Important dates for FUV operations (Harald Frey, Last Version Dec. 23, 2005) =========================================================================== The first column gives an estimate of the effect of the change to the FUV-performance, there are the following codes: A: direct influence on performance B: direct influence on pointing c: minor influence on the data : no obvious influence on the data, but who knows? Doy Date what A 140 2000/05/19 02:50 WIC HV 1125 to 1100 V, SI12/SI13/4000, GEO/2500 V A 142 2000/05/21 22:30, SI12 HV=4200, SI13 HV=4100 V A 156 2000/06/04 payload off, no data 155-16:35 to 157-18:12 A 157 2000/06/05 TAS fixed 160 2000/06/08 eclipses ended A 161 2000/06/09 AST lost track at 05:44 A 161 2000/06/09 23:19 GEO HV to 2550 V A 166 2000/06/14 after 01:40, SI-13 DLUT and FoV optimized, stars 01:00 A 167 2000/06/15 after 20:20, SI-12 DLUT and FoV optimized c 168 2000/06/16 after 15:18 heaters started 0,0,0,10,50 A 169 2000/06/17 failed maneuver, no data 169-08:00 to 171-10:40 B 171 2000/06/19 10:40 to 172/01:22 all-sky survey by FUV c 171 2000/06/19 11:15 heaters started 0,0,0,15,50 c 172 2000/06/21 04:30 heaters started 0,0,0,20,50 174 2000/06/23 data gap 14:30 - 21:30 178 2000/06/26 GEO runs through 8 orbits 178 2000/06/26 start of perigee operation with limb view 183 2000/07/01 22:00 sun sensor 4 off, it is dead, data gap 20:40-21:20 213 2000/07/31 perigee operation with backward looking only A 213 2000/07/31 data gap 12:11-02:44 B 216 2000/08/03 star tracker back on 11:42 c 220 2000/08/07 heaters changed to 0,0,0,20,20 c 226 2000/08/13 FSW 7.4 loaded and software sun safing enabled A data gap 02:40-05:20 c heaters changed to 0,0,0,10,20 B GCD table enabled, but there was a bug in FSW B 230 2000/08/17 GCD bug corrected 236 2000/08/23 data gap 04:06-05:20 255 2000/08/11 playing with different FoV, star survey A 258 2000/09/14 time stamp bug fixed 262 2000/09/18 play with different FoV A 262 2000/09/18 new FoV setting for SI12 A 277 2000/10/03 RPI -X-antenna broke 14:39 283 2000/10/09 equatorial dayglow A 284 2000/10/10 optimized alpha-angle for WIC 1.8 degrees 290 2000/10/16 star pointing without changing FoV c 290 2000/10/16 set heating to 0,0,15,20,10 A 291 2000/10/17 20:40 optimized alpha-angle for SI 1.8 degrees 297 2000/10/23 star pointing without changing FoV 304 2000/10/30 star pointing without changing FoV and equ. dayglow 311 2000/11/06 star pointing without changing FoV and equ. dayglow 318 2000/11/13 play with FoV c 318 2000/11/13 set heater to 0,0,20,20,10 318 2000/11/13 play with FoV and equatorial dayglow A 318 2000/11/13 turn off GEO and software sun safing A 321 2000/11/16 safe, protection against Leonids 321-18:14 to 324-06:34 334 2000/11/29 data gap 12:46-16:28 339 2000/12/04 played with FoV A 339 2000/12/04 turn GEO back on c 339 2000/12/04 set heaters to 0,0,30,30,10 c 342 2000/12/07 set heaters to 0,0,40,40,10 347 2000/12/12 data gap 14:35-15:30 A 348 2000/12/13 payload turned off, no data 348-04:07 to 350-14:36 A 348 2000/12/13 nadir jitter fix and TAS patch installed 05:45 A 350 2000/12/15 FUV turned on 14:30 A 353 2000/12/18 after 05:12 increased WIV HV to 1125 V 353 2000/12/18 played with FoV c 356 2000/12/21 set heaters to 30,30,90,90,10 360 2000/12/25 played with FoV 001 2001/01/01 star looking A 011 2001/01/11 payload turned off after 07:10, on 01-12 00:49 029 2001/01/29 star looking, test of timing settings 030 2001/01/30 data gap 21:44-24:00 c 032 2001/02/01 set heaters to 30,30,90,70,10 A 043 2001/02/12 turned GEO off as protection against sun 045 2001/02/14 first signs of sun in SSA, too low to trigger c 046 2001/02/15 set heaters to 20,20,50,40,10 A 050 2001/02/19 corrected WIC starttime error c 050 2001/02/19 slightly changed GCD table 064 2001/03/05 enables software sun safing A 067 2001/03/08 tried load FSW 7.6, turned GEO back on, gap 16:41-06:56 A 072 2001/03/13 loaded and started