GE-5/07/97 G7 Science Data Losses 089-16:47 --->124-16:42; Lost TFs in brackets[.....] Changes in Bold Time (GMT) DSS Reference RT Rcvd Events Comments Cause Array TFs Ops Lost from Related? PPT 089-21:47 43 DR# 7 0 MEC halted - Lost TFs A Yes A01176 operation. The [03526 -> -> 22:03 station swapped 03532] 16 RTS to computer mode VCDUs to restore antenna movement. 090-03:47 43 DR# 1 0 Rate change - Lost TF S Yes A01177 60-40bps [03661] 4 RTS VCDUs 090-04:49 63 DR# 1 1 Unknown - Lost TF S No L00974 [03669] 4 RTS VCDUs ***Recovered from .fcd PPT file*** 091-11:47 63 1 1 Rate change - Lost TF S No 40-20bps [04033] 2 RTS & 2 Priority VCDUs ***Recovered from .fcd PPT file*** 091-18:28 43 DR# 1 0 Rate change - Lost TF S Yes A01178 80-120bps [04103] 3 RTS & 1 Priority VCDUs 092-04:28 43 1 1 Rate change - Lost TF SPA Yes 40-20bps [04324] 3 RTS & 1 Priority ***Recovered from DSS63's .fcd PPT file*** 092-18:20 43 DR# 2 0 - Rate change - Lost TFs U Yes A01181 80-120bps [04453 & -> 18:29 04454] 8 RTS - SNT was >21K VCDUs due to rain. This may have been a contributing factor. 093-09:03 63 DR# 1 0 Unknown - Lost TF U No L00980 [04667] 4 RTS VCDUs 093-11:20 63 3 3 - Unknown - Lost TFs S No [04683 -> -> 11:37 - Rate change 04685] 11 RTS 32-20bps & 1 Priority VCDUs ***Recovered from .fcd PPT file*** 094-02:38 43 DR# 1 0 - Rate change - Lost TF U Yes A01184 80-60bps [04921] 3 RTS VCDUs - - 9.5 hr till Jupiter C/A and +4.5 hr from Io C/A - No ground events 094-02:56 43 DR# 1 0 - Rate change - Lost TF U Yes A01184 60-40bps [04925] 2 RTS VCDUs - - 9 hr till Jupiter C/A and + 5 hr from Io C/A - No ground events 094-04:17 43 2 0 - Rate change - Lost TF U Yes 40-20bps [04937& 04940] 4 RTS - - 7.6 hr till & 2 Priority Jupiter C/A and + VCDUs 6.3 hr from Io -> 05:08 63 0 C/A PD No DR# - No ground L00987 events for DSS43 - DSS63 had late AOS due to the necessity of reloading DGT predicts. The DGT was initially run without predicts. 094-11:31 63 1 0 - Rate change - Lost TF U No 32-20bps [04985] 4 RTS VCDUs - - 11 minutes from Jupiter C/A Time (GMT) DSS Reference RT Rcvd Events Comments Cause Array TFs Ops Lost from Related? PPT 094-13:15 14 DR# 3 0 - Op error at - Lost TF PD No G01994 DSS14. The HTX [04995] 2 RTS 094-14:19 was turned off. VCDUs This necessitated -> 14:26 a one way period - Lost TFs and an [05002 & unscheduled mode 05003] 8 RTS change at 14:19z. VCDUs 094-17:57 14 DR# 15 0 - Op error at - Lost TFs PD Yes G01997 DSS14. The [05045 -> -> 18:38 incorrect XA was 05056] 21 RTS utilized in the & 1 Priority & 20:44 u/l transfer. VCDUs This necessitated -> 20:55 a u/l resweep by - Lost TFs DSS43 and the [05094 -> unscheduled mode 05096] 12 RTS change at 20:44z. VCDUs 094-22:13 43 DR# 13 13 - ES/N0 - Lost TFs U Yes A01186 fluctuations, [05120 -> -> 23:18 DSS's 42 & 34 05124, 05127 removed/restored -> 05129, to array. The 05133 -> array inputs from 05135, & both stations 05138] were unable to correlated. 