PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM DATA_SET_ID = "MEX-M-MRS-1/2/3-NEV-0008-V1.0" STANDARD_DATA_PRODUCT_ID = ENB PRODUCER_ID = "SUE" PRODUCT_ID = "M00SUE0L1A_ENB_031920741_00.TXT" PRODUCT_CREATION_TIME = 2006-02-16T11:53:25.000 INSTRUMENT_HOST_ID = "MEX" OBJECT = TEXT PUBLICATION_DATE = 2005-02-13 NOTE = "MEX SUE Experimenter Notes" END_OBJECT = TEXT END From rsimpson@magellan.stanford.edu Tue Aug 12 13:33:17 2003 Received: (from rsimpson@localhost) by magellan.stanford.edu (8.11.6/8.11.6) id h7CKXEI02977; Tue, 12 Aug 2003 13:33:14 -0700 (PDT) Date: Tue, 12 Aug 2003 13:33:14 -0700 (PDT) From: Dick Simpson 723-3525 Message-Id: <200308122033.h7CKXEI02977@magellan.stanford.edu> To: aseel@godzilla.jpl.nasa.gov, hinson@rocc.stanford.edu, joe@neptune.stanford.edu, len@nova.stanford.edu, paetzold.martin@web.de, rsimpson@magellan.stanford.edu, sami.asmar@jpl.nasa.gov Subject: MEX RSR Data from Day 192 Content-Length: 2528 Status: RO Martin: I have processed the three files of RSR data delivered by Sami on CD when you were here at Stanford. The first two files cover the test period and are S-band RCP data; there was an operations anomaly that caused the S-band RSR to stop near the middle, otherwise this would have been one continuous file. The third file contains the X-RCP data. Both S-band files have stable signal levels. The values plotted are average power values in the raw output samples, where the averaging interval is 1 second. The average over the 90 minutes in the first file and the 3 hrs in the second wanders by less than 0.1 dB. The standard deviation is probably less than 0.02 dB, but this is only a guess made by visual inspection. The SNR runs >63 dB throughout. There are a number of spurs in the power spectrum, but we have seen these frequently with MGS when SNR exceeds 60. The historgram looks conservative, so the spurs probably arise from non-linearities in the system before the analog-to-digital converters. The reported X-band SNR is >60 dB, but I think this should be checked (as should the S-band value). WE were seeing much higher values during the tests on day 187 in real time. There are many spurs - at frequencies almost identical to the ones seen in the S-band data. The X-band signal level is less stable than the S-band level; it wanders over about 0.5 dB during the 5 hour recording. There are also a number of level jumps, including one that pushed the A/D converters into saturation (briefly). In the X-band frequency spectra there are artifacts reminiscent of the uplink sweeps we have seen in MGS data at the end of one-way tracking. I believe day 192 was entirely two-way, however, so I'm puzzled by the existence of these sweeps. The activity seems to be concentrated on a time about 3-1/2 hrs into the recording (about 11:10 UTC). I see nothing in these data to indicate that there would be problems deriving occultation profiles. I'll pass the files along to Joe Twicken; perhaps he can derive some more information on the frequency stability. I have also queried for the TRK-2-34 (TNF) data that was collected during the July DSN tests; so we no longer need to worry about losing those. I will transfer them to Stanford shortly. And I'll send you the results of further analysis here. If you have a way to print Postscript files, I can send the summary plots -- either as a single page with four panels, or as the individual panels in separate PS files. Regards,. Dick - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - From rsimpson@magellan.stanford.edu Fri Aug 15 17:15:58 2003 Date: Fri, 15 Aug 2003 17:15:48 -0700 (PDT) From: Dick Simpson 723-3525 Mime-Version: 1.0 To: