PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2002-07-10 NOTE = "MGS RST Instrument Health Report HEA2191A.TXT" END_OBJECT = TEXT END Miscellaneous ============= Dale Howell (LMCO) reports the spacecraft fuel and mass status as follows. These are the first estimates we have received since last August. Frank Lemoine compiled the summary through 2001-08-07. Date Mass dm/dt Source kg g/day ---------- ------ ------ -------- 2000-12-19 710.00 -28.85 Eckart 2001-01-15 709.23 -29.14 Eckart 2001-01-25 708.90 -35.70 Eckart 2001-03-15 707.19 -35.71 Eckart 2001-04-18 706.20 -27.87 Eckart 2001-05-14 705.40 -29.5 Walthall 2001-06-25 704.55 -26.5 Eckart 2001-07-13 703.98 -27.6 Eckart 2001-08-07 703.21 -26.4 Eckart For the period 2002/035 to 2002/079: ------------------------------------ 21.68 Kg Hydrazine Remaining 5.26 kg Hydrazine Unusable 16.42 kg Usable Hydrazine Remaining 0.3747 kg used over last 44 days. Average daily usage: 8.52 g/day Relay-16 mode: 4.5 g/day Cmode: 22.17 g/day Spacecraft Mass = 674.52 Kg (dry mass) + 5.289 Kg (Ox) + 21.68 Kg (Fuel) = 701.49 Kg (Total Mass) For the period 2002/079 to 2002/112: ------------------------------------ 21.34 Kg Hydrazine Remaining 5.26 kg Hydrazine Unusable 16.08 kg Usable Hydrazine Remaining 0.3345 kg used over last 33 days. Average daily usage = 10.14 g/day preCmode (02-079 to 02-092): 3.72 g/day Cmode (02-092 to 02-105): 19.40 g/day postCmode (02-105 to 02-112): 4.85 g/day Spacecraft Mass = 674.52 Kg (dry mass) + 5.289 Kg (Ox) + 21.34 Kg (Fuel) = 701.15 Kg (Total Mass) For the period 2002/112 to 2002/156: ------------------------------------ 21.06 Kg Hydrazine Remaining 5.26 kg Hydrazine Unusable 15.80 kg Usable Hydrazine Remaining 0.2785 kg used over last 44 days. Average daily usage = 6.33 g/day Spacecraft Mass = 674.52 Kg (dry mass) + 5.289 Kg (Ox) + 21.06 Kg (Fuel) = 700.87 Kg (Total Mass) For the period 2002/156 to 2002/182: ------------------------------------ 20.89 Kg Hydrazine Remaining 5.26 kg Hydrazine Unusable 15.63 kg Usable Hydrazine Remaining 0.1737 kg used over last 26 days. Average daily usage = 6.68 g/day Spacecraft Mass = 674.52 Kg (dry mass) + 5.289 Kg (Ox) + 20.89 Kg (Fuel) = 700.70 Kg (Total Mass) Dale adds the following comments, in a (slightly edited) exchange relayed by Frank: Right now we're running 6-7 grams/day. With the implementation of nadir slews we should see that drop over the next few weeks, but I'm not sure by how much. During some occultations we will slew the spacecraft to nadir and take advantage of gravity gradient torques to desat the spin-axis momentum. We will slew to nadir after occultation ingress, and get back to Relay-16 before occultation egress. Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 2002-07-08T00:00:03.061 Last SCET: 2002-07-08T23:59:59.048 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- F-0190 HGA_AZ_ANG 6424 10561 1.57E+00 2.58E+00 2.42E+00/7.95E-03 1849 F-0195 HGA_EL_ANG -11233 11089 -2.74E+00 2.71E+00 -2.85E-01/4.04E-02 1849 L-0034 MOT1_RANGING 0 0 3701 L-0036 MOT1_TLM_MOD 0 0 3702 L-0037 MOT1_USO_ENA 0 0 3701 L-0044 MOT2_RANGING 1 1 3701 L-0046 MOT2_TLM_MOD 0 1 3702 L-0047 MOT2_USO_ENA 1 1 3701 L-0053 RF_SW_OSC 2 2 3702 L-0060 TWTA1_FILMNT 0 0 3701 L-0061 TWTA1_HV 0 0 3701 L-0070 TWTA2_FILMNT 0 1 3701 L-0071 TWTA2_HV 0 1 3701 L-0080 USO_PWR 0 0 3701 L-0090 KaBLE_STAT 0 0 3701 L-0091 KaBLE_ENABLE 1 1 3701 L-0111 MOT1_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/0.00E+00 3701 L-0121 MOT2_RCV_AGC 173 255 -1.53E+02 -1.32E+02 -1.48E+02/1.28E-01 3701 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.82E-02/2.88E-05 3701 L-0132 TWTA1_ANOD_V 0 1 -1.00E+03 -1.00E+03 -1.00E+03/1.93E-02 463 L-0141 TWTA2_HLX_I 17 42 2.86E-01 7.85E-01 5.50E-01/3.38E-03 3701 L-0142 TWTA2_ANOD_V 62 229 -8.64E+02 -5.30E+02 -7.00E+02/7.60E+00 463 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/3.05E-04 462 L-0201 USO_OVEN_V 127 130 2.54E+00 2.60E+00 2.58E+00/3.74E-04 462 T-0302 EPC1_T 186 196 -4.19E+00 8.59E-02 -2.11E+00/4.45E-02 464 T-0303 EPC2_T 182 193 -2.86E+00 1.71E+00 -4.41E-01/5.97E-02 464 T-0310 RF_ISOLTR1_T 229 233 -6.05E+00 -1.15E+00 -3.54E+00/9.96E-03 3702 T-0311 RF_ISOLTR2_T 224 233 -6.05E+00 4.11E+00 7.15E-02/3.28E-02 3702 T-0312 TWT1_T 228 232 -4.77E+00 -2.48E-02 -2.46E+00/3.76E-02 464 T-0313 TWT2_T 218 233 -6.05E+00 9.37E+00 2.06E+00/2.15E-01 464 T-0315 USO_T 145 148 1.94E+01 2.03E+01 1.99E+01/9.31E-03 464 T-0316 KA_AMP_T 215 219 8.56E+00 1.16E+01 9.98E+00/3.01E-02 462 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 -------- --- -------- -------- --- -- ---- -- ----- ----- ------------ ----- 2002/188 25 16:35:00 16:46:00 3 1 2 16 8260 661 2188163F.RSR 47.9 2002/190 45 01:56:00 02:07:00 3 1 2 16 8260 661 21900156.RSR 48.8 2002/190 45 03:54:00 04:04:00 3 1 2 16 8260 601 21900354.RSR 48.9 2002/190 45 05:52:00 06:02:00 3 1 2 16 8260 601 21900552.RSR 48.0 2002/190 24 17:38:00 17:48:00 4 1 2 16 8260 601 21901738.RSR 47.4 2002/190 24 19:36:00 19:46:00 4 1 2 16 8260 601 21901936.RSR 46.8 2002/190 24 21:33:00 21:44:00 4 1 2 16 8260 661 21902133.RSR 46.7 2002/190 24 23:31:00 23:41:00 4 1 2 16 8260 601 21902331.RSR 47.5 Anomalies --------- The occultation from 2002/188 was collected outside the regular DSS 25 pass and was not included in our normal query. We have since made a special query after being advised by Aseel Anabtawi of it's existence. The other DSS 25 measurements from that pass were reported in HEA2189A.TXT. The first measurement from DSS 45 (occultation 14901i, start time 2002/189-23:59:00) was lost as the RSR was not configured in time. The rest of the measurements from DSS 45, occultations 14902i through 14904i, were successfully captured. Data from DSS 24 occultations 14911i (start time 2002/190-19:36:00) had a -0.2 dB ramp in the free-space carrier amplitude over the measurement (not in noise level however). All of the measurements collected from DSS 24 (occultations 14910i through 14913i, start times 2002/190-17:38:00 through 23:31:00) had carrier gain and max SNR values about 1 dB lower than expected. The following occultation was collected on two different antennas: Occultation Start Date/Time DSS #1 DSS #2 ----------- ----------------- ------ ------ 14885i 2002/188-16:35:00 54 25 Closed Loop Data ================ Data Collection --------------- We have obtained the following files from EPIC: Original File Name Name on SOPC ------------------------------------ ------------ EOP: 020709-eop.long 20202273.EOP EOP: 020709-eop.short 12722273.EOP Ancillary Data ============== Data Collection --------------- We have obtained the following files from the FIS: Original File Name Name on SOPC ------------------------------------ ------------ AMD: amdgen.02-191.out 2189190A.AMD OPT: optg_m_020630_OD14803-14896_rec_V1 2181189A.OPT SPK: spk_m_020630_OD14803-14896_rec_V1 2181189A.SPK We have obtained the following files from NAIF: Original File Name Name on SOPC ------------------------------------ ------------ AGK: mgs_hga_ck_2002-06-29.bc 2180180A.AGK AGK: mgs_hga_ck_2002-06-30.bc 2181181A.AGK MOLA POD Team Orbit Solutions ============================= Data Collection --------------- We have obtained the following files from GEODESY: Original File Name Name on SOPC ------------------------------------ ------------ GDN: gdn_ql18_203112245_203180110.tsp 2070077A.GDN