PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2002-01-09 NOTE = "MGS RST Instrument Health Report HEA2009A.TXT" END_OBJECT = TEXT END Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 2002-01-07T00:00:05.457 Last SCET: 2002-01-07T23:59:57.444 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- F-0190 HGA_AZ_ANG 3838 3892 9.37E-01 9.50E-01 9.42E-01/4.52E-05 2687 F-0195 HGA_EL_ANG -11233 11089 -2.74E+00 2.71E+00 2.68E-02/3.19E-02 2687 L-0034 MOT1_RANGING 0 0 5378 L-0036 MOT1_TLM_MOD 0 0 5378 L-0037 MOT1_USO_ENA 0 0 5378 L-0044 MOT2_RANGING 1 1 5378 L-0046 MOT2_TLM_MOD 0 1 5378 L-0047 MOT2_USO_ENA 1 1 5378 L-0053 RF_SW_OSC 2 2 5378 L-0060 TWTA1_FILMNT 0 0 5378 L-0061 TWTA1_HV 0 0 5378 L-0070 TWTA2_FILMNT 1 1 5378 L-0071 TWTA2_HV 0 1 5378 L-0080 USO_PWR 0 0 5378 L-0090 KaBLE_STAT 0 0 5378 L-0091 KaBLE_ENABLE 1 1 5378 L-0111 MOT1_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/8.16E-07 5378 L-0121 MOT2_RCV_AGC 141 255 -1.53E+02 -1.19E+02 -1.37E+02/1.84E-01 5378 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.83E-02/1.73E-05 5378 L-0132 TWTA1_ANOD_V 0 1 -1.00E+03 -1.00E+03 -1.00E+03/7.84E-03 671 L-0141 TWTA2_HLX_I 17 43 2.86E-01 8.05E-01 6.69E-01/2.25E-03 5378 L-0142 TWTA2_ANOD_V 62 230 -8.64E+02 -5.28E+02 -7.94E+02/5.11E+00 671 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/2.51E-04 672 L-0201 USO_OVEN_V 130 132 2.60E+00 2.64E+00 2.62E+00/2.06E-04 672 T-0302 EPC1_T 172 183 1.30E+00 5.68E+00 3.46E+00/4.56E-02 672 T-0303 EPC2_T 172 183 1.30E+00 5.68E+00 3.79E+00/3.79E-02 672 T-0310 RF_ISOLTR1_T 225 229 -1.15E+00 3.13E+00 6.93E-01/1.24E-02 5378 T-0311 RF_ISOLTR2_T 216 224 4.11E+00 1.09E+01 7.88E+00/2.33E-02 5378 T-0312 TWT1_T 224 229 -1.15E+00 4.11E+00 1.78E+00/5.43E-02 672 T-0313 TWT2_T 209 227 1.06E+00 1.56E+01 1.10E+01/1.47E-01 672 T-0315 USO_T 130 133 2.38E+01 2.47E+01 2.42E+01/8.48E-03 672 T-0316 KA_AMP_T 210 217 1.01E+01 1.50E+01 1.27E+01/3.28E-02 672 L-0200, L-0201, and T-0315 are nominal. Open Loop Data ============== Data Collection --------------- We have transferred the following RSR open loop data to Stanford: YYYY/DDD DSS RSR RSR CH KSPS BT REC RECS RSR MAX START STOP ID RS LEN FILE NAME SNR -------- --- -------- -------- --- -- ---- -- ----- ----- ------------ ----- 2002/008 54 11:44:00 11:54:00 3 1 2 16 8260 601 2008114E.RSR 53.3 2002/008 54 14:15:00 14:25:00 3 1 2 16 8260 601 20081415.RSR 53.4 2002/008 54 15:39:00 15:49:00 3 1 2 16 8260 601 20081539.RSR 53.3 2002/008 54 16:12:00 16:23:00 3 1 2 16 8260 661 20081612.RSR 53.4 2002/008 54 17:37:00 17:47:00 3 1 2 16 8260 601 20081737.RSR 53.5 2002/008 54 20:08:00 20:18:00 3 1 2 16 8260 601 20082008.RSR 53.8 2002/008 54 21:32:00 21:42:00 3 1 2 16 8260 601 20082132.RSR 52.7 2002/009 45 02:01:00 02:11:00 3 1 2 16 8260 601 20090201.RSR 53.6 2002/009 45 03:25:00 03:35:00 3 1 2 16 8260 601 20090325.RSR 54.7 2002/009 45 03:59:00 04:09:00 3 1 2 16 8260 601 20090359.RSR 54.3 2002/009 45 05:23:00 05:33:00 3 1 2 16 8260 601 20090523.RSR 54.3 2002/009 45 07:54:00 08:05:00 3 1 2 16 8260 661 20090754.RSR 54.3 2002/009 45 09:19:00 09:29:00 3 1 2 16 8260 601 20090919.RSR 54.8 2002/009 45 09:52:00 10:02:00 3 1 2 16 8260 601 20090952.RSR 54.3 2002/009 45 11:16:00 11:26:00 3 1 2 16 8260 601 20091116.RSR 53.1 Anomalies --------- Data from a DSS 25 pass (occultations 12686i through 12687i, start times 2002/008-21:32:00 through 23:30:00) have not been found. We have contacted Data Control, and they are investigating. The HGA rewind continues to modulate ingress occultations, but the signature is essentially indistinguishable from other effects by the end of the occultations listed above. Ingress occultations begin with 12681i (DSS 54, start time 2002/008-11:44:00), repeat approximately every 117 minutes, and end with 12693i (DSS 45, start time 2002/009-11:16:00). Joe Twicken has noted amplitude and frequency fluctuations in data collected from 12455e (2001/354-22:46:00). Similar events can be found in egress occultations as soon as RSR data were collected (2001/347) and as late as the end