PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2001-08-22 NOTE = "MGS RST Instrument Health Report HEA1234A.TXT" END_OBJECT = TEXT END Miscellaneous ============= The following was relayed from Oliver Walthall and Gene Brower by Aseel Anabtawi. MGS returned to normal mapping operations on day 226 at 23:45. An expired mapping ephemeris caused gradually worsening attitude knowledge, whenever the spacecraft was in CSA Backup mode. In Primary Map mode, the MHSA provides the Mars pointing attitude knowledge. In CSA Backup mode, which was entered only during ROTO sequences for 7-14 Aug, the primary means of determining Mars nadir pointing attitude knowledge is the mapping ephemeris. It was not until DOY 225 (13 Aug) that problems with attitude knowledge were apparent. A separate ISA has been written for the large attitude error seen at the end of the ROTO sequence, on DOY 225. Attitude knowledge had worsened the following day, at the end of a ROTO sequence, to the point that gyro biases were not updating accurately, STAREX had problems identifying stars, and eventually HGA comm was lost. Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 2001-08-20T00:00:03.221 Last SCET: 2001-08-20T23:59:59.208 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- F-0190 HGA_AZ_ANG 5272 5315 1.29E+00 1.30E+00 1.29E+00/4.22E-05 2688 F-0195 HGA_EL_ANG -11233 11089 -2.74E+00 2.71E+00 -4.90E-01/3.28E-02 2688 L-0034 MOT1_RANGING 0 0 5376 L-0036 MOT1_TLM_MOD 0 0 5376 L-0037 MOT1_USO_ENA 0 0 5376 L-0044 MOT2_RANGING 1 1 5376 L-0046 MOT2_TLM_MOD 1 1 5376 L-0047 MOT2_USO_ENA 1 1 5376 L-0053 RF_SW_OSC 2 2 5376 L-0060 TWTA1_FILMNT 0 0 5376 L-0061 TWTA1_HV 0 0 5377 L-0070 TWTA2_FILMNT 1 1 5377 L-0071 TWTA2_HV 0 1 5376 L-0080 USO_PWR 0 0 5376 L-0090 KaBLE_STAT 0 0 5376 L-0091 KaBLE_ENABLE 1 1 5377 L-0111 MOT1_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/8.16E-07 5376 L-0121 MOT2_RCV_AGC 131 255 -1.53E+02 -1.15E+02 -1.43E+02/2.04E-01 5376 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.83E-02/1.38E-05 5376 L-0132 TWTA1_ANOD_V 0 1 -1.00E+03 -1.00E+03 -1.00E+03/1.10E-02 672 L-0141 TWTA2_HLX_I 16 42 2.66E-01 7.85E-01 5.48E-01/2.78E-03 5376 L-0142 TWTA2_ANOD_V 0 229 -9.88E+02 -5.30E+02 -7.00E+02/6.34E+00 672 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/2.38E-04 672 L-0201 USO_OVEN_V 129 132 2.58E+00 2.64E+00 2.60E+00/2.26E-04 672 T-0302 EPC1_T 182 196 -4.19E+00 1.71E+00 -1.17E+00/6.34E-02 672 T-0303 EPC2_T 180 193 -2.86E+00 2.50E+00 -2.47E-01/5.97E-02 672 T-0310 RF_ISOLTR1_T 229 233 -6.05E+00 -1.15E+00 -3.22E+00/8.80E-03 5376 T-0311 RF_ISOLTR2_T 221 233 -6.05E+00 6.87E+00 1.04E+00/4.45E-02 5376 T-0312 TWT1_T 227 231 -3.52E+00 1.06E+00 -1.68E+00/3.80E-02 672 T-0313 TWT2_T 215 232 -4.77E+00 1.16E+01 3.16E+00/2.17E-01 672 T-0315 USO_T 135 138 2.23E+01 2.32E+01 2.26E+01/7.15E-03 672 T-0316 KA_AMP_T 214 219 8.56E+00 1.23E+01 1.03E+01/3.09E-02 672 L-0200, L-0201, and T-0315 are nominal. Open Loop Data ============== Data Collection --------------- We have transferred the following open loop data to Stanford: YYYY/DDD DSS DSP SAMP BW DSP BIT REC RECS RECS MAX START STOP RATE MODE RESN LEN MSSG SNR -------- --- -------- -------- ---- ---- ---- ---- ---- ----- ---- ----- 2001/217 43 07:44:36 08:23:15 50K 20K 2 8 4166 57989 0 --- Only noise was captured during this recording; hence, the MAX SNR is not meaningful. Two additional files have been transferred to Stanford by Aseel Anabtawi, but neither has gone through our quick look processing yet. All three of these files were collected using the DSP; FSR data will be transferred later. Closed Loop Data ================ Data Collection --------------- We have obtained the following files from OSCAR and EPIC: Original File Name Name on SOPC -------------------------------- ------------ ODF: 01232O233_10S.SJO;1 1232233A.ODF TROPCAL: ATC01AUG.CSP;7 1213235A.TRO EOP: 010821-eop.long 20201316.EOP EOP: 010821-eop.short 03161316.EOP Ancillary Data ============== Data Collection --------------- We have obtained the following files from the FIS: Original File Name Name on SOPC ------------------------------------ ------------ OPT: optg_m_010812_OD10857-10941_rec_V1 1224231A.OPT SAK: mgs_solar_array_2001-232.ck 1232232A.SAK SPK: spk_m_010812_OD10857-10941_rec_V1 1224231A.SPK TCK: mgs_spice_c_kernel_2001-232.ck 1232232A.TCK We have obtained the following files from NAIF: Original File Name Name on SOPC ------------------------------------ ------------ AGK: mgs_hga_ck_2001-08-12.bc 1224224A.AGK