48 RTS VCDUs - G7 encounter **Recovered period. from DTF21 processing** 095- 02:15 43 DR# 4 1 - Unknown U Yes A01187 -> 03:42 - Missed rate - Lost TF change 80-60bps [05191] 3 RTS @02:18 VCDUs Missed rate - Lost TFs change 60-40bps @ [05194 & 02:32 05195] 6 RTS & 1 Priority Missed rate VCDUs change 40-32bps @ 03:43 - Lost TF [05205] 4 RTS - All rate change VCDUs losses occurred between T- 5 hsr **Recovered 41 min & T-3 hrs TF [05195] 16 min before from DTF21 Ganymede C/A processing** 096- 01:52 43 DR# 2 0 - Unknown - Lost TF U Yes A01188 [05475] 3 RTS 02:13 VCDUs - Lost TF [05481] 2 RTS VCDUs 096- 21:06 43 DR# 6 6 - Unknown - Lost TFs U Yes A01193 [05698 -> -> 21:21 05702 & 05704] 15 PB, 4 RTS, & 1 Priority VCDUs ***TF [05704] recovered from .fcd PPT file*** **All six TFs recovered from DTF21 processing** 096- 22:23 43 DR# 28 3 - DSS49 to stow - Lost TFs W Yes A01194 due to high winds [05732 -> -> 23:29 05760] 91 PB, 23 RTS, & 2 Priority VCDUs **Recovered TFs [05732, 05736, & 05738] from DTF21 processing** 097-14:51 14 DR# 2 0 - Thruster flush - Lost TFs SPA No G02010 activities [05924 & -> 15:04 05925] 5 RTS & 3 Priority VCDUs 097-16:26 43 DR# 4 0 - FSC inoperable - Lost TFs S Yes A01195 at BOT. The FSC [05938 -> -> 16:37 was rebooted to 05941] 12 PB, restore 3 RTS, & 1 operability. Priority VCDUs 097-19:04 14 DR# 3 0 - Ant went to - Lost TFs A Yes G02011 brake. [05992 -> -> 19:11 05994] 8 PB & - Restoral action 4 RTS VCDUs unknown. 097-20:35 14 DR# 2 0 - Unscheduled - Lost TFs A Yes G02011 1-way mode change [06032 & ->20:39 due to earlier 06033] 7 PB & antenna problem. 1 RTS VCDUs 097-21:02 43 DR# 8 0 - DSS's 42 & 34 - Lost TFs S Yes A01198 array input were [06044 -> -> 21:20 unable to 06051] 27 PB correlated. & 5 RTS VCDUs Jupiter hot body noise. Time (GMT) DSS Reference RT Rcvd Events Comments Cause Array TFs Ops Lost from Related? PPT 097-21:23 43 DR# 4 0 - DSS's 42 & 34 - Lost TFs S Yes A01198 array input were [06053 -> -> 21:32 unable to 06056] 11 PB correlated. & 5 RTS VCDUs Jupiter hot body noise. 098-08:33+ 63 DR# 1 0 - Rate change - Lost TF SPA No L00992 32-8bps [06026] 1 Priority VCDU - This rate change occurred during the start of OTM24 due to the long decommutation time at 8bps and the OTM this frame was lost.. 098-15:17 14 1 1 - Unknown. No - Lost TF U No activities, [06218] 4 ground or Priority spacecraft VCDUs coincide with the TF time. ***Recovered from .fcd PPT file*** 099-11:28 63 1 1 - Unknown. - Lost TF S No [06465] 4 RTS - Rate change VCDUs 32-20bps @ 1119z. ***Recovered from .fcd PPT file*** 100-15:59 14 DR# 1 1 - Unknown - Lost TF S No G02025 [06817] 4 PB VCDUs ***Recovered from .fcd PPT file*** 100-16:16 43 DR# 1 0 - Rate change - Lost TF U Yes A01204 40-80bps [06819] 4 PB VCDUs - Station reported topography makes for the highest horizon, or, this could be a link margin loss. 100-18:00 43 DR# 2 0 - Rate change - Lost TFs S Yes A01205 80-120bps [06850 & -> 18:05 06851] 8 PB VCDUs 100-20:17 43 DR# 2 0 - Rate change - Lost TFs S Yes A01205 120-80bps [06910 & -> 20:23 06911] 7 PB & 1 Priority VCDUs 101-02:11 43 DR# 1 0 - Rate change - Lost