of the year. The anomaly seems to drift earlier (with respect to egress) as time moves forward; it is not visible in data being collected today. In terms of the signal amplitude, there is an initial rise, a drop below the original baseline amplitude, and then a recovery to the baseline. The amplitude change is about 1/3 dB (peak-to-peak) and the duration is 30-40 sec (see example in Figure HEA2009A.PS1). In frequency, the maximum deviation is about 50 mHz and the interval over which it can be discerned is about 10 sec. Spot checks of data and comparison against SOE files suggest correlation with solar array activity. SAM/SAP commands are issued 30-40 sec before the anomaly appears. Adjustments in solar array orientation would cause subtle changes in orientation of the spacecraft bus which, in turn, could require that the HGA pointing be changed. The following table shows some of the time relationships for three egress occultations. (1) Year/Day 2001/347 2001/354 2001/364 (2) DSS 45 25 15 (3) Occultation 12362e 12455e 12566e (4) Begin RSR Recording 08:13:00 22:46:00 00:37:00 (5) Egress - SOE 08:14:51 22:47:20 00:38:42 (6) - actual 08:15:05 22:47:19 00:38:39 (7) Anomaly Begin 08:18:53 22:49:12 00:38:49 (8) Anomaly End 08:19:30 22:49:50 00:39:26 (9) SAM/SAP Command 08:18:22 22:48:40 00:38:12 Line (9) minus Line (5) 03:29 01:20 -00:30 Line (9) minus Line (7) :31 :32 :37 Line (9) minus Line (8) 1:08 1:10 1:14 Although there is a 6 sec drift of the SAM/SAP command with respect to the anomalous radio behavior over this 17-day period, that drift is small compared with the drift of the SAM/SAP command times with respect to the egress occultation time (239 sec). The impact of these anomalies on recovery of atmospheric profiles will have to be determined later. Joe has determined that using the CK (spacecraft attitude) and AGK (HGA pointing) kernels does not remove much of the anomaly. Whether future instances of SAM/SAP commands within the occultation period can be avoided will also have to wait for further study. Closed Loop Data ================ Data Collection --------------- We have obtained the following files from OSCAR and EPIC: Original File Name Name on SOPC ------------------------------------ ------------ ODF: 02005O007_10S.SJO;1 2005007A.ODF ODF: 02007O008_10S.SJO;1 2007008A.ODF EOP: 020108-eop.long 20202091.EOP EOP: 020108-eop.short 10902091.EOP Ancillary Data ============== Data Collection --------------- We have obtained the following files from the FIS: Original File Name Name on SOPC ------------------------------------ ------------ AMD: amdgen.02-008.out 2006007A.AMD OPT: optg_m_011228_OD12545-12630_rec_V1 1362004A.OPT SAK: mgs_solar_array_2002-007.ck 2007007A.SAK SPK: spk_m_011228_OD12545-12630_rec_V1 1362004A.SPK TCK: mgs_spice_c_kernel_2002-007.ck 2007007A.TCK SOE: mm156a.10.tsoe 2002013B.SOE We have obtained the following files from NAIF: Original File Name Name on SOPC ------------------------------------ ------------ AGK: mgs_hga_ck_2001-12-30.bc 1364364A.AGK Figure Caption ============== HEA2009A.PS1: One-second average sample power measurements from DSS 25 RSR data collected starting 2001/347-21:57:00. The egress occultation is at 21:59:34 (21.993 hours). At 22:02:34 (22.043 hours) a solar array adjustment begins; about 25 s later the radio carrier rises about 0.18 dB, falls, and then returns to its original level. The noise baseline (no carrier) is at about -26 dB. At 22.162 hours telemetry is turned on and the carrier level drops. Figures ======= Plot(s) illustrate some of the points made in the text. Each plot is a PostScript file, created and printable on our SOPC. For report text file HEAydddC.TXT Figure N will be labeled HEAydddC.PSN and sent as the N+1st e-mail message of a set. We assume that you can strip off the e-mail headers and either display or print copies of the figures on a machine in your area. People who have indicated that they cannot handle these files by e-mail are not included in the e-mail distribution of figures.