\header ENTRY_TIME = 2007 MAR 08 21:50:32 SYSTEM_NAME = RS AUTHOR = SIMPSON, RICHARD INSTITUTION = STANFORD UNIVERSITY START_TIME = 2001 SEP 19 00:00:00 STOP_TIME = 2001 SEP 19 23:59:59 TARGET = MARS ORBIT = NULL \text From aseel@godzilla.jpl.nasa.gov Mon Sep 17 13:40 PDT 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id NAA16331 for ; Mon, 17 Sep 2001 13:40:17 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id NAA16151; Mon, 17 Sep 2001 13:40:33 -0700 (PDT) Message-Id: <200109172040.NAA16151@godzilla.jpl.nasa.gov> Date: Mon, 17 Sep 2001 13:40:33 -0700 (PDT) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: Re: RSR/DSP Data To: rsimpson@magellan.stanford.edu Cc: joe@nova.stanford.edu MIME-Version: 1.0 Content-MD5: q4vAM1NTAT3AbbTzTHPHBg== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 1031 Status: R We're set for Wednesday. I'm thinking of running two RSRs: one using DSN generated predicts, and the other RS generated predicts (if I'm able to generate them correctly). ------------- Begin Forwarded Message ------------- Date: Mon, 17 Sep 2001 13:13:22 -0700 To: DL-DSNSCHED@jjpl.jpl.nasa.gov From: Karen Yetter Subject: R/T Change - MGS Please make the following configuration code change for MGS in the R/T week 38. This request adds the DSP-R and FSR-R to the existing equipment string. R/T WEEK 38 ----------- C1 262 2140 2240 0220 0235 DSS-14 MGS TKG PASS 1781 V00H 1A1 C2 V50H Thank you, Karen _______________________________________ Karen Yetter Jet Propulsion Laboratory Multi-mission DSN Allocation and Planning (MDAPT) Team MGS/SDU/PLNB/DS1/CAS/M01O/GNS Phone:(818) 393-7966 FAX:(818) 393-3147 Pager:(800) 759-8888 Pin # 1413089 _______________________________________ ------------- End Forwarded Message ------------- -------------------------------------------------------------------------- From aseel@godzilla.jpl.nasa.gov Wed Sep 19 18:57 PDT 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id SAA23511 for ; Wed, 19 Sep 2001 18:57:24 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id SAA26786; Wed, 19 Sep 2001 18:57:42 -0700 (PDT) Message-Id: <200109200157.SAA26786@godzilla.jpl.nasa.gov> Date: Wed, 19 Sep 2001 18:57:42 -0700 (PDT) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: Re: RSR Data To: rsimpson@magellan.stanford.edu, joe@neptune.stanford.edu Cc: hinson@nimbus.stanford.edu, len@nova.stanford.edu, sami.asmar@jpl.nasa.gov MIME-Version: 1.0 Content-MD5: 4wq6LYgWcvKoCOJDqF2POw== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 1409 Status: RO Hello, I collected 1-way DSP and RSR data in parallel for about an hour. This was done over DSS-14 today (DOY 262, BOT 3:40 p.m. PDT). I ran two RSRs: one using DSN generated predicts, and the other using Radio Science generated predicts. I recorded on four channels per RSR using the following bandwidths: 1k, 2k, 4k, and 8k Hz. This adds up to 8 RSR data files. The RSR and DSP data times are 01-262/23:35:00 to 01-263/00:40:00. I transferred the RSR data to /users/m9/data/aseel on magellan. The files names are 01.262.14.2335-0040.XY.rsr where: X = 1, 2, 4 or 8 for 1k, 2k, 4k and 8k Hz bandwidths, respectively. Y = d or r for DSN and Radio Science predicts, respectively. The DSP data are on the CDR and ready to be queried. Regards, Aseel > Aseel: > > Joe would like to calculate Allan Deviation using a reasonably long > stretch of RSR data. This would be most valuable if there were DSP > data collected in parallel for comparison. The bistatic radar data > are one option, but the SNR was so low (direct signal via HGA sidelobe) > that the results may not be very meaningful in terms of occultation > standards. > > Would it be possible to find a time when MGS is in one-way mode and > collect both RSR and DSP data for 10-30 