PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM STANDARD_DATA_PRODUCT_ID = HEA DATA_SET_ID = "MEX-M-MRS-1/2/3-EXT2-2476-V1.0" PRODUCT_ID = "M00SUE0L1A_HEA_101701530_00.TXT" PRODUCT_CREATION_TIME = 2012-10-10T13:50:44.000 PRODUCER_ID = "SUE" INSTRUMENT_HOST_ID = "MEX" OBJECT = TEXT PUBLICATION_DATE = 2010-06-24 NOTE = "DSN MEX Bistatic Radar Data Report" END_OBJECT = TEXT END Miscellaneous ============= This is the first report since HEAA168A.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 --- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ ----- 170 63 15:30:00 16:40:00 -/XR 4 3 25 16 25260 16804 A170153A.RSR 4.0 170 63 15:30:00 16:40:00 -/SR 3 3 25 16 25260 16804 A170153B.RSR 4.1 170 63 15:30:00 16:40:00 -/XL 1 1 8 16 16260 8402 A170153C.RSR -1.2 170 63 15:30:00 16:40:00 -/SL 0 1 8 16 16260 8402 A170153D.RSR -1.6 170 63 17:51:00 18:28:00 -/XR 4 3 25 16 25260 8884 A170175A.RSR 65.6 170 63 17:51:00 18:28:00 -/SR 3 3 25 16 25260 8884 A170175B.RSR 45.0 170 63 17:51:00 18:28:00 -/XL 1 4 25 16 25260 8884 A170175C.RSR 39.8 170 63 17:51:00 18:28:00 -/SL 0 4 25 16 25260 8884 A170175D.RSR 24.5 170 63 18:28:00 19:15:00 -/XR 4 3 25 16 25260 11284 A170182A.RSR 16.1 170 63 18:28:00 19:15:00 -/SR 3 3 25 16 25260 11284 A170182B.RSR 6.4 170 63 18:28:00 19:15:00 -/XL 1 4 25 16 25260 11284 A170182C.RSR 21.2 170 63 18:28:00 19:15:00 -/SL 0 4 25 16 25260 11284 A170182D.RSR 8.9 170 63 19:15:00 20:04:00 -/XR 4 3 25 16 25260 11764 A170191A.RSR 61.8 170 63 19:15:00 20:04:00 -/SR 3 3 25 16 25260 11764 A170191B.RSR 44.2 170 63 19:15:00 20:04:00 -/XL 1 4 25 16 25260 11764 A170191C.RSR 32.9 170 63 19:15:00 20:04:00 -/SL 0 4 25 16 25260 11764 A170191D.RSR 22.3 170 63 20:04:00 21:00:00 -/XR 4 3 25 16 25260 13444 A170200A.RSR 5.2 170 63 20:04:00 21:00:00 -/SR 3 3 25 16 25260 13444 A170200B.RSR 3.9 170 63 20:04:00 21:00:00 -/XL 1 4 25 16 25260 13444 A170200C.RSR 5.7 170 63 20:04:00 21:00:00 -/SL 0 4 25 16 25260 13444 A170200D.RSR 4.4 170 63 18:28:00 18:49:00 -/XR 4 4 100 16 20260 25220 A170182E.RSR 19.9 170 63 18:28:00 18:49:00 -/SR 3 4 100 16 20260 25220 A170182F.RSR 9.1 170 63 18:28:00 18:49:00 -/XL 1 5 100 16 20260 25220 A170182G.RSR 23.8 170 63 18:28:00 18:49:00 -/SL 0 5 100 16 20260 25220 A170182H.RSR 10.0 170 63 18:49:00 19:10:00 -/XR 4 4 100 16 20260 25220 A170184A.RSR 20.7 170 63 18:49:00 19:10:00 -/SR 3 4 100 16 20260 25220 A170184B.RSR 9.3 170 63 18:49:00 19:10:00 -/XL 1 5 100 16 20260 25220 A170184C.RSR 26.2 170 63 18:49:00 19:10:00 -/SL 0 5 100 16 20260 25220 A170184D.RSR 10.1 170 63 19:10:00 19:31:00 -/XR 4 4 100 16 20260 25220 A170191E.RSR 29.3 170 63 19:10:00 19:31:00 -/SR 3 4 100 16 20260 25220 A170191F.RSR 17.3 170 63 19:10:00 19:31:00 -/XL 1 5 100 16 20260 25220 A170191G.RSR 32.7 170 63 19:10:00 19:31:00 -/SL 0 5 100 16 20260 25220 A170191H.RSR 15.1 170 63 19:31:00 19:51:00 -/XR 4 4 100 16 20260 24020 A170193A.RSR 65.4 170 63 19:31:00 19:51:00 -/SR 3 4 100 16 20260 24020 A170193B.RSR 44.3 170 63 19:31:00 19:51:00 -/XL 1 5 100 16 20260 24020 A170193C.RSR 36.3 170 63 19:31:00 19:51:00 -/SL 0 5 100 16 20260 24020 A170193D.RSR 22.5 170 63 19:51:00 20:04:00 -/XR 4 4 100 16 20260 15620 