TF S Yes A01205 80-60bps [07014] 4 PB VCDUs 101-03:06 43 DR# 1 0 - Rate change - Lost TF S Yes A01205 60-40bps [07026] 4 PB VCDUs 101-03:52 43 1 0 - Rate change - Lost TF S Yes 40-20bps at 03:57 [07033] 3 RTS & 1 Priority VCDUs 101-11:19 14 DR# 1 1 - Rate change - Lost TF S No G02030 32-20bps [07095] 4 PB VCDUs ***Recovered from .fcd PPT file*** 102-11:05 63 1 1 - Rate change - Lost TF S No 32-20bps [07403] 4 PB VCDUs ***Recovered from .fcd PPT file*** 103-17:49 43 DR# 1 0 - Rate change - Lost TF S Yes A01216 80-120bps [07787] 4 RTS VCDUs 104-11:00 63 1 1 - Rate change - Lost TF S No 32-20bps [08018] 4 RTS VCDUs ***Recovered from .fcd PPT file*** 104-12:40 14 1 1 - DSS14 LOS'd one - Lost TF U No TF prior to start [08030] 3 RTS of sequenced fill VCDUs ***Recovered from .fcd PPT file*** 105- 02:50 43 DR# 2 2 - Rate change - Lost TFs S Yes A01219 60-40bps [08265 & -> 03:10 08266] 7 PB & 1 RTS VCDUs ***Both TFs recovered from .btd PPT file*** Time (GMT) DSS Reference RT Rcvd Events Comments Cause Array TFs Ops Lost from Related? PPT 105- 04:00 63 DR# 12 1 - Ant to brake - Lost TFs A No L01008 due to film [08275 -> -> 05:49 height alarm on 08286] 31 PB, pad # 1. 13 RTS, & 4 Priority - Maint cleared VCDUs the debris to restore antenna ***TF [08275] movement. recovered from .btd PPT file*** 105- 06:10 63 DR# 2 0 - Second - Lost TFs A No L01008 occurrence of [08290 & -> 06:24 antenna to brake. 08291] 8 RTS VCDUs - Same restoral action. 106- 11:02 14 1 1 - DSS14 AOS'd one - Lost TF S No TF late after end [08951] 2 of sequenced fill Priority period. VCDUs ***Recovered from .fcd PPT file*** 106-21:10 43 1 0 - DSS43 LOS'd - Lost TF U Yes going 1-way one [08794] 1 PB TF early before VCDU start of sequenced fill period. 107-17:14 43 DR# 2 2 - Unknown - Lost TFs U Yes A01228 [09014 & -> 17:23 - The ES/N0 was 09015] 2 PB, below -6db once 5 RTS, & 1 DSS43 resumed Priority processing valid VCDUs TFs at 17:23 and the FCD required up to 4 passes to successfully the first 3 good TFs. This may have been a link margin issue? 108-10:08 63 4 4 - This may be - Lost TFs S No another [09173 - -> 10:52 occurrence of bad 09176] 15 RTS GTC merge & 1 Priority processing at the VCDUs DGT of DSS63. If the TFs are ***Recovered recovered in PPT from the .fcd it will be PPT file. The documented as first three such. TFs 09173-09175 are from FCD1 and TF 09176 is from FCD2. 108-14:40 14 1 1 - Unknown - Lost TF S No [09208] 4 RTS VCDUs ***Recovered from the .btd PPT file*** 108-15:12 14/43 DR# 4 4 - Unknown reason - Lost TFs U/S Yes A01232 for DSS14 missing [09214 -> -> 15:49 TFs from 15:21 -> 09217] 15 RTS 15:42. & 1 Priority VCDUs - DSS43 had to reset the FSC as ***Recovered it was reflecting from the .btd a carrier PPT file*** spectrum of all zeros. 108-17:14 43 DR# 1 0 - Rate change - Lost TF S Yes A01233 80-120bps [09242] 2 RTS & 1 Priority - The BTD symbol VCDUs loop bandwidth may need to be widened to successfully capture this rate change. 