minutes? This is not urgent > except that Joe is starting to get excited about what can be done with > the RSR. > > Thanks, > Dick -------------------------------------------------------------------------- From aseel@godzilla.jpl.nasa.gov Thu Sep 27 16:13 PDT 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id QAA21713 for ; Thu, 27 Sep 2001 16:13:51 -0700 (PD T) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id QAA10321; Thu, 27 Sep 2001 16:14:20 -0700 (PDT) Message-Id: <200109272314.QAA10321@godzilla.jpl.nasa.gov> Date: Thu, 27 Sep 2001 16:14:20 -0700 (PDT) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: Re: RSR Tests Data To: rsimpson@magellan.stanford.edu, joe@neptune.stanford.edu MIME-Version: 1.0 Content-MD5: n6BCDElxtXIKKJus++jqCg== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 712 Hello Dick, It wasn't a miscommunication. I knew that we needed 16-bit samples. That's what I've used before. I remember setting the configuration to 16-bits, but I also remember that I had a problem loading the predicts so I disconnected and reconnected to the RSR. The default configuration is 8-bit, so I fear that I may have forgotten to reset it to 16-bits. I'm terribly sorry. I will reschedule a pass to collect the data again. I hope that you didn't already spend much time looking at the data. -Aseel > Aseel: > > All of the data collected on day 262 appear to have been > collected with 8-bit samples. We were expecting 16 bits. > Was there a miscommunication here? > > Dick \header ENTRY_TIME = 2007 MAR 08 21:50:32 SYSTEM_NAME = RS AUTHOR = SIMPSON, RICHARD INSTITUTION = STANFORD UNIVERSITY START_TIME = 2001 OCT 03 00:00:00 STOP_TIME = 2001 OCT 03 23:59:59 TARGET = MARS ORBIT = NULL \text From esax@jftl.jpl.nasa.gov Tue Oct 2 13:13 PDT 2001 Received: from jftl-mm.jpl.nasa.gov (jftl.jpl.nasa.gov [128.149.117.25]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id NAA15612 for ; Tue, 2 Oct 2001 13:13:06 -0700 (PDT) Received: from jftl.jpl.nasa.gov ([128.149.117.23]) by jftl-mm.jpl.nasa.gov with MailMarshal (3,3,0,0) id ; Tue, 02 Oct 2001 13:13:45 -700 Received: by jftl-mm.jpl.nasa.gov with Internet Mail Service (5.5.2653.19) id ; Tue, 2 Oct 2001 13:13:44 -0700 Message-ID: From: "Sax, Eugene L" To: DSN-Official , CDSCC-Operations , DSN-OPS-CHIEFS , DSN-STAOPS , DSN-COMM-CHIEFS Cc: "'rsimpson@magellan.Stanford.edu'" , "Brower, Eugene E" , "Hwang, Pauline P" , "Thorpe, Thomas E" , "'aseel@godzilla.jpl.nasa.gov'" , "'Adams, William R'" , DSN-MPSETB , "GDSCC Operations," , MDSCC-Operations , "'Lewis, Jeff A'" , "'Shafter, David H'" , "'Toro-Allen, Scott L'" , "'Neuman, James C'" , "'Spath, Stuart R'" , "'Spencer, David A (X-JPL)'" , "DSN.930-OPS" , "Abbate, Salvatore F" , 'dean.s.espitallier@lmco.com', "Medina, Margaret" , "Torres, Ricardo G" , "Esposito, Pasquale B" , "'Martin, Kyle W'" Subject: BM: MGS DKF TIMING PROBLEM FOR ROTO'S FOR DOY 276 ONLY Date: Tue, 2 Oct 2001 13:13:42 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Content-Length: 1787 Status: RO ROUTING JGTS / ANBE / LRID / JOCC / JFTL / JJPL / JMAR FROM MPSETB / E SAX SUBJECT: Briefing Message for Mars Global Surveyor. (MGS) There is a timing problem with the latest DKF/SOE that was sent. SCHEDULE: The following station is scheduled to support MGS on the date and times noted: 276 DSS-45 0050Z-1505Z INFORMATION: We have a timing error in our ROTO spec advisories in the current dkf. So for tomorrows ROTO'S the following messages in the station soe appear as an incorrect time: 276 105702 TRK D45 SPEC ADVISORY [ROTO HAS BEEN PREDICTED TO START AT THIS TIME, LOS IS EXPECTED] 276 105702 TRK D45 SPEC ADVISORY [CONSCAN OFF] and 276 111832 TRK D45 SPEC ADVISORY [ROTO HAS BEEN PREDICTED TO END AT THIS TIME, AOS IS EXPECTED] 276 111832 