paetzold@geo.uni-koeln.deb, joe@neptune.stanford.edu, len@nova.stanford.edu, hinson@rocc.stanford.edu, sami.asmar@jpl.nasa.gov, aseel@godzilla.jpl.nasa.gov, rsimpson@magellan.stanford.edu Subject: Frequencies of RSR Test Data This is a MIME encoded message. Decode it with "munpack" or any other MIME reading software. Mpack/munpack is available via anonymous FTP in ftp.andrew.cmu.edu:pub/mpack/ --- Martin, Sami, et al.: The attached plot (31920741.JPG) shows measured RSR output frequency during the first part of the MEX DSN test on 2003/192. This is the frequency of the two-way S/S open loop carrier with NO correction for receiver tuning, spacecraft or Earth motion, etc. Joe Twicken is working on the software changes needed to include both the two-way and the S-band corrections. The horizontal axis is seconds, with zero set to the beginning of recording. The vertical axis is Hertz. For the processing parameters chosen here a perfectly tuned receiver would have positioned the carrier at 125 Hz. This is a JPEG file. I thought I'd try that rather than our usual Postscript format. If nothing else, the file is at least smaller. I'll send plots for the other three segments we have processed separately. These will be: 31920922.JPG Remainder of two-way S/S data from 2003/192 3192074B.JPG S/X data from 2003/192 32000724.JPG X/X data from 2003/200 Joe is concerned about the occasional dropouts, but is going to attempt a calculation of Allan Deviation from the data in hand. If he is successful, I hope he will distribute results as I will be on vacation next week and largely out of contact. Regards, Dick - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - From jtwicken@stanford.edu Tue Aug 26 23:04:25 2003 Received: from smtp6.Stanford.EDU (smtp6.Stanford.EDU [171.67.16.33]) by magellan.stanford.edu (8.11.6/8.11.6) with ESMTP id h7R64ON00842 for ; Tue, 26 Aug 2003 23:04:24 -0700 (PDT) Received: from neptune.Stanford.EDU (neptune.Stanford.EDU [171.64.90.149]) by smtp6.Stanford.EDU (8.12.9/8.12.9) with ESMTP id h7R64Jhx011945; Tue, 26 Aug 2003 23:04:20 -0700 (PDT) Received: from neptune.Stanford.EDU (joe@localhost) by neptune.Stanford.EDU (8.11.6/8.11.6) with ESMTP id h7R64JV18287; Tue, 26 Aug 2003 23:04:19 -0700 (PDT) Message-Id: <200308270604.h7R64JV18287@neptune.Stanford.EDU> X-Authentication-Warning: neptune.Stanford.EDU: joe owned process doing -bs X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 From: Joe Twicken To: rsimpson@magellan.stanford.edu (Dick Simpson 723-3525), hinson@nova.stanford.edu (Dave Hinson), len.tyler@stanford.edu (len) Subject: MEX 2-way Frequency Stability Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 26 Aug 2003 23:04:19 -0700 Content-Length: 3717 Status: RO Two-way open loop MEX data were acquired at DSS 24 (three recordings) on 2003/192 and DSS 15 (one recording) on 2003/200. I do not yet have a 2-way steering coefficient generator in place, but I did filter/decimate the 2-way data in multiple stages and remove low order (1st or 2nd) polynomial fits to the frequency residuals for the purpose of estimating the 2-way Allan deviation. The results may be found in the four tables below. The frequency scaling in the first two cases was relative to the S-band downlink and in the last two cases was relative to the X-band downlink. Each table also includes a measure of the nominal SNR over the duration of the recording. Due to dropouts in the frequency residuals, the recordings were each truncated in some fashion so as not to bias the frequency stability estimates. ****************************************************************************** Table 1 2003/192 (31920741.RSR): 07:41:00 for 