PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM STANDARD_DATA_PRODUCT_ID = HEA DATA_SET_ID = "MEX-M-MRS-1/2/3-EXT2-2402-V1.0" PRODUCT_ID = "M00SUE0L1A_HEA_101061845_00.TXT" PRODUCT_CREATION_TIME = 2012-10-08T13:54:33.000 PRODUCER_ID = "SUE" INSTRUMENT_HOST_ID = "MEX" OBJECT = TEXT PUBLICATION_DATE = 2010-04-28 NOTE = "DSN MEX Bistatic Radar Data Report" END_OBJECT = TEXT END Miscellaneous ============= This is the first report since HEAA117A.TXT. Open Loop Data ============== Data Collection --------------- We have completed quick-look processing on the following MEX RSR open loop bistatic radar data at Stanford: DOY DSS RSR BAND RSR CH KSPS BT REC RECS RSR MAX START STOP ID RS LEN FILE NAME SNR --- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ ----- 106 63 18:45:00 19:59:59 -/XR 4 3 25 16 25260 18000 A106184A.RSR 6.0 106 63 18:45:00 19:59:59 -/SR 3 3 25 16 25260 18000 A106184B.RSR 3.4 106 63 18:45:00 19:59:59 -/XL 2 3 25 16 25260 18000 A106184C.RSR 4.7 106 63 18:45:00 19:59:59 -/SL 1 3 25 16 25260 18000 A106184D.RSR 4.4 106 63 21:06:00 21:43:00 -/XR 4 3 25 16 25260 8884 A106210A.RSR 69.1 106 63 21:06:00 21:43:00 -/SR 3 3 25 16 25260 8884 A106210B.RSR 47.8 106 63 21:06:00 21:43:00 -/XL 2 3 25 16 25260 8884 A106210C.RSR 39.0 106 63 21:06:00 21:43:00 -/SL 1 3 25 16 25260 8884 A106210D.RSR 26.0 106 63 21:43:00 23:06:00 -/XR 4 3 25 16 25260 19924 A106214A.RSR 14.6 106 63 21:43:00 23:06:00 -/SR 3 3 25 16 25260 19924 A106214B.RSR 11.5 106 63 21:43:00 23:06:00 -/XL 2 3 25 16 25260 19924 A106214C.RSR 23.1 106 63 21:43:00 23:06:00 -/SL 1 3 25 16 25260 19924 A106214D.RSR 16.5 106 63 23:06:00 00:28:00 -/XR 4 3 25 16 25260 19684 A106230A.RSR 66.1 106 63 23:06:00 00:28:00 -/SR 3 3 25 16 25260 19684 A106230B.RSR 48.2 106 63 23:06:00 00:28:00 -/XL 2 3 25 16 25260 19684 A106230C.RSR 38.7 106 63 23:06:00 00:28:00 -/SL 1 3 25 16 25260 19684 A106230D.RSR 25.8 106 63 21:43:00 22:04:00 -/XR 4 4 100 16 20260 25220 A106214E.RSR 14.9 106 63 21:43:00 22:04:00 -/SR 3 4 100 16 20260 25220 A106214F.RSR 9.2 106 63 21:43:00 22:04:00 -/XL 2 4 100 16 20260 25220 A106214G.RSR 27.3 106 63 21:43:00 22:04:00 -/SL 1 4 100 16 20260 25220 A106214H.RSR 13.9 106 63 22:04:00 22:25:00 -/XR 4 4 100 16 20260 25220 A106220A.RSR 18.4 106 63 22:04:00 22:25:00 -/SR 3 4 100 16 20260 25220 A106220B.RSR 10.3 106 63 22:04:00 22:25:00 -/XL 2 4 100 16 20260 25220 A106220C.RSR 29.3 106 63 22:04:00 22:25:00 -/SL 1 4 100 16 20260 25220 A106220D.RSR 15.6 106 63 22:25:00 22:46:00 -/XR 4 4 100 16 20260 25220 A106222A.RSR 21.3 106 63 22:25:00 22:46:00 -/SR 3 4 100 16 20260 25220 A106222B.RSR 10.8 106 63 22:25:00 22:46:00 -/XL 2 4 100 16 20260 25220 A106222C.RSR 29.5 106 63 22:25:00 22:46:00 -/SL 1 4 100 16 20260 25220 A106222D.RSR 16.4 106 63 22:46:00 23:06:00 -/XR 4 4 100 16 20260 24020 A106224A.RSR 21.7 106 63 22:46:00 23:06:00 -/SR 3 4 100 16 20260 24020 A106224B.RSR 12.3 106 63 22:46:00 23:06:00 -/XL 2 4 100 16 20260 24020 A106224C.RSR 30.1 106 63 22:46:00 23:06:00 -/SL 1 4 100 16 20260 24020 A106224D.RSR 16.2 The X-Band echoes in the 25 kHz windows fell off the upper edge of the bandpass filter. Danny Kahan and Gene Goltz modified the times in my receiver tuning profile, but only after half of the observations had been completed. It should be possible to process the 100 kHz data to recover the science; but the volume is four times larger. The X-RCP analog-to-digital converter was saturated when the spacecraft HGA was pointed toward Earth. The FGAIN setting had been reduced from 65 dB to 60 dB, anticipating that the increasing Earth-Mars distance would make clipping unlikely. This appears to have been premature, and 65 dB will be used for future experiments. S-LCP sample power versus time dips by about 2.5 dB at about 22:31; the same dip (equal magnitude) is seen in both the 25 kHz and 100 kHz data, implying an LNA instability. The is no dip in the S-RCP data. There are significant fluctuations in background noise on the X-Band channels. The changes at the end of the pre-cal and before MINICAL #2 are correlated, suggesting that there is higher absorption along the ray path. In fact, there is a similar (but smaller) increase in S-RCP and S-LCP before MINICAL #2. During the time when both 25 kHz and 100 kHz data were collected, the X-RCP and X-LCP sample powers are well-correlated. The station reported only "overcast" at both the beginning and end of the pass. There are puzzling inconsistencies in noise levels within measurements on a single channel. For example, S-RCP appears to have its noise diode on throughout most of the pre-cal period, rather than only in the middle when the calibration procedure steps through S-Band configurations. Also, as the antenna moves to zenith between EOT and the beginning of the post-cal, the X-LCP noise power first dips by about 0.2 dB, then increases by 0.5 dB. Ordinarily, the noise power should decrease monotonically when going to zenith. There is neither a dip nor an increase in X-RCP power over the same time interval; and both S-Band channels show the expected 0.5 dB drop in noise power as the antenna moves to zenith. X-LCP sky power is higher at the end of the pre-cal than during the middle; and X-LCP ambient load power is higher in the middle of the pre-cal than at the beginning. These problems will be studied in conjunction with the NMC log to determine whether the desired configuration has been achieved at each stage.