 2000-009 |
Bad commanding f/b |
| 3115 to 3116 |
2000-03-22 to 2000-03-23 |
2000-082 to 2000-083 |
Bad commanding f/b |
| 3190 to 3190 |
2000-06-05 to 2000-06-05 |
2000-157 to 2000-157 |
Bad commanding |
| 3194 to 3194 |
2000-06-09 to 2000-06-09 |
2000-161 to 2000-161 |
Bad commanding |
| 3274 to 3275 |
2000-08-28 to 2000-08-29 |
2000-241 to 2000-242 |
Bad commanding f/b |
| 3277 to 3278 |
2000-08-31 to 2000-09-01 |
2000-244 to 2000-245 |
Bad commanding f/b |
| 3281 to 3282 |
2000-09-04 to 2000-09-05 |
2000-248 to 2000-249 |
Bad commanding f/b |
| 3341 to 3359 |
2000-11-03 to 2000-11-21 |
2000-308 to 2000-326 |
UARS yawed |
| 3360 to 3402 |
2000-11-22 to 2001-01-03 |
2000-327 to 2001-003 |
Bad TAM updates, bad attitude |
| 3505 to 3505 |
2001-04-16 to 2001-04-16 |
2001-106 to 2001-106 |
Bad commanding f/b |
| 3572 to 3572 |
2001-06-22 to 2001-06-22 |
2001-173 to 2001-173 |
Bad commanding f/b |
| 3628 to 3629 |
2001-08-17 to 2001-08-18 |
2001-229 to 2001-230 |
Bad winds due to large thermal change in instrument |
| 3661 to 3664 |
2001-09-19 to 2001-09-22 |
2001-262 to 2001-265 |
Bad data downlink? - mostly fill and parity errors |
| 3837 to 3838 |
2002-03-14 to 2002-03-15 |
2002-073 to 2002-074 |
Bad winds due to large thermal change in instrument |
| 3886 to 3887 |
2002-05-02 to 2002-05-03 |
2002-122 to 2002-123 |
Pulse bus off |
| 3890 to 3892 |
2002-05-06 to 2002-05-08 |
2002-126 to 2002-128 |
Incomplete uploads left ROM resident (version G) coefficients in effect. |
| 3893 to 3894 |
2002-05-09 to 2002-05-10 |
2002-129 to 2002-130 |
Bad winds due to large thermal change in instrument |
| 3960 to 3961 |
2002-07-15 to 2002-07-16 |
2002-196 to 2002-197 |
Bad winds due to large thermal change in instrument |
| 3974 to 3974 |
2002-07-29 to 2002-07-29 |
2002-210 to 2002-210 |
TMON tripped - HRDI to survival heaters only - partial orbit of bad data |
| 3975 to 3975 |
2002-07-30 to 2002-07-30 |
2002-211 to 2002-211 |
Bad winds due to large thermal change in instrument |
| 4072 to 4073 |
2002-11-04 to 2002-11-05 |
2002-308 to 2002-309 |
Bad winds due to large thermal change in instrument |
| 4083 to 4083 |
2002-11-15 to 2002-11-15 |
2002-319 to 2002-319 |
Bad winds due to large thermal change in instrument |
| 4231 to 4231 |
2003-04-12 to 2003-04-12 |
2003-102 to 2003-102 |
Bad winds due to large thermal change in instrument |
| 4269 to 4269 |
2003-05-20 to 2003-05-20 |
2003-140 to 2003-140 |
Bad winds due to large thermal change in instrument |
| 4293 to 4318 |
2003-06-13 to 2003-07-08 |
2003-164 to 2003-189 |
Bad data - commands were not accepted by the instrument from 4280 to 4318. After the yaw on 4294 the tuning was incorrect since the control program assumed the Spacecraft was flying backward when in fact it was flying forwards. |
| 4319 to 4319 |
2003-07-09 to 2003-07-09 |
2003-190 to 2003-190 |
Bad winds due to large thermal change in instrument |
| 4353 to 4353 |
2003-08-12 to 2003-08-12 |
2003-224 to 2003-224 |
Last half of day bad (why?) |
| 4413 to 4413 |
2003-10-11 to 2003-10-11 |
2003-284 to 2003-284 |
Improper Commanding. |
| 4477 to 4477 |
2003-12-14 to 2003-12-14 |
2003-348 to 2003-348 |
HRDI not acknowledging microloads till 6:45 UT on day 4477, then programming was wrong f/b. |
| 4478 to 4478 |
2003-12-15 to 2003-12-15 |
2003-349 to 2003-349 |
Bad winds due to large thermal change in instrument |
| 4639 to 4639 |
2004-05-24 to 2004-05-24 |
2004-145 to 2004-145 |
Bad winds due to large thermal change in instrument |
| 4644 to 4644 |
2004-05-29 to 2004-05-29 |
2004-150 to 2004-150 |
Pulse bus off |
| 4723 to 4728 |
2004-08-16 to 2004-08-21 |
2004-229 to 2004-234 |
Science modes run with pulse bus off |
| 4971 to 4980 |
2005-04-21 to 2005-04-30 |
2005-111 to 2005-120 |
Instrument running default programming. |
| 4981 to 5000 |
2005-05-01 to 2005-05-20 |
2005-121 to 2005-140 |
HRDI was turned off permanently on day 4891 |