01:09:54 (truncated before dropout) DSS 24: S up/S down Nominal SNR 62 dB/Hz T, sec Allan Deviation 0.256 1.367e-12 0.512 9.594e-13 1.024 7.372e-13 2.048 5.650e-13 4.096 4.586e-13 8.192 4.370e-13 32.768 3.631e-13 131.072 3.155e-13 524.288 2.026e-13 ****************************************************************************** Table 2 2003/192 (31920922.RSR): 09:22:10 for 03:10:03 (truncated before dropout) DSS 24: S up/S down Nominal SNR 63 dB/Hz T, sec Allan Deviation 0.256 1.512e-12 0.512 1.118e-12 1.024 8.807e-13 2.048 6.907e-13 4.096 5.462e-13 8.192 4.471e-13 32.768 2.845e-13 131.072 2.339e-13 524.288 1.852e-13 ****************************************************************************** Table 3 2003/192 (3192074B.RSR): 09:00:00 for 03:31:54 (truncated between dropouts) DSS 24: S up/X down Nominal SNR 60 dB/Hz T, sec Allan Deviation 0.256 1.176e-12 0.512 9.185e-13 1.024 7.085e-13 2.048 5.439e-13 4.096 4.445e-13 8.192 3.575e-13 32.768 2.640e-13 131.072 1.611e-13 524.288 1.025e-13 ****************************************************************************** Table 4 2003/200 (32000724.RSR): 09:30:00 for 02:28:33 (truncated between dropouts) DSS 15: X up/X down Nominal SNR 65 dB/Hz T, sec Allan Deviation 0.256 4.920e-13 0.512 2.717e-13 1.024 2.121e-13 2.048 2.125e-13 4.096 2.130e-13 8.192 1.973e-13 32.768 1.319e-13 131.072 6.694e-14 524.288 6.390e-14 ****************************************************************************** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - From rsimpson@magellan.stanford.edu Sat Aug 30 18:23:23 2003 Date: Sat, 30 Aug 2003 18:23:19 -0700 (PDT) From: Dick Simpson 723-3525 To: hinson@rocc.stanford.edu, joe@neptune.stanford.edu, len@nova.stanford.edu, paetzold@geo.uni-koeln.de, rsimpson@magellan.stanford.edu Subject: MaRS Test Results Martin: Joe Twicken has computed Allan Deviation at several time intervals for the four RSR data files we have received from Sami's group. As Joe notes, he has removed a best fit "t" and "t**2" drift from the data before making the calculations; this should affect the shortest intervals very little. No news from Sami or Aseel regarding additional data. The last I heard, they were planning to send more on Tuesday, but it is now Saturday. I will be at the DPS meeting parts of this next week, but expect to be checking e-mail daily. I contacted Kevin Baines regarding his initiative to secure NASA funding for US Venus Express co-I's; I will try to talk to him further at DPS, but the meeting he is planning is now on Thursday which was not one of my good DPS days. Regards, Dick ... - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - From rsimpson@airmail.fltops.jpl.nasa.gov Thu Oct 2 17:46:49 2003 Received: from airmail1.fltops.jpl.nasa.gov (airmail2.fltops.jpl.nasa.gov [137.228.96.27]) by magellan.stanford.edu (8.11.6/8.11.6) with ESMTP id h930knx08066 for ; Thu, 2 Oct 2003 17:46:49 -0700 (PDT) Received: from rsops2.fltops.jpl.nasa.gov (rsops2.fltops.jpl.nasa.gov [137.228.136.22]) by airmail1.fltops.jpl.nasa.gov (Postfix) with ESMTP id 4EE471092E for ; Thu, 2 Oct 2003 17:46:45 -0700 (PDT) Received: (from rsimpson@localhost) by rsops2.fltops.jpl.nasa.gov (8.11.6+Sun/8.11.6) id h930kjn13724 for rsimpson@magellan.stanford.edu; Fri, 3 Oct 2003 00:46:45 GMT Date: Fri, 3 Oct 2003 00:46:45 GMT From: Richard A Simpson Message-Id: <200310030046.h930kjn13724@rsops2.fltops.jpl.nasa.gov> To: rsimpson@magellan.stanford.edu Subject: MEX NEVT RSR File List Content-Length: 1683 Status: R -rw-r--r-- 1 rssg 8097 81867660 Aug 18 00:13 mex_doy187_dss43_r1a_nx_141830to143200.rsr -rw-r--r-- 1 rssg 8097 2327986860 Aug 26 23:02 mex_doy187_dss43_r1a_nx_154500to220900.rsr -rw-r--r-- 1 rssg 8097 81867660 Aug 19 01:22 mex_doy187_dss43_r1b_ns_141830to143200.rsr -rw-r--r-- 1 rssg 8097 1533938760 Aug 18 23:53 mex_doy187_dss43_r1b_ns_154500to195801.rsr -rw-r--r-- 1 rssg 8097 81867660 Aug 26 22:01 mex_doy187_dss43_r2a_nx_141830to143200.rsr -rw-r--r-- 1 rssg 8097 1627223940 Aug 26 22:39 mex_doy187_dss43_r2a_nx_154500to220900.rsr -rw-r--r-- 1 rssg 8097 81766620 Aug 26 22:31 mex_doy187_dss43_r2b_ns_141831to143200.rsr -rw-r--r-- 1 aseel 8097 260304300 Aug 27 03:03 mex_doy187_dss43_r2b_ns_154500to162756.rsr -rw-r--r-- 1 aseel 8097 1765093020 Aug 27 03:13 mex_doy187_dss43_r2b_ns_162808to211917.rsr -rw-r--r-- 1 rssg 8097 2455297260 Aug 26 23:23 mex_doy191_dss43_r2a_nx_124500to193000.rsr -rw-r--r-- 1 rssg 8097 2128584420 Aug 26 23:39 mex_doy191_dss43_r2b_nx_124500to193000.rsr -rw-r--r-- 1 rssg 8097 147614460 Jul 30 22:51 mex_doy192_dss24_r2b_sx_074110to123900.rsr -rw-r--r-- 1 rssg 8097 49948220 Jul 30 22:46 mex_doy192_dss24_r3b_ss_074100to092146.rsr -rw-r--r-- 1 rssg 8097 97567120 Jul 30 22:34 mex_doy192_dss24_r3b_ss_092209to123900.rsr -rw-r--r-- 1 rssg 8097 15619660 Aug 27 00:08 mex_doy195_dss24_r2b_ss_074400to081530.rsr -rw-r--r-- 1 rssg 8097 196265860 Jul 30 21:40 mex_doy200_dss15_r3a_xx_072400to140000.rsr -rw-r--r-- 1 rssg 8097 183380260 Aug 4 18:42 mex_doy200_dss15_r3b_xs_075000to140000.rsr Radio Science Detailed Gap Report Generated from file /u/mgs/mgsops/auto/MEX/C38EAKT2003_192_0741S24X24D.2B1 Project: MEX Receiver: 2B Receiver subchannel: 1 Uplink DSS: 24 Uplink frequency band: S Downlink DSS: 24 Downlink frequency band: X Tracking mode: 2 Beginning query time: 2003/192-07:41:10 Ending query time: 2003/192-12:39:00 Sequence Number Time Messages ------------------------------------------------------------------------ 3 2003/192-07:41:10 First record 3 2003/192-07:41:10 Dssid change in uplink dss--old DSS was 24; new DSS is 255 17873 2003/192-12:39:00 Last record ------------------------------------------------------------------------ Expected Number of SFDUs: 17871 SFDUs Received: 17871 Sample Rate( Kilo-samples per second ): 2 No time gaps found Radio Science Detailed Gap Report Generated from file /u/mgs/mgsops/auto/MEX/C38EAKT2003_192_0741S24S24D.3B1 Project: MEX Receiver: 3B Receiver subchannel: 1 Uplink DSS: 24 Uplink frequency band: S Downlink DSS: 24 Downlink frequency band: S Tracking mode: 2 Beginning query time: 2003/192-07:41:00 Ending query time: 2003/192-09:21:46 Sequence Number Time Messages ------------------------------------------------------------------------ 31 2003/192-07:41:00 First record 31 2003/192-07:41:00 Dssid change in uplink dss--old DSS was 24; new DSS is 255 6077 2003/192-09:21:46 Last record ------------------------------------------------------------------------ Expected Number of SFDUs: 6047 SFDUs Received: 6047 Sample Rate( Kilo-samples per second ): 2 No time gaps found Radio Science Detailed Gap Report Generated from file /u/mgs/mgsops/auto/MEX/C38EAKT2003_192_0922S24S24D.3B1 Project: MEX Receiver: 3B Receiver subchannel: 1 Uplink DSS: 24 Uplink frequency band: S Downlink DSS: 24 Downlink frequency band: S Tracking mode: 2 Beginning query time: 2003/192-09:22:09 Ending query time: 2003/192-12:39:00 Sequence Number Time Messages ------------------------------------------------------------------------ 6078 2003/192-09:22:09 First record 6078 2003/192-09:22:09 Dssid change in uplink dss--old DSS was 24; new DSS is 255 17889 2003/192-12:39:00 Last record ------------------------------------------------------------------------ Expected Number of SFDUs: 11812 SFDUs Received: 11812 Sample Rate( Kilo-samples per second ): 2 No time gaps found