Two-Gyro Working Group (TGSOWG) (htm)

Studies:

• FHST star density study (pdf)
• SPSS/PASS Earth occultation models (3/1995) (pdf)
• Occultation Release 32.50 Testing (report, results)
• SPSS/PASS Occultation and Magnetic Field (5/2005) (pdf)

Documentation Updates:

• ICD updates for Phase A
     o   ST-ICD-11 DCR (5064)
     o   HST-ICD-T1 DCR (pdf)
     o   ST-ICD-26P2 updates (Rel. 32.10, Rel. 32.20)
            -  SCHF/CRPF/AGCF DCR (5065)
            -  GREX DCR (5066)
     o   ST-ICD-26P2 (SCHF/CRPF) DCR  (Rel. 32.30) (5069)
     o   ST-ICD-T1 DCR (Rel. 32.30) (5070)

• ICD updates for Phase B
     o   ST-ICD-26P2 DCRs (5071, 5074)
     o   HST-ICD-T1 DCR (5072) 
     o   HST-ICD-11 DCR (5073) 

PASS Software Updates:

• TGS requirements (pdf)

• Phase B communication requirements (draft) (pdf)

• Design review (Phase A, Phase B)

• PDB input
     o   SCHF sample input:  Rel. 32.10 updates (txt), full file (txt);
          Rel. 32.30 updates (txt), full file (txt), Rel. 32.50 updates (txt) 
     o   CRPF sample input:  Rel. 32.10 updates (txt), full file (txt);
          Rel. 32.30 updates (txt), full file (txt), Rel. 32.50 updates (txt)

• MS ops basefile input changes (txt)

• MS output changes
     o   Sample .RTG report (txt)
     o   Sample commanding (new, three-gyro)
     o   Sample text blocks (Phase A, Phase B)
     o   Sample .RSM (txt)
     o   Sample error messages (txt)
     o   Sample .RCO report (txt)
     o   Sample .PMD (txt)
     o   Sample Mag field plot (pdf)

• MEGG output changes
     o   Sample Phase B MEGG (.els file, .ps timeline)
     o   Timeline key (Phase A, Phase B)

Build 1 (Jan. - Apr. 04) completed in Rel. 32.20
   o   PR 29218 - Provide separate constraints for each FHST
   o   PR 49721 - Generate Skymap catalog for FSW
   o   PR 49996 - Accept SCHF/CRPF two-gyro parameters
   o   PR 49997 - Compute occultations for 3 attitude uncertainties
   o   PR 50269 - Incorporate 2-gyro database changes in FRSS
Build 2 (Mar. - Jun. 04) completed in Rel. 32.20
   o   PR 50271 - Expand autogroups for FHST shutter/availability
   o   PR 50274 - Manage two-gyro attitude uncertainty
   o   PR 50275 - Accept two-gyro SMS statements
   o   PR 50276 - Generate new two-gyro report (.RTG) (initial)
Build 3 (Jun. - Aug. 04) completed in Rel. 32.20
   o   PR 50276 - Generate new two-gyro report (.RTG) (final)
   o   PR 50277 - Generate FHST commanding:  OAD/GOB/MAP
   o   PR 50278 - Schedule FHST automaps in two-gyro mode
   o   PR 50288 - Add two-gyro FHST events to MEGG report
Build 3A (Jul. - Sep. 04) completed in Rel. 32.30
   o   PR 51644 - Provide Phase A cleanup
   o   PR 51645 - Accept more SCHF/CRPF two-gyro parameters
   o   PR 51920 - Add two-gyro reports to CCS
Build 3B (Oct. - Dec. 04) completed in Rel. 32.40
   o   PR 52228 - Update Phase A based on end-to-end testing

Phase A Testing
   o   Capabilities test summary (txt)
   o   Requirements test summary (pdf)

Phase B Implementation:

Build 4 (Aug. - Nov. 04) completed in Rel. 32.50
   o   PR 51195 - Use SPSS Earth avoidance algorithm
   o   PR 51196 - Replace Moon occultation algorithm
Build 5 (Nov. 04 - Feb. 05) completed in Rel. 32.50
   o   PR 51862 - Incorporate magnetic field model
   o   PR 51867 - Compute communication outage wrt magnetic field
   o   PR 51870 - Compute communication outage wrt slews
   o   PR 51975 - Compute marginal communication outages
   o   PR 52187  - Expand MEGG
   o   PR 52188  - Provide magfield data/plot
   o   PR 52190  - Support combined I&Q MA return
Build 6 (Feb. 05 - Mar. 05) completed in Rel. 32.50
   o   PR 52958 - Add DURATION to GOB cmding
   o   PR 53056 - Correct PCS max severity
   o   PR 53072 - Correct timing for FHST commanding

Build 7 (Mar. - Jun 05) completed in Rel. 32.60
   o   PR 51863 - Verify slew 2 wrt magnetic field
   o   PR 51866 - Adjust IRC for communication
   o   PR 51872 - Inhibit TDRS communication during outage
   o   PR 51974 - Report communication outages
   o   PR 53281  - Restrict MAR Combined I&Q Usage