TRK D45 SPEC ADVISORY [RESUME BVR ACQUISITION] 276 111832 TRK D45 SPEC ADVISORY [CONSCAN ON FOLLOWING AOS] Actual expected time for the ROTO LOS is: 11:11:54 (not 10:57:02) Actual expected time for the ROTO AOS is: 11:34:00 (not 11:18:32) Note that these expected times are approximate and can be off by up to 30 seconds. Sorry for the error. Timing for future ROTOs will be more accurate. DATA RECORDS: LMC Logs will be available on the NIS for post pass analysis. Your continued excellent support is greatly appreciated. MPSET-B POINTS OF CONTACT: Alan Short Office (626) 584-4447 Cell Phone (626)483-5547 Gene Sax Office (626) 584-4467 Pager (800) 759-8888 PIN: 1768992 Anthony Knight Office (626) 584-4445 Pager (800) 759-8888 PIN: 1648426 Byron Walker Office (626) 584 4430 Pager (626) 932-4768 Eugene Sax Deputy Network Operations Project Engineer Honeywell Technology Solutions Inc. Pasadena, Ca. 91107 esax@jftl.jpl.nasa.gov 626-584-4467 \header ENTRY_TIME = 2007 MAR 08 21:50:33 SYSTEM_NAME = RS AUTHOR = SIMPSON, RICHARD INSTITUTION = STANFORD UNIVERSITY START_TIME = 2001 OCT 11 00:00:00 STOP_TIME = 2001 OCT 11 23:59:59 TARGET = MARS ORBIT = NULL \text From aseel@godzilla.jpl.nasa.gov Thu Oct 11 14:11 PDT 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id OAA13145 for ; Thu, 11 Oct 2001 14:11:24 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id OAA09222; Thu, 11 Oct 2001 14:12:10 -0700 (PDT) Message-Id: <200110112112.OAA09222@godzilla.jpl.nasa.gov> Date: Thu, 11 Oct 2001 14:12:10 -0700 (PDT) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: RSR/DSP Data To: joe@neptune.stanford.edu Cc: rsimpson@magellan.stanford.edu MIME-Version: 1.0 Content-MD5: PKLfirJn4vpITP5OofcwmQ== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 1308 Status: RO Hello Joe, I collected RSR and DSP data over DSS 63 today. The recording started at 284/19:30:00 and ended at 283/20:35:00. The DSP recording went well. The data is ready to be queried. I recorded 8 RSR data sets per Dick's request: 1, 2, 4, and 8 kHz on one RSR with 16-bit samples; and 1, 2, 4, and 8 kHz on a second with 8-bit samples. All using RS predicts. 27 minutes into the recording I started getting some warning messages which I'm not sure if and how they'll have any affect on the data. If I did try to fix it, that would've put a phase shift in the data, so I decided to continue with the recording. It would actually be interesting to know whether you see anything in the data or not. I have the exact times of the warnings. They are: 16-bit data: 19:58:18 19:59:38 20:16:54 20:18:14 20:18:54 20:19:33 20:20:13 20:20:53 20:21:33 20:22:13 20:22:53 8-bit data: 19:57:27 19:58:07 19:58:47 19:59:27 20:00:06 20:01:26 20:10:04 20:12:04 20:13:23 20:14:03 20:16:03 20:16:42 20:18:02 20:18:42 20:19:22 20:20:02 20:20:42 20:21:21 20:22:01 20:22:41 There's another opportunity to collect 30 minutes of 1-way data coming up in 15 minutes. I'll collect that data just in case. Please let me know where I should put the RSR data on magellan. The usual place? Thanks, Aseel -------------------------------------------------------------------------- From joe@neptune.stanford.edu Thu Oct 18 16:37 PDT 2001 Received: from neptune.Stanford.EDU (neptune [171.64.90.149]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id QAA24296 for ; Thu, 18 Oct 2001 16:37:26 -0700 (PDT) Received: (from joe@localhost) by neptune.Stanford.EDU (8.9.3/8.9.3) id QAA02132 for rsimpson@magellan.stanford.edu; Thu, 18 Oct 2001 16:34:21 -0700 (PDT) Message-ID: X-Mailer: XFMail 1.2 [p0] on Solaris X-Priority: 3 (Normal) Content-Transfer-Encoding: 8bit MIME-Version: 1.0 Date: Thu, 18 Oct 2001 16:34:21 -0700 (PDT) Sender: joe@neptune.stanford.edu From: Joe Twicken To: rsimpson@magellan.stanford.edu