Apr_06_2000_M258.txt Shift M258 Start at 2000:097:18:00:00 GMT = 2000 Apr 06 2:00pm EDT End 2000 Apr 06 6:00pm EDT See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_06_2000_M258.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running APR0400B, TOO load, finish observing MCG -6-30-15 with ACIS-S + HETG, obsid 433. Perform calibration observation 62093 then observe CYG X-3 (TOO) with ACIS-S + HETG, obsid 426, ending at 098:0117 Major increase in ACE proton level near noon today. ACIS telecon at 4:00pm, will decide what to do about high ACE low energy proton levels now seen. Telecon result: Decided that the current level of accumulation would be acceptable. Next alert level will be if instantaneous ACE proton flux in 130 - 214 keV channel goes up to 300,000 particles/cm2-s-ster-MeV. ORBITAL EVENTS: 2000:096:04:47:34.454 91 EPERIGEE ORBIT PERIGEE 2000:097:12:31:46.991 92 EAPOGEE ORBIT APOGEE 2000:098:20:14:59.823 92 EPERIGEE ORBIT PERIGEE 2000:100:03:59:45.416 93 EAPOGEE ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift LOS 097:1800 AOS DSS-46 (Canberra) 097:2145 All is nominal (see note 1) 426 End of shift 097:2200 NOTES/ISSUES/PROBLEMS --------------------- 1) Chandra's state at 097:2145 was: WAS EXPECTED PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 3 3 RA = 308.123646 deg 308.12365 DEC = 40.941440 deg 40.94144 ROLL = 80.388080 deg 80.38807 Format = 2 2 OBSID = 426 426 SIM FA = -467 -468 SIM TSC = 75623 75624 HETGA = 6.33 deg (IN) IN HETGB = 6.33 deg (IN) IN LETGA = 80.21 deg (OUT) OUT LETGB = 79.08 deg (OUT) OUT EPHIN A-leak = 0.1440 B-leak = 0.0240 ACE Proton Flux = 81800 (2 hr avg in 130-214 keV proton channel) Fluence (130-214KeV) = 5.9E+8 LT 3.6E+8 Radiation Level EPHIN Geom = LARG (see above discussion of ACE) E1300 = 2 LT 1318.52 (RADMON P4GM = 61 LT 3542.40 Triggers) P41GM = 0 LT 100.00 HRC SP PS = ON IM PS = OFF SP Top Step = 43 SP Bot Step = 54 Shield 1 HV = OFF Shield 2 HV = ON Shield 2 Stp = 8 Valid Event Rate 1 = 0 Valid Event Rate 2 = 0 Shield Event Rates = 3600 ACIS FP Temp = -119.9 Cold Radiator = -127.9 DEA Pwr = 43.2 DPA Pwr = 38.9