UVIS TEAM MEETING OPERATIONS UPDATE 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

UVIS TEAM MEETING OPERATIONS UPDATE Instrument Status On/Off Cycle: 28. +1 since last meeting. S/C safing on 11/1/2010 in S64 Hours On: ~90,500 hours. Longest continuous operations: 9/11/2007 – 11/1/2010. HDAC Filament Modulation: Filament 1: 122.28 hours (H cell), 100.28 (D cell). Filament 2: 12.22 hours. Last: In S63 during T72 (H cell only). Lost: In S64 during T73 (did not execute). Next: In S67 during T75 (H cell and D cell). 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

Significant Data Issues None S62 UVIS_136SW_IPHSURVEY004 UVIS_137OT_OUTERSAT003 Data loss: Station problem Data loss S63 UVIS_138TI_LMBINT001_CIRS UVIS_138SW_IPHSURVEY016 Wrong target: target was Saturn Total Loss S64 UVIS_139IC_ALPVIR001 UVIS_139SW_IPHSURVEY006 UVIS_139SA_AURSLEW001 All data from 306-21 to 328-10* Data loss: Rain Data Loss: Lighting strike Total loss: S/C safing S65 UVIS_141SW_IPHSURVEY013 UVIS_141SW_IPHSURVEY010 UVIS_141SW_IPHSURVEY011 UVIS_142SW_IPHSURVEY002 UVIS_142SA_MOS142APO002 Total loss: Station problem Data loss: Rain & station pb * Includes: UVIS_140SA_MOS140APO001 & 002, UVIS_141IC_ALPVIR001 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

UVIS TEAM MEETING OPERATIONS UPDATE First Time Events New SSR allocation for IEB (starting S65). Use of “cyclic” to send commands to UVIS during system scan: Starting S65 (should have been S64 but…). Save command memory space on-board the S/C: UVIS_142SA_MOS142APO001_PRIME with cyclic: 5 commands. UVIS_142SA_MOS142APO001_PRIME without cyclic:545 commands. UVIS_142SA_MOS142APO001: timing looks Ok. 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

UVIS TEAM MEETING OPERATIONS UPDATE Note on System Scan Need to increase the SSR allocation by 0.6% from what is given by the spreadsheet: The spreadsheet assumes un-interrupted data acquisition. In the system scan there is one integration per mosaic stop… The last packet of each integration is not fully filled… The spreadsheet does not take that into account. In UVIS_142SA_MOS142APO001 expected 545 integrations. Got 542+. 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

UVIS TEAM MEETING OPERATIONS UPDATE Note on System Scan Un-interrupted data acquisition Packet 1 Packet 2 Packet n Packet n+1 Packet n+2 Integration 1 Integration 2 Interrupted data acquisition Packet 1 Packet 2 Packet n Packet n+1 Packet n+2 Integration 1 Integration 2 Unused 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

UVIS TEAM MEETING OPERATIONS UPDATE Rbot: Workload Impact The impact of Rbot on the ops team workload is highly variable: S64: 1 out of 6 designs S65: 3 out of 10 designs S66: 1 out of 10 designs S67: 0 out of 15 designs S68: Don’t know yet. The up-front job done by SP and the lowering of the keep-out values (to +/- 300 rpm starting S67) help a lot. 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

UVIS TEAM MEETING OPERATIONS UPDATE Major Local Issues Uplink side: None Downlink side: Beginning of S65: problem ingesting data with the correct CIMS labels due to a clock kernel switch in FSIV. Consequence of the S64 safing In S65: problem processing large files generated by long (32 hours) system scans. We have a workaround 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

XM Data Utilization Summary S42 – S61 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

XM Data Utilization Summary S62 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

XM Data Utilization Summary S63 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE

UVIS TEAM MEETING OPERATIONS UPDATE Notes and Reminders Use UVIS_SOLAR_OFF to Sun in CIMS for all solar occultation instead of ISS_NAC to Sun (-20.0, 0.0, -0.11 deg) offset. HDAC modulation is a non-standard power mode. Before requesting sponge bits let us know what you want as we may have a good understanding of instrument SSR loading. The list of ring occultations that contain an atmospheric occultation is on the team web site at http://lasp.colorado.edu/cassini/team-site/archive/docs/pdf/Atmospheric_Occ.pdf The list of all the tour calibrations is on the team web site at http://lasp.colorado.edu/cassini/team-site/archive/docs/pdf/UVIS_Tour_Calibration.pdf The UVIS PEFs are on the team web site at http://lasp.colorado.edu/cassini/team-site/operations_planning/planning_info/ 01/04/11 UVIS TEAM MEETING OPERATIONS UPDATE