Subject: RSR/ODR Comparison II Content-Type: text/plain; charset=us-ascii Content-Length: 2741 Status: RO Dick- I have processed the ODR and 8 RSR's recorded from 2001/284-19:30:00 to 2001/284-20:35:00 at DSS 63, and calculated the Allan deviation from each recording. The ODR was recorded at 5 kHz with 12 bits/sample (real only). The RSR's were recorded at 1, 2, 4 and 8 kHz with 8 bit I/8 bit Q (complex) and with 16 bit I/16 bit Q. The results between RSR and ODR are comparable at all sample rates and with both RSR sample resolutions. The SNR during the recording interval was approximately 47 dB/Hz. It would still be nice to compare the performance of 8 and 16 bit RSR sampling with spacecraft telemetry off (and substantially higher signal level). The Allan deviation calculations for ODR and RSR's are included below. You may also find a postscript file with comparison between 5 kHz (real) ODR and 2 kHz (complex) 8-bit RSR in magellan:/users/z00/USO/adcomp2.ps. Joe ***************************************************************************** Allan Deviation. DSP, 12 bits/sample, real only T, sec 5 kHz 0.4096 1.0256e-12 0.8192 4.8234e-13 1.6384 3.4666e-13 3.2768 3.4283e-13 6.5536 3.7756e-13 26.2144 4.0055e-13 104.8576 2.9024e-13 Allan Deviation. RSR, 8-bit I/8-bit Q T, sec 1 kHz 2 kHz 4 kHz 8 kHz 0.5120 7.5964e-13 7.5635e-13 7.5800e-13 7.5955e-13 1.0240 4.0245e-13 4.0353e-13 4.0775e-13 4.1197e-13 2.0480 3.3940e-13 3.3839e-13 3.3825e-13 3.3757e-13 4.0960 3.4928e-13 3.4876e-13 3.4833e-13 3.4824e-13 8.1920 3.9198e-13 3.9450e-13 3.9529e-13 3.9568e-13 32.7680 3.1972e-13 3.1991e-13 3.2003e-13 3.2007e-13 131.0720 3.4875e-13 3.4971e-13 3.5020e-13 3.5044e-13 Allan Deviation. RSR, 16-bit I/16-bit Q T, sec 1 kHz 2 kHz 4 kHz 8 kHz 0.5120 7.6003e-13 7.5700e-13 7.5828e-13 7.6013e-13 1.0240 4.0244e-13 4.0347e-13 4.0775e-13 4.1189e-13 2.0480 3.3930e-13 3.3821e-13 3.3811e-13 3.3746e-13 4.0960 3.4925e-13 3.4872e-13 3.4829e-13 3.4816e-13 8.1920 3.9193e-13 3.9447e-13 3.9524e-13 3.9562e-13 32.7680 3.1971e-13 3.1991e-13 3.2003e-13 3.2006e-13 131.0720 3.4876e-13 3.4973e-13 3.5021e-13 3.5046e-13 \header ENTRY_TIME = 2007 MAR 08 21:50:33 SYSTEM_NAME = RS AUTHOR = SIMPSON, RICHARD INSTITUTION = STANFORD UNIVERSITY START_TIME = 2001 OCT 19 00:00:00 STOP_TIME = 2001 OCT 19 23:59:59 TARGET = MARS ORBIT = NULL \text From aseel@godzilla.jpl.nasa.gov Mon Oct 22 16:01 PDT 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id QAA26711; Mon, 22 Oct 2001 16:01:32 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id QAA21412; Mon, 22 Oct 2001 16:02:31 -0700 (PDT) Message-Id: <200110222302.QAA21412@godzilla.jpl.nasa.gov> Date: Mon, 22 Oct 2001 16:02:31 -0700 (PDT) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: Re: MGS RST Rpt HEA1295A.TXT To: rsimpson@magellan.stanford.edu Cc: data@magellan.stanford.edu, hinson@nimbus.stanford.edu, joe@neptune.stanford.edu, sami.asmar@jpl.nasa.gov, jglance@mail1.jpl.nasa.gov MIME-Version: 1.0 Content-MD5: 2L1DvLyF7jqpD3gQoFazzw== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 4316 Status: RO Dick, I thought you were on Gene Brower's distribution list, so I didn't forward the messages to you. Sorry! Below are Gene's emails since Friday. -Aseel ------------- Begin Forwarded Message ------------- Date: Fri, 19 Oct 2001 07:27:43 -0700 To: MGS Dist:; From: Gene Brower Subject: MGS in C-Mode FYI: MGS is currently in C-Mode. The preliminary cause seems to be a Starex convergence problem but due to the lack of telemetry the actual root cause is still under investigation. Stay tuned. Thanks -Gene OFFICE: (818)393-0943 CELL: (818)645-5943 ------------- End Forwarded Message ------------- ------------- Begin Forwarded Message ------------- Date: Fri, 19 Oct 2001 09:57:23 -0700 To: MGS Dist:; From: