Shift report M190 January 29 2000, GMT 22:00:00, EST January 29, 2000 17:00 PLAN: Execute CAP 548 to set the ACIS Focal Plane temperature to -120 C for good !!!! Once again all the ACIS realtime activities went "exactly as planned." 1) CAP 548 sends one command to change the focal plane setpoint to -121 C. The command was sent at 029:22:13. The satellite is at 42,000 km. 2) ACIS temperatures GMT FP Temp 1CR[AB]T 1WR[AB]T 1CB[AB]T 029:22:00 AOS on DSN 24 (Goldstone 34m) 029:22:00 -109.2 -120.7/-118.3 -82.0/-82.0 -62.4/-59.9 029:22:13 Command sent to set FP to -121 C 029:22:20 -110.0 -120.7/-118.3 -82.0/-82.0 -62.4/-59.9 029:22:22 Clear and disable SCS 249, CAP 548 complete 029:22:31 -111.1 -120.7/-120.7 -82.0/-82.0 -62.4/-59.9 029:22:44 -112.1 -120.7/-120.7 -82.0/-82.0 -62.4/-59.9 029:23:02 -113.1 -120.7/-120.7 -82.0/-82.0 -62.4/-59.9 029:23:25 -114.1 -120.7/-120.7 -82.0/-82.0 -62.4/-59.9 029:23:30 OC reports the SSR dump is complete, no problems 029:23:50 -114.7 -120.7/-120.7 -82.0/-82.0 -62.4/-59.9 030:00:00 LOS 3) ACE rates ACE proton and electron rates have been very high and almost to the point of triggering our safing threshold. The proton rates finally appear to be decreasing; as of 29:2120 the 112-187 keV rate had decreased to 535.0 particles/cm2-s-ster-MeV. Unfortunately, we are experiencing some data dropouts from ACE. At 29:2210, 112-187 keV rate is 373.0 particles/cm2-s-ster-MeV. At 29:2250, 112-187 keV rate is 480.0 particles/cm2-s-ster-MeV. At 29:2320, 112-187 keV rate is 304.0 particles/cm2-s-ster-MeV. 4) Chandra state at the beginning of the pass: UTC 2000:029:22:02:01 (Sat Jan 29) f_ACE 5.35e+02 F_ACE 0.00e+00 R km 53541D OBT 2000:029:22:01:18 CTUVCDU 8464694 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 65570478.08 ONLVCDU 8464688 OBC Errs 0 OBSID 62198 EPState SUN SIM TTpos -99616 HETG Angle 80.6 PCADMODE NPNT RA 350.640 Bus V 30.40 SIM FApos -467 LETG Angle 78.7 PCONTROL NPNT Dec 58.879 Bus I 28.74 AOFSTAR GUID Roll 322.800 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTNNN Dith Yang -6.69 Yaw Rate -0.01 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 1.23 Pitch Rate -0.03 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.05 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.11 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta 6.55 Batt 2 SOC 100.00% ACIS Stat7-0 66 Avg OBA Temp 50.97 SA Resolv 83.39 Batt 3 SOC 100.00% Cold Rad -120.7 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 13.14 HRMA power 29.90 -Y SA Amps 14.49 EPHIN Geom LARG OBA power 124.50 +Y SA Temp 116.95 E1300 1024 -Y SA Temp 117.68 P4GM 0 Roll Mom. -0.405 P41GM 2097152 Pitch Mom. 4.044 UpL Cmd Acc 29500 A-Leak 0.4360 Yaw Mom. 2.221 Cmd Rej A 10 B-Leak 0.0680 NOTES: PROBLEMS: ACIS: Paul Plucinsky, Anya Plucinsky, Royce Buehler