109-15:45 43 1 1 - Rate change - Lost TF S Yes 40-80bps [09572] 4 RTS VCDUs **Recovered from DTF21 processing** 109-16:44 43 DR# 2 2 - Rate change - Lost TFs [ S Yes A01234 80-120bps 09589 & -> 16:49 09590] 6 RTS - The BTD symbol & 2 PB VCDUs loop bandwidth may need to be **Recovered widened to from DTF21 successfully processing** capture this rate change. 109-18:31 43 DR# 48 48 - FSC task timed - Lost TFs S Yes A01235 out. The station [09644 -> -> 20:05 rebooted the FSC 09691] 160 and then to the PB, 29 RTS, & BTD to restore 3 Priority operability. VCDUs - **Recovered from DTF21 processing** Time (GMT) DSS Reference RT Rcvd Events Comments Cause Array TFs Ops Lost from Related? PPT 110-01:40 43 DR# 2 0 - Rate change - Lost TFs S Yes A01234 80-60bps [09829 & -> 01:48 09830] 8 PB VCDUs 110-15:40 43 1 0 - Rate change - Lost TF S Yes 40-80bps [09945] 4 RTS VCDUs 110-20:55 43 1 0 - DSS43 LOS'd - Lost TF U Yes prior to start of [10077] 1 RTS sequenced fill. VCDU 111-03:29 63 1 0 - Unknown - Lost TF U No [10216] 3 RTS & 1 PB VCDUs 113-10:27 63 2 2 - Unknown. The - Lost TF U No TFs were not [11057 & -> 10:36 received in RT. 11058] 8 PB The rate change VCDUs 40-32bps occurred during this time. **Recovered from .fcd PPT file** 113-10:44 63 1 0 -Unknown - Lost TF S No [11060] 4 PB VCDUs 113-10:50 14 DR# 10 4 - The station was - Lost TFs S No G02083 unable to output [11061 -> -> 12:03 TFs from 10:50z 11070] 35 PB, until 12:03z. 2 RTS, & 3 Priority - Two problems VCDUs. occurred: 1) the GTC was not - Recovered outputting TFs, TFs [11061 -> and 2) during 11064] troubleshooting of the GTC **FSR tapes anomaly the requested** station lost communication with the DGT and the FSRs lost signal detect. The station rebooted the entire DGT to restore operability and TF output. 114-03:18 63 DR# 1 1 - Unknown - Lost TF U No L01025 [11414] 3 PB & 1 Priority VCDUs **Recovered from .fcd PPT file** 114-16:11 43 DR# 1 0 - Rate change - Lost TF U Yes A01256 80-120bps [11522] 4 PB VCDUs - This is the first missed rate change since the BTD loop b/w's were changed. 114-20:25 43 DR# 1 0 - Subreflector - Lost TF A Yes A01257 controller [11654] 4 PB anomaly VCDUs 116-10:18 63 DR# 1 1 - Rate change - Lost TF S No L01032 40-32bps. [12292] 2 PB & 2 RTS VCDUs - This was another occurrence of bad **Recovered GTC merging. The from .fcd Ppt GTC halted TF file** output at 10:07z and the pass ended at 10:40z. 116-15:28 43 DR# 4 4 - The station - Lost TFs U Yes A01262 reported SNT > [12350 -> -> 15:35 60K. 12353] 9 PB & 7 RTS VCDUs - This incident occurred at the **Recovered 60-120bps rate from .fcd Ppt change. file** 117-04:20 63 DR# 1 0 - Antenna to - Lost TF A No L01034 brake due to [12666] 4 PB debris under pad VCDUs # 1. 117-05:21 63 DR# 3 0 - Second - Lost TFs A No L01034 occurrence of [12675 -> -> 05:42 antenna to brake. 