Gene Brower Subject: MGS Status (C-mode) ALL: To keep everyone informed, the current plan for MGS recovery is to attempt to have MGS recovered by Monday, October 22. Currently Telemetry data is sparse due to Sun Coning and the intermittent 10 bps downlink. This first steps will be to stop the Sun coning at a point were continuos telemetry lock can be obtain. Next MRO's will be requested to determine the cause of the C-mode entry. At this point a meeting will be called so the health and safety of MGS can be address prior to taking the next steps in the recovery process. Currently no time is set for this initial meeting. Thank You, Gene Brower ------------- End Forwarded Message ------------- ------------- Begin Forwarded Message ------------- Date: Sun, 21 Oct 2001 21:29:00 -0700 To: MGS Dist:; From: Gene Brower Subject: MGS Recovered The MGS Spacecraft has recovered from the latest Contingency mode entry. MGS will be in the Relay16 Mapping configuration with a nominal Back-Ground Sequence executing at approximately 01-295/0515z (Sunday 10:15 PM Pacific). All Spacecraft Subsystems are operating within expected states. The MGS spacecraft entered contingency mode 2001-292T04:52:18z. Symptoms of spacecraft slowly drifting off point could be seen in the degradation of the downlink AGC after the spacecraft return from a ROTO observation at approximately 292/00:40z. No unusual spacecraft activity (sequences) or uplinks were taking place at the time of entry. Based on the latest available data, this contingency mode entry is similar to the contingency mode entry of September 6, 2001. On September 6 an uncataloged celestial body seemed to interfered with STAREX processing following a ROTO. If STAREX misidentifies a star during the period the attitude covariances are widened to aid the bias convergence process following a ROTO, the gyro biases may get corrupted leading to difficulties in determining attitude knowledge and subsequent contingency mode entry. Upon Contingency mode entry the spacecraft enters sun coning with Low Gain Antenna at a 10bps downlink telemetry rate after each occultation. Contingency mode recovery process began Friday morning October 19 once the downlink signal from MGS were acquired and Contingency mode sun coning was confirmed. Inertial reference was reestablished by the end of the day Friday which confirm no long term anomalies with STAREX. MGS then established NADIR point and resumed nominal HGA tracking at approximately at 294/00:22z (Saturday October 20 at 5:22 PM Pacific) The TES and MOC science instruments were Power on Sunday afternoon October 21. A nominal Back-Ground Sequence was set to begin executing at approximately 01-295/0500z (Sunday 10:00 PM Pacific) The MOLA instrument will be turned on as part of the Back-Ground Sequence Monday night and MAG/ER instruments will be powered on sometime next week following the Mars Odyssey MOI activities. Thank You, Gene Brower ------------- End Forwarded Message ------------- > > MGS went into C-mode on Friday. When I asked they thought > it was related to a ROTO activity. > > > At 03:35 PM 10/22/2001 -0700, Dick Simpson 723-3525 wrote: > > > >According to Data Control, MGS is just coming out of contingency mode -- > >hence our 0.5 MB of spacecraft engineering data from day 293 (as opposed > >to about 25 MB normally). Anyone know anything about this? > > -------------------------------------------------------------------------- From flemoine@geodesy2.gsfc.nasa.gov Tue Oct 23 15:57 PDT 2001 Received: from geodesy2.gsfc.nasa.gov (geodesy2.gsfc.nasa.gov [128.183.107.54]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id PAA14206 for ; Tue, 23 Oct 2001 15:57:18 -0700 (PDT) Received: (from flemoine@localhost) by geodesy2.gsfc.nasa.gov (8.9.3/8.9.3) id WAA16290 for rsimpson@magellan.stanford.edu; Tue, 23 Oct 2001 22:58:18 GMT From: Frank Lemoine Message-Id: <200110232258.WAA16290@geodesy2.gsfc.nasa.gov> Subject: [Fwd: MGS Recovered] (forwarded) To: rsimpson@magellan.stanford.edu Date: Tue, 23 Oct 2001 22:58:18 GMT X-Mailer: Elm [revision: 212.4] Content-Type: text Content-Length: 2874 Status: RO > > Mime-Version: 1.0 > X-Sender: ebrower@pop.jpl.nasa.gov > Message-Id: > Date: Sun, 21 Oct 2001 21:29:00 -0700 > To: MGS Dist:; > From: Gene Brower > Subject: MGS Recovered > Cc: David.A.Spencer@jpl.nasa.gov, Chris.P.Jones@jpl.nasa.gov, > Matthew.R.Landano@jpl.nasa.gov > Content-Type: text/plain; charset="us-ascii" ; format="flowed" > X-Mozilla-Status2: 00000000 > > > The MGS Spacecraft has recovered from the latest Contingency mode entry. > > MGS will be in the Relay16 Mapping configuration with a nominal > Back-Ground Sequence executing at approximately 01-295/0515z (Sunday > 10:15 PM Pacific). All Spacecraft Subsystems are operating within > expected states. > > The MGS spacecraft entered contingency mode 2001-292T04:52:18z. > Symptoms of spacecraft slowly drifting off point could be seen in the > degradation of the downlink AGC after the spacecraft return from a > ROTO observation at approximately 292/00:40z. No unusual spacecraft > activity (sequences) or uplinks were taking place at the time of > entry. > > Based on the latest available data, this contingency mode entry is > similar to the contingency mode entry of September 6, 2001. On > September 6 an uncataloged celestial body seemed to interfered with > STAREX processing following a ROTO. If STAREX misidentifies a star > during the period the attitude covariances are widened to aid the > bias convergence process following a ROTO, the gyro biases may get > corrupted leading to difficulties in determining attitude knowledge > and subsequent contingency mode entry. > > Upon Contingency mode entry the spacecraft enters sun coning with Low > Gain Antenna at a 10bps downlink telemetry rate after each > occultation. Contingency mode recovery process began Friday morning > October 19 once the downlink signal from MGS were acquired and > Contingency mode sun coning was confirmed. Inertial reference was > reestablished by the end of the day Friday which confirm no long term > anomalies with STAREX. MGS then established NADIR point and resumed > nominal HGA tracking at approximately at 294/00:22z (Saturday October > 20 at 5:22 PM Pacific) The TES and MOC science instruments were Power > on Sunday afternoon October 21. A nominal Back-Ground Sequence was > set to begin executing at approximately 01-295/0500z (Sunday 10:00 PM > Pacific) The MOLA instrument will be turned on as part of the > Back-Ground Sequence Monday night and MAG/ER instruments will be > powered on sometime next week following the Mars Odyssey MOI > activities. > > > Thank You, > > Gene Brower > Mars Global Surveyor Mission Manager > Genesis PCAT lead (acting-additional duty) > M/S: 264-235, Office: 264-212 > Phone: OFFICE: (818)393-0943 > CELL: (818)645-5943 > \header ENTRY_TIME = 2007 MAR 08 21:50:33 SYSTEM_NAME = RS AUTHOR = SIMPSON, RICHARD INSTITUTION = STANFORD UNIVERSITY START_TIME = 2001 OCT 31 00:00:00 STOP_TIME = 2001 OCT 31 23:59:59 TARGET = MARS ORBIT = NULL \text From flemoine@geodesy2.gsfc.nasa.gov Wed Oct 31 14:17 PST 2001 Received: from geodesy2.gsfc.nasa.gov (geodesy2.gsfc.nasa.gov [128.183.107.54]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id OAA13475 for ; Wed, 31 Oct 2001 14:17:37 -0800 (PST) Received: (from flemoine@localhost) by geodesy2.gsfc.nasa.gov (8.9.3/8.9.3) id WAA25671 for rsimpson@magellan.stanford.edu; Wed, 31 Oct 2001 22:18:47 GMT From: Frank Lemoine Message-Id: <200110312218.WAA25671@geodesy2.gsfc.nasa.gov> Subject: snake(s) in the building (fwd) To: rsimpson@magellan.stanford.edu Date: Wed, 31 Oct 2001 22:18:47 GMT X-Mailer: Elm [revision: 212.4] Content-Type: text Content-Length: 823 Status: RO Apparently life at GSFC is hazardous not just because we might receive anthrax-laced mail. -FGL > > > > > 10-31-01 > > Howdy, > > We now have a report of another small snake in building 33"A" wing on the > first floor. > > The first snake of several weeks ago, seen in the Women's restroom and > later captured there, was identified by Code 205 as being a copperhead. A > coperhead is one of four venomous snakes in North America. The potency of > the venom is not dependent on the size of the snake. > > The most recently reported critter has the same description. If you see a > snake in the building please notify Security right away to facilitate safe > capture and removal. The telephone number of Security Dispatch is 6-8661. > > > > Merritt W. Pharo III > ESSB 33, Facility Operations Manager > > \header ENTRY_TIME = 2007 MAR 08 21:50:33 SYSTEM_NAME = RS AUTHOR = SIMPSON, RICHARD INSTITUTION = STANFORD UNIVERSITY START_TIME = 2001 NOV 15 00:00:00 STOP_TIME = 2001 NOV 15 23:59:59 TARGET = MARS ORBIT = NULL \text From aseel@godzilla.jpl.nasa.gov Fri Nov 2 16:57 PST 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id QAA02277 for ; Fri, 2 Nov 2001 16:57:41 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id QAA23794; Fri, 2 Nov 2001 16:58:53 -0800 (PST) Message-Id: <200111030058.QAA23794@godzilla.jpl.nasa.gov> Date: Fri, 2 Nov 2001 16:58:53 -0800 (PST) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: More Test Data Approved To: joe@nova.stanford.edu, rsimpson@magellan.stanford.edu MIME-Version: 1.0 Content-MD5: 5UjEFArZEHN0GyqLb8jJBw== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 524 Hello, Our request to collect half an hour of RSR test data with telemetry off was approved. This will occur on DOY 319 (11/15) over DSS-65. Telemetry will be turned off between 1700 and 1730 SCET. The SOE is not out yet. Will we be using the same configurations that we used last time, i.e., RS predicts only, 8-bits on one RSR, 16-bits on the other, both with 1, 2, 4, and 8 kHz bandwidths? The other rack (2 RSRs) is available so we can do as many as 8 additional combinations if you'd like. Regards, Aseel -------------------------------------------------------------------------- From rsimpson Fri Nov 2 17:01 PST 2001 Received: (from rsimpson@localhost) by magellan.stanford.edu (8.9.3/8.9.3) id RAA02366; Fri, 2 Nov 2001 17:01:14 -0800 (PST) Date: Fri, 2 Nov 2001 17:01:14 -0800 (PST) From: Dick Simpson 723-3525 Message-Id: <200111030101.RAA02366@magellan.stanford.edu> To: aseel@godzilla.jpl.nasa.gov, joe@nova.stanford.edu, rsimpson@magellan.stanford.edu Subject: Re: More Test Data Approved Content-Type: text Content-Length: 543 >Will we be using the same configurations that we used last time, i.e., >RS predicts only, 8-bits on one RSR, 16-bits on the other, both with 1, >2, 4, and 8 kHz bandwidths? The other rack (2 RSRs) is available so >we can do as many as 8 additional combinations if you'd like. I would just repeat the previous test. But, if Joe has other ideas, please listen to him. I'm leaving for some family business early on Nov 6 and won't be back until late on Nov 12 (and may only be available for partial days during the week following). -------------------------------------------------------------------------- From aseel@godzilla.jpl.nasa.gov Thu Nov 15 12:18 PST 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id MAA08462 for ; Thu, 15 Nov 2001 12:18:15 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id MAA20045; Thu, 15 Nov 2001 12:19:45 -0800 (PST) Message-Id: <200111152019.MAA20045@godzilla.jpl.nasa.gov> Date: Thu, 15 Nov 2001 12:19:45 -0800 (PST) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: Test Data To: rsimpson@magellan.stanford.edu, joe@neptune.stanford.edu MIME-Version: 1.0 Content-MD5: ZFNvrNuhcsUbmggnUl5g5A== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 556 Status: RO Hello, The test is over and I'm getting ready to query the RSR data. Telemetry was off at 319/17:39:45, but I used the first couple of minutes to change attenuation values on both the RSR and DSP. The last attenuation change on the RSR was at 17:41:05, and the last one on the DSP was at 17:42:11. I assume you'd want me to start the RSR query after the last change, so I'll start it at 17:41:10, OK with you? The DSP data is on the CDR and ready to be queried. Telemetry was back on at 18:09:45, but I recorded until 18:11:00. Regards, Aseel -------------------------------------------------------------------------- From aseel@godzilla.jpl.nasa.gov Thu Nov 15 16:45 PST 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id QAA23813 for ; Thu, 15 Nov 2001 16:45:35 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id QAA21419 for ; Thu, 15 Nov 2001 16:47:06 -0800 (PST) Message-Id: <200111160047.QAA21419@godzilla.jpl.nasa.gov> Date: Thu, 15 Nov 2001 16:47:06 -0800 (PST) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: Re: Test Data To: rsimpson@magellan.stanford.edu MIME-Version: 1.0 Content-MD5: 2aJCiE7U8YgyQ8XRocRuxA== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 350 Status: RO > I could look this up; but do you have the station ID and > the SOE handy for this test? I'm guessing DSS 65, but I'm > completely out of touch with the SOE stream. I apologize I was planning on sending a complete report about the test, but I got busy trying to test the RSR data query for MGS. Yes, it's DSS-65. SOE is mm155a.05.tsoe. -------------------------------------------------------------------------- From aseel@godzilla.jpl.nasa.gov Thu Nov 15 18:19 PST 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id SAA24306 for ; Thu, 15 Nov 2001 18:19:48 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id SAA22009; Thu, 15 Nov 2001 18:21:17 -0800 (PST) Message-Id: <200111160221.SAA22009@godzilla.jpl.nasa.gov> Date: Thu, 15 Nov 2001 18:21:17 -0800 (PST) From: Aseel Anabtawi Reply-To: Aseel Anabtawi Subject: MGS RS RSR/DSP Test To: len@nova.stanford.edu, hinson@nimbus.stanford.edu, rsimpson@magellan.stanford.edu, joe@nova.stanford.edu, thomas.e.thorpe@jpl.nasa.gov, ebrower@mail1.jpl.nasa.gov, walter.j.glance@jpl.nasa.gov, Pauline.P.Hwang@jpl.nasa.gov, reid.c.thomas@jpl.nasa.gov, william.r.adams@lmco.com, stephen.c.odiorne@lmco.com, Peter.T.Poon@jpl.nasa.gov, esax@jftl.jpl.nasa.gov Cc: Sami.W.Asmar@jpl.nasa.gov MIME-Version: 1.0 Content-MD5: maupcwV2VwXGBvBKTJE9KQ== X-Mailer: dtmail 1.2.1 CDE Version 1.2.1 SunOS 5.6 sun4u sparc Content-Type: TEXT/plain; charset=us-ascii Content-Length: 809 Status: RO Hello, Our RSR/DSP test with telemetry off this morning went well. The purpose of this test was to compare the performance and data quality of the RSR and DSP under the normal MGS spacecraft occultation configuration. The test occurred over DSS-65 and lasted for 30 minutes. Telemetry was turned off between 319/17:39:45 and 319/18:09:45 ERT-UTC. Both RSR and DSP data were collected without any problems, and all data files were transferred to Stanford. This was also an opportunity to test MGS RSR data playback and query. Currently, playing back RSR data blocks that are 8 Kbytes and larger break the CDR (Central Data Record), so 2 Kb and 4 Kb data blocks were played back today. Both the data playback and query worked OK. Thanks to all who helped make this test possible. Regards, Aseel