A170195A.RSR 65.6 170 63 19:51:00 20:04:00 -/SR 3 4 100 16 20260 15620 A170195B.RSR 44.3 170 63 19:51:00 20:04:00 -/XL 1 5 100 16 20260 15620 A170195C.RSR 36.8 170 63 19:51:00 20:04:00 -/SL 0 5 100 16 20260 15620 A170195D.RSR 22.5 The specular point track for these measurements began at the base of Pavonis Mons, moved southwest, and climbed well up the flanks of Arsia Mons before drifting south into cratered terrain. Preliminary calculations put the specular point at (10S, 119W) at 18:53, which would be slightly southeast of Arsia Mons' caldera; but the high-gain antenna footprint was 153x214 km, so part of the caldera may have been illuminated. The quick-look processing does not show whether useful echoes were obtained from the volcanoes, which are known to be particularly poor (specular) reflectors when studied with Earth-based radar. The specular incidence angle at Arsia Mons was 45 degrees. At that angle the RCP echo is expected to be 3 times weaker than the LCP echo; both are required to calculate the power ratio, which is used to estimate dielectric constant. Despite these obstacles, this is one of the more interesting BSR tracks in the 2010 season. Anomalies --------- As was the case for the experiment on day 157, the LCP receiver outputs were captured and recorded using a WVSR receiver rather than the usual RSR, which is still under repair. Real-time monitoring of the WVSR is somewhat different than for the RSR, and the LCP pre-cal data were accidently collected using 8 kHz sampling (rather than 25 kHz) before RSSG support personnel noticed the error. This may have a small impact on the uncertainties associated with pre-cal measurements for X-LCP and S-LCP. Otherwise, use of the WVSR had no impact on experiment quality based on quick-look processing results. Both S-Band LNAs continue to be unstable. S-RCP power varied by about 0.5 dB during the pre-cal with the ambient load connected. Somewhat smaller variations can be seen with the ambient load connected during the post-cal. Because of the instability, it may not be possible to calibrate the noise diode from the post-cal ambient load data (with and without the noise diode). Other configurations are usually preferred, but the ambient load configuration provides a cross-check on receiver linearity. S-RCP gain also appeared to vary by up to 0.2 dB during the surface observations on time scales of 10 minutes; this will introduce about a +/-2.5 percent error in the S-RCP echo power estimate. Instabilities in the S-LCP LNA are more confined in time but larger in magnitude. At 19:15 the S-LCP noise power suddenly increased by about 0.2 dB over about one minute in time. The noise power appeared to remain at the new level for the remainder of the observations ... except that starting at 19:27 the noise power began to decrease. The rate accelerated until about 2.5 dB in noise power had been lost at 19:31:30. Over the next minute, the noise power returned to its previous (e.g., 19:26) level. Similar 2.5 dB dropouts over 5-6 minutes have been noted during the bistatic radar experiments on days 106, 135, and 142 (all on S-LCP at DSS 63).