12677] 8 PB, 3 RTS, & 1 - Maint cleared Priority debris from under VCDUs. pad #1 to restore operability. Time (GMT) DSS Reference RT Rcvd Events Comments Cause Array TFs Ops Lost from Related? PPT 118-15:21 43 1 1 - The GTC was - Lost TF S Yes rebooted to [13207] 3 PB restore monitor & 1 Priority output. VCDUs - Rate change **Recovered 60-120bps. from .fcd PPT Recoverable from file** PPT. 118-18:07 43 DR# 6 0 - The Antenna - Lost TFs A Yes A01266 servo controller [13289, 13291 & 18:11 (ASC) encoders -> 13295] 24 lost interface PB VCDUs -> 18:19 with the Antenna pointing assembly (APA) causing the antenna to drift off point. The ASC was reset to restore. 119-15:16 43 DR# 1 0 - Unknown - Lost TF U Yes A01274 [13631] 4 PB - Rate change VCDUs 80-120bps 119-19:19 43 DR# 1 0 - Unknown - Lost TF U Yes A01274 [13753] 4 PB - Rate change VCDUs 160-120bps 119-09:58 63 DR# 1 1 - Bad GTC merge - Lost TF S No L01041 functionality. [14007] 2 PB, The TF should 1 RTS, & 1 recovered in the Priority PPT. VCDUs **Recovered from the .fcd PPT file** 120-20:23 43 1 0 - DSS43 LOS'd one - Lost TF U Yes TF frame before [14212] 2 PB start of VCDUs sequenced fil into a 1-way mode change.l 121-15:48 43 DR# 11 11 - The FSC core - Lost TFs S Yes A01279 task died. The [14514 -> -> 16:26 FSC was rebooted 14524] 43 PB to restore & 1 Priority operability. VCDUs ***Recovered from .btd PPT file*** 121-17:11 43 1 1 - This TF was - Lost TF U Yes lost after [14541] 4 PB transmission from VCDUs the GTC. ***Recovered from .fcd PPT file*** 121-18:28 49 DR# 2 0 - DSS49 was taken - Lost TFs W Yes A01280 to stow due to [14575 & -> 18:33 high winds. The 14576] 7 PB & antenna returned 1 Priority to point after VCDUs the winds abated. 122-02:52 63 DR# 1 1 -Known GTC merge - Lost TF S No L01047 anomaly [14808] 3 PB & 1 Priority VCDUs ***Recovered from .fcd PPT file*** 123-02:46 63 1 1 -Known GTC merge - Lost TF S No anomaly [15254] 4 PB VCDUs ***Recovered from .fcd PPT file*** 123-14:55 43 DR# 3 - Unknown - Lost TFs U Yes A01283 [15375 -> -> 15:02 15377] 4 RTS & 1 Priority VCDUs 124-00:49 49 DR# 2 0 - DSS49 to stow - Lost TFs W Yes A01284 due to high [15697 & -> 00:53 winds. The 15698] 8 RTS station returned VCDUs to point after the winds abated. 124-02:53 63 DR# 1 0 - Anomaly of - Lost TF A No L01049 unknown nature [15728] 1 with elevation Priority VCDU encoder. - The elevation encoder was power cycled to restore. Time (GMT) DSS Reference RT Rcvd Events Comments Cause Array TFs Ops Lost from Related? PPT 124-09:27 63 DR# 3 3 - FSR1 tone board - Lost TF H No L01050 error [15786 -> -> 09:55 15788] 8 RTS - Restoral action & 1 Priority unknown. VCDUs ***Recovered from .fcd PPT file*** End of G7 sequence at 124-16:42 TOTAL 281 133 Total Science 11273 Frames: Total Frames 12431 (including Fill): PP - Procedural (Project) Transfer Frames #s lost in brackets [.........] PD - Procedural (DSN) F - Facility problem (e.g. power failure) H - DGT H/W Related/Failure U - Unknown A - Antenna Problem W - Weather (e.g. Parkes stow due to high winds) S - DGT S/W Related; Error or newly understood idiosyncracy/workaround/constraint SA - Spacecraft anomaly and recovery actions UPA - Unscheduled project action SPA - Scheduled Project action PN - Procedural (Nascom) GCF- GCF hardware/software anomaly