PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2007-07-31 NOTE = " E-mail and other messages concerning MGS Radio Science on or about 2005/158." END_OBJECT = TEXT END From aseel@airmail.fltops.jpl.nasa.gov Tue Jun 7 11:26:00 2005 Received: from leland2.Stanford.EDU (leland2.Stanford.EDU [171.67.16.93]) by magellan.stanford.edu (8.11.7p1+Sun/8.11.7) with ESMTP id j57IQ0r09301 for ; Tue, 7 Jun 2005 11:26:00 -0700 (PDT) Received: from airmail.fltops.jpl.nasa.gov (airmail2.fltops.jpl.nasa.gov [137.228.96.27]) by leland2.Stanford.EDU (8.12.11/8.12.11) with ESMTP id j57IQ1Uw014916; Tue, 7 Jun 2005 11:26:01 -0700 Received: from rsops2.fltops.jpl.nasa.gov (rsops2.fltops.jpl.nasa.gov [137.228.136.22]) by airmail.fltops.jpl.nasa.gov (Postfix) with ESMTP id 3C10A1091A; Tue, 7 Jun 2005 11:30:49 -0700 (PDT) Received: from rsops2.fltops.jpl.nasa.gov (localhost [127.0.0.1]) by rsops2.fltops.jpl.nasa.gov (8.12.10+Sun/8.12.8) with ESMTP id j57IQ1X0021419; Tue, 7 Jun 2005 18:26:01 GMT Received: (from aseel@localhost) by rsops2.fltops.jpl.nasa.gov (8.12.10+Sun/8.12.8/Submit) id j57IQ06h021418; Tue, 7 Jun 2005 18:26:00 GMT Date: Tue, 7 Jun 2005 18:26:00 GMT From: aseel anabtawi Message-Id: <200506071826.j57IQ06h021418@rsops2.fltops.jpl.nasa.gov> Content-Type: text To: undisclosed-recipients:; DSS: 55 RSR: RSR1A Subchannel: 1 Orbit Number: 27917 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-03:01:00 End Record: 2005/158-03:11:00 DSS: 55 RSR: RSR1A Subchannel: 1 Orbit Number: 27918 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-04:58:00 End Record: 2005/158-05:08:00 DSS: 55 RSR: RSR1A Subchannel: 1 Orbit Number: 27919 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-06:56:00 End Record: 2005/158-07:06:00 DSS: 55 RSR: RSR1A Subchannel: 1 Orbit Number: 27920 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-08:54:00 End Record: 2005/158-09:04:00 -------------------------------------------------------------------------- From aseel@airmail.fltops.jpl.nasa.gov Tue Jun 7 11:27:00 2005 Received: from leland2.Stanford.EDU (leland2.Stanford.EDU [171.67.16.93]) by magellan.stanford.edu (8.11.7p1+Sun/8.11.7) with ESMTP id j57IR0r09337 for ; Tue, 7 Jun 2005 11:27:00 -0700 (PDT) Received: from airmail.fltops.jpl.nasa.gov (airmail2.fltops.jpl.nasa.gov [137.228.96.27]) by leland2.Stanford.EDU (8.12.11/8.12.11) with ESMTP id j57IR18T015299; Tue, 7 Jun 2005 11:27:01 -0700 Received: from rsops2.fltops.jpl.nasa.gov (rsops2.fltops.jpl.nasa.gov [137.228.136.22]) by airmail.fltops.jpl.nasa.gov (Postfix) with ESMTP id 248331091A; Tue, 7 Jun 2005 11:31:49 -0700 (PDT) Received: from rsops2.fltops.jpl.nasa.gov (localhost [127.0.0.1]) by rsops2.fltops.jpl.nasa.gov (8.12.10+Sun/8.12.8) with ESMTP id j57IR0X0021499; Tue, 7 Jun 2005 18:27:00 GMT Received: (from aseel@localhost) by rsops2.fltops.jpl.nasa.gov (8.12.10+Sun/8.12.8/Submit) id j57IR0Tj021498; Tue, 7 Jun 2005 18:27:00 GMT Date: Tue, 7 Jun 2005 18:27:00 GMT From: aseel anabtawi Message-Id: <200506071827.j57IR0Tj021498@rsops2.fltops.jpl.nasa.gov> Content-Type: text To: undisclosed-recipients:; DSS: 15 RSR: RSR1A Subchannel: 1 Orbit Number: 27921 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-10:52:00 End Record: 2005/158-11:01:00 DSS: 15 RSR: RSR1A Subchannel: 1 Orbit Number: 27922 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-12:49:00 End Record: 2005/158-12:59:00 DSS: 15 RSR: RSR1A Subchannel: 1 Orbit Number: 27923 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-14:47:00 End Record: 2005/158-14:57:00 DSS: 15 RSR: RSR1A Subchannel: 1 Orbit Number: 27924 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-16:45:00 End Record: 2005/158-16:55:00 -------------------------------------------------------------------------- From aseel@airmail.fltops.jpl.nasa.gov Thu Jun 9 09:56:07 2005 Received: from leland2.Stanford.EDU (leland2.Stanford.EDU [171.67.16.93]) by magellan.stanford.edu (8.11.7p1+Sun/8.11.7) with ESMTP id j59Gu7r23731 for ; Thu, 9 Jun 2005 09:56:07 -0700 (PDT) Received: from airmail.fltops.jpl.nasa.gov (airmail2.fltops.jpl.nasa.gov [137.228.96.27]) by leland2.Stanford.EDU (8.12.11/8.12.11) with ESMTP id j59Gu5Mt008006; Thu, 9 Jun 2005 09:56:05 -0700 Received: from rsops2.fltops.jpl.nasa.gov (rsops2.fltops.jpl.nasa.gov [137.228.136.22]) by airmail.fltops.jpl.nasa.gov (Postfix) with ESMTP id 8E000109FB; Thu, 9 Jun 2005 10:00:51 -0700 (PDT) Received: from rsops2.fltops.jpl.nasa.gov (localhost [127.0.0.1]) by rsops2.fltops.jpl.nasa.gov (8.12.10+Sun/8.12.8) with ESMTP id j59Gu1X0023144; Thu, 9 Jun 2005 16:56:01 GMT Received: (from aseel@localhost) by rsops2.fltops.jpl.nasa.gov (8.12.10+Sun/8.12.8/Submit) id j59Gu0JG023143; Thu, 9 Jun 2005 16:56:00 GMT Date: Thu, 9 Jun 2005 16:56:00 GMT From: aseel anabtawi Message-Id: <200506091656.j59Gu0JG023143@rsops2.fltops.jpl.nasa.gov> Content-Type: text To: undisclosed-recipients:; DSS: 43 RSR: RSR1A Subchannel: 1 Orbit Number: 27924 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-16:45:00 End Record: 2005/158-16:55:00 DSS: 43 RSR: RSR1A Subchannel: 1 Orbit Number: 27925 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-18:43:00 End Record: 2005/158-18:52:00 DSS: 43 RSR: RSR1A Subchannel: 1 Orbit Number: 27926 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-20:40:00 End Record: 2005/158-20:50:00 DSS: 43 RSR: RSR1A Subchannel: 1 Orbit Number: 27927 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/158-22:38:00 End Record: 2005/158-22:48:00 DSS: 43 RSR: RSR1A Subchannel: 1 Orbit Number: 27928 Occultation Sense: i SOE: mm445b.03.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2005/159-00:36:00 End Record: 2005/159-00:46:00 -------------------------------------------------------------------------- From sami.asmar@jpl.nasa.gov Thu Jun 9 12:22:35 2005 Date: Thu, 09 Jun 2005 12:06:31 -0700 To: rsimpson@magellan.stanford.edu, daniel.s.kahan@jpl.nasa.gov From: Sami Asmar Subject: Fwd: MEX caught in the act Mime-Version: 1.0 X-Source-IP: vpn-149-246-039.jpl.nasa.gov [128.149.246.39] X-Source-Sender: sami.asmar@jpl.nasa.gov X-AUTH: Internal IP --=====================_91709080==_ Content-Type: text/plain; charset="us-ascii"; format=flowed Dick, Danny did excellent investigative work about the spur you reported. He has narrowed it down to a MEX signal. Please see and react to his message below. Once we get your feedback, we can have a more formal write-up. This, by the way, is somewhat consistent with a problem reported a while back where MEX complained that the MGS range channel is interfering with them. Sami >Date: Wed, 08 Jun 2005 15:56:44 -0700 >From: Daniel S Kahan >Subject: MEX caught in the act >To: sami.asmar@jpl.nasa.gov >X-Mailer: iPlanet Messenger Express 5.2 HotFix 1.25 (built Mar 3 2004) >X-Accept-Language: en >Priority: normal >X-Source-IP: eis-msg-065.jpl.nasa.gov [137.78.160.102] >X-Source-Sender: Daniel.S.Kahan-121461@jpl.nasa.gov >X-AUTH: Internal IP >Original-recipient: rfc822;asmar@mail.jpl.nasa.gov > >We believe that the anomalous signal in MGS recordings reported by >Stanford most likely originates from the MEX spacecraft. On June 7, MGS >was being tracked from 17:00 to 02:20 UTC at DSS 43. MEX was transmitting >2-way with the New Norcia station and was scheduled to terminate its >downlink at 23:24:43 ERT. Immediately leading up to that time, MGS >happened to be in occultation, but a signal was visible, moving rapidly >within MGS predicts. At 23:08 the frequency residual was around +87000 Hz, >and by 23:17 it had moved to a residual of 0 Hz, where it would have >appeared in the usual 2 KHz recording bandwidth had there been an ingress >at that time. At 23:24:40, just before termination of the MEX downlink, >the signal was still visible at a frequency residual near -50000 Hz >(figure MGS1). Then the MEX downlink disappeared as scheduled (also viewed >on DSS 43 with MEX predicts), and the signal within MGS predicts >disappeared as well (figure MGS2). Figure MGS2 shows that the signal was >gone by 23:25:00.