PDS_VERSION = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1997-04-03 NOTE = "MGS RST Instrument Health Report HEA7093A.TXT" END_OBJECT = TEXT END Errata ====== HEA7088A.TXT indicated that KaBLE/USO Test data (97/088) had come from DSS 65; in fact, those data came from DSS 15. Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 1997-04-02T00:00:00.056 Last SCET: 1997-04-02T11:06:48.554 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- L-0037 MOT1_USO_ENA 0 0 9681 L-0047 MOT2_USO_ENA 1 1 9681 L-0053 RF_SW_OSC 2 2 9679 L-0060 TWTA1_FILMNT 0 0 9681 L-0061 TWTA1_HV 0 0 9680 L-0070 TWTA2_FILMNT 1 1 9680 L-0071 TWTA2_HV 0 0 9681 L-0080 USO_PWR 0 0 9681 L-0090 KaBLE_STAT 0 1 9681 L-0091 KaBLE_ENABLE 0 0 9680 L-0111 MOT1_RCV_AGC 174 255 -1.53E+02 -1.27E+02 -1.31E+02/3.16E-02 5233 L-0121 MOT2_RCV_AGC 127 255 -1.53E+02 -1.14E+02 -1.17E+02/4.83E-02 5233 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.83E-02/1.89E-05 5233 L-0132 TWTA1_ANOD_V 0 2 -1.00E+03 -1.00E+03 -1.00E+03/5.27E-03 4547 L-0141 TWTA2_HLX_I 38 42 7.05E-01 7.85E-01 7.41E-01/2.15E-04 5233 L-0142 TWTA2_ANOD_V 58 63 -8.72E+02 -8.62E+02 -8.67E+02/2.00E-02 4547 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/1.09E-04 4546 L-0201 USO_OVEN_V 124 127 2.48E+00 2.54E+00 2.50E+00/1.09E-04 4546 T-0302 EPC1_T 127 146 1.64E+01 2.46E+01 1.77E+01/4.66E-02 1210 T-0303 EPC2_T 120 149 1.51E+01 2.77E+01 1.63E+01/7.13E-02 1210 T-0310 RF_ISOLTR1_T 189 214 1.23E+01 2.49E+01 1.48E+01/3.81E-02 5232 T-0311 RF_ISOLTR2_T 179 198 2.12E+01 2.86E+01 2.27E+01/2.55E-02 5232 T-0312 TWT1_T 188 215 1.16E+01 2.53E+01 1.41E+01/6.08E-02 1210 T-0313 TWT2_T 174 195 2.25E+01 3.03E+01 2.42E+01/3.92E-02 1210 T-0315 USO_T 170 173 1.21E+01 1.30E+01 1.27E+01/5.38E-03 1210 T-0316 KA_AMP_T 159 205 1.78E+01 3.56E+01 1.96E+01/4.66E-02 2322 L-0200, L-0201, and T-0315 are nominal. Open Loop Data ============== Data Collection --------------- No new data. Anomalies --------- 97092: Amplitude modulations of up to 2 dB peak-to-peak and on several time scales can be seen in plots of raw sample power vs time. The most noticeable is a quasi-periodic component with period 6-8 minutes. Analyses -------- 97088: Joe Twicken has completed his analysis of the KaBLE USO Test data. His report is reproduced below. The Allan Deviation curves are not clearly separable (Figure HEA7093A.PS1) though a simple-minded interpretation of the data (see table in figure caption) suggests that KaBLE ON and referenced to the USO is the worst choice while KaBLE ON and referenced to VCO1 may be the best choice. Why these two cases stand out is not obvious, however, so continued thought and possibly more tests are desirable. Joe's report: Data from the KaBLE mode tests on 92/088 were collected at DSS 15 in six half-hour segments covering the total time span 04:22:38-07:22:38. KaBLE went through six combinations of ON/OFF and frequency reference: (a) 04:22:38 Test begins. KaBLE off. S4 switch at B (MOT 2 VCO) (b) 04:52:38 KaBLE on. S4 same. (c) 05:22:38 S4 switch at A (MOT 1 VCO) (d) 05:52:38 KaBLE off. S4 same. (e) 06:22:38 S4 switch at C (USO) (f) 06:52:38 KaBLE on. S4 same The open-loop data were acquired in sampling mode 2 at 5 ksps with 12 bits per sample. The data were steered with the spk_c_970129-970510 SP-kernel file. The product creation date for this kernel was 97/083. The Allan Deviation for each of the segments is as follows (all AD values are times 1e-13): t, sec AD-a AD-b AD-c AD-d AD-e AD-f 0.4096 3.3486 3.1405 3.3121 3.2476 3.4243 3.4917 1.6384 1.8247 1.9014 1.7420 1.9206 2.1654 2.4809 3.2768 1.5305 1.7388 1.4423 1.6557 1.7641 1.8549 6.5536 1.2461 1.4239 1.0009 1.2077 1.0002 1.3306 26.2144 0.9236 0.9019 0.8943 1.0516 0.8454 0.9296 The frequency stability was comparable in all cases. The worst overall performance was case (f) above with KaBLE on and S4 switch at C (USO). At the shorter integration times, the next worst performance was case (e) above with KaBLE off and S4 switch at C (USO). At the middle to long integration times, the performance of case (b) with KaBLE on and switch S4 at B (MOT 2 VCO) was also amongst the worse. Closed Loop Data ================ Data Collection --------------- We have obtained the following files from OSCAR and EPIC: Original File Name Name on SOPC ------------------------------ ------------ ATDF: ODF: 97092C093.DAT;1 7092093A.ODF IONCAL: IONCAL_94_9703_9704_DOPR.CSP;1 7060121A.ION TROPCAL: TROPCAL_94_9703_DOPR.CSP;1 7060091A.TRO WEATHER: UTPM: EOP: 970402-eop.long 20207173.EOP 970402-eop.short 61737173.EOP Figure Captions =============== HEA7093A.PS1: Allan Deviation vs integration time for six combinations of KaBLE status and frequency reference. The numerical values are given in the text. Ranking of curves from highest (1) to lowest (6) Allan Deviation is shown in the table below. A very crude index of overall stability can be obtained by summing the rankings (a large sum indicates better stability). --------------------------------------------------------------------- |Segment | (a) | (b) | (c) | (d) | (e) | (f) | |Start Time |04:22:38|04:52:38|05:22:38| 05:52:38|06:22:38|06:52:38| |KaBLE | OFF | ON | ON | OFF | OFF | ON | |Freq Ref | B/VCO2 | B/VCO2 | A/VCO1 | A/VCO1 | C/USO | C/USO | |--------------+--------+--------+--------+---------+--------+--------| |Int Time, sec | | | | | | | |------------- | | | | | | | | 0.4096 | 3 | 6 | 4 | 5 | 2 | 1 | | 1.6384 | 5 | 4 | 6 | 3 | 2 | 1 | | 3.2768 | 5 | 3 | 6 | 4 | 2 | 1 | | 6.5536 | 3 | 1 | 5 | 4 | 6 | 2 | | 26.2144 | 3 | 4 | 5 | 1 | 6 | 2 | |--------------+--------+--------+--------+---------+--------+--------| |Sum of Ranks | 19 | 18 | 26 | 17 | 18 | 7 | --------------------------------------------------------------------- Figures ======= Plot(s) illustrate some of the points made in the text. 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