FSW 7.6 data gap 19:43-24:00 A 081 2001/03/22 repaired bad ApID for last SI12 packet A 083 2001/03/24 at 22:00 FUV turned off A 103 2001/04/13 at 17:00 FUV turned on, WIC set to 1100 V no perigee operation due to sun A 138 2001/05/18 around 17:00 UT SI-HV turned off, heater 10,10,40,30,10 A 141 2001/05/21 15:50 SI turned back on, SI12 HV=4300, SI13 HV=4200 V c 141 2001/05/21 heaters 0,0,40,30,10 A 143 2001/05/23 00:15 SI12 HV=4400, SI13=4250 V A 145 2001/05/25 18:45 SI12 HV=4450 V c 148 2001/05/28 start of perigee operation A 159 2001/06/08 star tracker lost track, summer vacation til 2001/08/20 c 163 2001/06/12 upload new gcd-table with changed settings perigee 169 2001/06/18 disable spacecraft sun safing 177 2001/06/26 turned off sun sensor #3 c 178 2001/06/27 loaded new gcd table to correct for nadir offset c 178 2001/06/27 17:00 heaters set to 10,10,50,50,10 183 2001/07/02 star pointing, half all-sky 184 2001/07/03 heaters off 2110-2200 UT 184 2001/07/03 loaded new corrected gcd-table 197 2001/07/16 all-sky survey 00:33-04:22 c 206 2001/07/25 1430 UT gcd-table without offset A 218 2001/08/06 serious attitude data problem 12:43 till 221-07:07 228 2001/08/16 heaters set to 0,0,30,30,10 A 228 2001/08/16 missing data 00:28-11:48 A 232 2001/08/20 ADS re-enabled 246 2001/09/03 dayglow 253 2001/09/10 enable spacecraft sun safing 260 2001/09/17 dayglow A 261 2001/09/18 at 0720 part of RPI +Y antenna lost 267 2001/09/24 dayglow A 271 2001/09/28 after 2140 WIC is turned off A 284 2001/10/11 payload off data gap 284/15:00 - 286/00:00 285 2001/10/12 heaters set to 20,20,60,60,10 A 286 2001/10/13 about 01:00 FUV turned on again A 290 2001/10/17 after 1040 WIC is turned back on 290 2001/10/17 1320 all faults were cleared A 291 2001/10/18 after 1100 new alpha angle settings 2.3 degrees A 303 2001/10/30 new TDI parameters A 322 2001/11/18 after 07:42 turn off for Leonids, start 323-02:08 A 326 2001/11/22 no data 03:45 to 15:34 337 2001/12/03 disable spacecraft sun safing 344 2001/12/10 at 20:01 heaters set to 25,25,90,80,10 351 2001/12/17 02:30-04:50 played with TDI parameters A 354 2001/12/20 after 14:59 torque rod turned on 365 2001/12/31 dayglow 007 2002/01/07 weekly star pointing changed to -20 degrees 014 2002/01/14 started perigee operations 017 2002/01/17 heaters off 1255 SI, 1303 WIC, back 1311 032 2002/02/01 14:50:20 all faults cleared A 044 2002/02/13 torque rod turned off A AST in standby, bad pointing info 045 2002/02/14 13:28 gcd-table pointing to limb, heaters (0,0,40,40,10) 056 2002/02/25 dayglow A 061 2002/03/02 AST in standby, bad pointing info until 03/03 A 063 2002/03/04 enables software sun safing A 084 2002/03/25 05:42 WIC off for sun protection A 086 2002/03/27 21:05 HV of SI-13 increased to 4350 V 101 2002/04/11 18:45:30 heaters set to (0,0,30,20,10) A 107 2002/04/17 17:00 WIC turned on again, HV increased to 1125 V A 108 2002/04/18 00:30 AST in standby A 129 2002/05/09 SI12 HV 4550 V, SI13 to 4400 V, SI12 ADC thresh. X'18' A 140 2002/05/20 turn off software sun safing, start perigee 140 2002/05/20 23:30 loaded one half of new gcd table 144 2002/05/24 20:00 second half gcd table loaded A 154 2002/06/03 AST looses track of stars A 161 2002/06/10 gcd table with 4 degrees offset A 171 2002/06/20 gcd table with 6 degrees offset 182 2002/07/01 all-sky survey 184 2002/07/03 19:55:30 heaters set to (0,0,40,40,10) 206 2002/07/25 gcd table with 4 degrees offset A 223 2002/08/11 17:44 lost another RPI antenna, likely -Y A 233 2002/08/21 new alpha angle 2.0 degrees, gcd without offset A 239 2002/08/27 19:00 instrument turned off, faults cleared A 241 2002/08/29 13:52 new alpha angle 1.8 degrees A 245 2002/09/02 turned on again, sun safing enabled A 273 2002/09/30 turn off WIC for sun protection 287 2002/10/14 transition to new header format 288 2002/10/15 19:00 new gcd table A 295 2002/10/22 WIC turned on again A 310 2002/11/06 new gcd table, SI-thresh X'20', SI12:316, SI13:315.5 deg. A 323 2002/11/19 short operation to avoid Leonids A 350 2002/12/16 18:21 torque rod turned on, large dynamics on attitude A 358 2002/12/24 00:00 torque rod turned down 363 2002/12/29 all-sky survey 005 2003/01/05 played with alpha settings 007 2003/01/07 heaters (0,0,60,80,10) A 018 2003/01/18 MM off 08:30-24:00 020 2003/01/20 disabled sun safing A 035 2003/02/04 torque rod turned off A 046 2003/02/15 00:14 IMAGE off A 050 2003/02/19 01:00 FUV back in science mode turned on software sun safing A 077 2003/03/18 20:20 WIC HV off, heaters (0,0,40,40,10) 083 2003/03/24 heaters (0,0,0,0,10) A 089 2003/03/30 payload off A 108 2003/04/18 FUV on 19:30 UT A 127 2003/05/08 03:30 GEO off, SI13 constant HV A 129 2003/05/08 14:00 SI threshold X'18', GEO on A 145 2003/05/25 16:00 disable software sun safing, turn off Geo A 160 2003/06/09 13:31 AST disabled A 163 2003/06/12 19:40 new gcd-table, Geo-HV on A 165 2003/06/14 data gap 04:58-11:32 175 2003/06/24 19:30 heaters (0,0,30,30,10) 190 2003/07/09 22:10 heaters (0,0,40,50,10) 195 2003/07/14 22:30 new gcd-table, SI-threshold X'20' A 204 2003/07/23 18:35 SI threshold X'18' c 219 2003/08/07 17:00 new gcd-table A 228 2003/08/16 summer vacation is over, AST works A 230 2003/08/18 MM recorder off 05:22-19:18 239 2003/08/27 18:00 new gcd-table, all faults cleared A 257 2003/09/14 enabled software sun safing A 274 2003/10/01 22:09 FUV turned off to protect against sun 296 2003/10/23 run FUV without HV A 300 2003/10/27 18:00 turn FUV on again A 354 2003/12/20 torque rod current cycling started 360 2003/12/26 17:30 heaters (0,0,60,60,10) 019 2004/01/19 all-sky survey c 047 2004/02/16 new gcd-table 082 2004/03/22 17:43 heaters (0,0,20,20,10) A 089 2004/03/29 23:44 stop FUV science operations A 092 2004/04/01 11:43 FUV off A 111 2004/04/20 16:40 FUV on, GEO HV to 2575 V, SI threshold X'20' 124 2004/05/03 ramp up and down at L=8 A 131 2004/05/10 SI-13 sun protection off A 134 2004/05/13 12:27 SI threshold X'18' A 144 2004/05/23 SI-13 HV increased to 4450 V A 151 2004/05/30 turn off sun safing 155 2004/06/03 new gcd table 2004_0602 A 162 2004/06/10 HV SI12 4600, SI13 4500 V, threshold X'0C' both A 165 2004/06/13 23:32 AST summer vacation 168 2004/06/16 02:35 new gcd table 2004_0614 197 2004/07/15 new gcd table 2004_0602 A 238 2004/08/25 12:32 AST back A 274 2004/09/30 13:23 loss of +Y RPI antenna A 277 2004/10/03 10:57 FUV turned off A 298 2004/10/24 09:16 FUV turned on, SI threshold X'18' A 314 2004/11/09 18:00 alpha angle 2.5 degrees A 315 2004/11/10 17:00 final alpha angle 2.9 degrees A 330 2004/11/25 20:06 power supply failure, gap until 332-16:00 341 2004/12/06 software sun safing off A 355 2004/12/21 torque rod on 14:17 362 2004/12/27 all sky survey 010 2005/01/10 all sky survey 024 2005/01/24 14:00 new gcd table A 032 2005/02/01 data gap 14:00-06:50 033 2005/02/02 accidental all sky survey A 048 2005/02/17 13:20 torque rod operated through perigee 060 2005/03/01 torque rod turned off 067 2005/03/08 accidental all sky survey A 072 2005/03/13 22:40 SI threshold X'0C' A 091 2005/04/01 03:40 FUV off for sun protection A 112 2005/04/22 16:30 FUV on A 136 2005/05/16 16:10 SI12 HV 4625, SI13 4525, WIC 1150 A 167 2005/06/16 07:00 AST lost track, disabled 14:33 A 168 2005/06/17 nadir pulse jitter starts 168 2005/06/17 14:00 new gcd table 174 2005/06/23 16:00 new gcd table 185 2005/07/04 all-sky survey A 221 2005/08/09 CIDP reboot, all instruments off A 225 2005/08/13 FUV back on, SI thresholds X'20', SI13 HV 4550 A 245 2005/09/02 20:50 SI threshold X'0C' A 258 2005/09/15 15:44:39 another RPI piece broke off A 278 2005/10/05 turn off FUV 13:48 A 299 2005/10/26 turn on 11:35, SI12 HV 4675, threshold X'18' A 315 2005/11/11 SI13 HV 4575 V, threshold X'12' A 352 2005/12/18 after 07:00 mission lost ------------------------- End of entries ---------------------------------