PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2007-07-29 NOTE = " E-mail and other messages concerning MGS Radio Science on or about 1999/182." END_OBJECT = TEXT END From ppriest@airmail.fltops.jpl.nasa.gov Fri Jul 2 17:38:20 1999 Received: from nyx.fltops.jpl.nasa.gov (nyx.fltops.jpl.nasa.gov [137.228.90.11]) by magellan.stanford.edu (8.8.5/8.8.3) with SMTP id RAA10945; Fri, 2 Jul 1999 17:38:20 -0700 (PDT) Received: by nyx.fltops.jpl.nasa.gov; id RAA26544; Fri, 2 Jul 1999 17:37:24 -0700 Received: from airmail.fltops.jpl.nasa.gov(137.228.96.12) by nyx.fltops.jpl.nasa.gov via smap (V4.2) id xma026476; Fri, 2 Jul 99 17:37:11 -0700 Received: from mmrs.fltops.jpl.nasa.gov (mmrs.fltops.jpl.nasa.gov [137.228.136.10]) by airmail.fltops.jpl.nasa.gov (8.9.3+Sun/8.9.3) with ESMTP id RAA07975; Fri, 2 Jul 1999 17:38:43 -0700 (PDT) Received: (from ppriest@localhost) by mmrs.fltops.jpl.nasa.gov (8.8.8+Sun/8.8.8) id AAA24383; Sat, 3 Jul 1999 00:38:07 GMT Date: Sat, 3 Jul 1999 00:38:07 GMT From: "Kathy L. Adams" Message-Id: <199907030038.AAA24383@mmrs.fltops.jpl.nasa.gov> DSS: 54 Content-Type: text Apparently-To: Apparently-To: Content-Length: 555 Status: R Orbit: 1403e SOE: mm005c.03.tsoe Begin Record: 182/16:18:00 End Record: 182/16:26:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1404e SOE: mm005c.03.tsoe Begin Record: 182/18:15:00 End Record: 182/18:23:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1405e SOE: mm005c.03.tsoe Begin Record: 182/20:13:00 End Record: 182/20:21:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1406e SOE: mm005c.03.tsoe Begin Record: 182/22:10:00 End Record: 182/22:18:00 Last Attenuation Change: SNT: Elevation Angle: -------------------------------------------------------------------------- From trish@godzilla.jpl.nasa.gov Thu Jul 1 13:47:58 1999 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.8.5/8.8.3) with ESMTP id NAA09533 for ; Thu, 1 Jul 1999 13:47:57 -0700 (PDT) Received: from rodan.jpl.nasa.gov (rodan.jpl.nasa.gov [137.78.177.110]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with ESMTP id NAA10545 for ; Thu, 1 Jul 1999 13:47:53 -0700 (PDT) Received: from 137.78.177.117 (trish-mac.jpl.nasa.gov [137.78.177.117]) by rodan.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id NAA14123 for ; Thu, 1 Jul 1999 13:47:52 -0700 (PDT) Message-Id: <199907012047.NAA14123@rodan.jpl.nasa.gov> Date: 01 Jul 99 13:53:22 -0700 From: Trish Priest Subject: SPC 40 DSP 1 To: Richard Simpson X-Mailer: QuickMail Pro 1.5.4 (Mac) X-Priority: 3 Reply-To: Trish Priest MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="US-Ascii" Content-Length: 241 Status: RO Hello, Dick, Would your quick look processing show phase jitter? The station personnel at SPC 40 think that DSP 1 may be having phase problems. DSP 1 was used to collect data on the following days (recently): 172, 181, and 182. -Trish -------------------------------------------------------------------------- From ppriest@airmail.fltops.jpl.nasa.gov Wed Jun 30 22:03:18 1999 Received: from nyx.fltops.jpl.nasa.gov (nyx.fltops.jpl.nasa.gov [137.228.90.11]) by magellan.stanford.edu (8.8.5/8.8.3) with SMTP id WAA09735; Wed, 30 Jun 1999 22:03:18 -0700 (PDT) Received: by nyx.fltops.jpl.nasa.gov; id WAA26891; Wed, 30 Jun 1999 22:02:23 -0700 Received: from airmail.fltops.jpl.nasa.gov(137.228.96.12) by nyx.fltops.jpl.nasa.gov via smap (V4.2) id xma026788; Wed, 30 Jun 99 22:02:00 -0700 Received: from mmrs.fltops.jpl.nasa.gov (mmrs.fltops.jpl.nasa.gov [137.228.136.10]) by airmail.fltops.jpl.nasa.gov (8.9.3+Sun/8.9.3) with ESMTP id WAA10678; Wed, 30 Jun 1999 22:03:29 -0700 (PDT) Received: (from ppriest@localhost) by mmrs.fltops.jpl.nasa.gov (8.8.8+Sun/8.8.8) id FAA15419; Thu, 1 Jul 1999 05:02:54 GMT Date: Thu, 1 Jul 1999 05:02:54 GMT From: "Kathy L. Adams" Message-Id: <199907010502.FAA15419@mmrs.fltops.jpl.nasa.gov> DSS: 25 Content-Type: text Apparently-To: Apparently-To: Content-Length: 278 Status: RO Orbit: 1396e SOE: mm005c.03.tsoe Begin Record: 182/02:34:00 End Record: 182/02:41:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1397e SOE: mm005c.03.tsoe Begin Record: 182/04:32:00 End Record: 182/04:39:00 Last Attenuation Change: SNT: Elevation Angle: -------------------------------------------------------------------------- From ppriest@airmail.fltops.jpl.nasa.gov Thu Jul 1 07:59:11 1999 Received: from nyx.fltops.jpl.nasa.gov (nyx.fltops.jpl.nasa.gov [137.228.90.11]) by magellan.stanford.edu (8.8.5/8.8.3) with SMTP id HAA09080; Thu, 1 Jul 1999 07:59:10 -0700 (PDT) Received: by nyx.fltops.jpl.nasa.gov; id HAA22123; Thu, 1 Jul 1999 07:58:16 -0700 Received: from airmail.fltops.jpl.nasa.gov(137.228.96.12) by nyx.fltops.jpl.nasa.gov via smap (V4.2) id xma021840; Thu, 1 Jul 99 07:57:17 -0700 Received: from mmrs.fltops.jpl.nasa.gov (mmrs.fltops.jpl.nasa.gov [137.228.136.10]) by airmail.fltops.jpl.nasa.gov (8.9.3+Sun/8.9.3) with ESMTP id HAA16871; Thu, 1 Jul 1999 07:58:47 -0700 (PDT) Received: (from ppriest@localhost) by mmrs.fltops.jpl.nasa.gov (8.8.8+Sun/8.8.8) id OAA17090; Thu, 1 Jul 1999 14:58:12 GMT Date: Thu, 1 Jul 1999 14:58:12 GMT From: "Kathy L. Adams" Message-Id: <199907011458.OAA17090@mmrs.fltops.jpl.nasa.gov> DSS: 45 Content-Type: text Apparently-To: Apparently-To: Content-Length: 671 Status: RO Orbit: 1398e SOE: mm005c.03.tsoe Begin Record: 182/06:29:00 End Record: 182/06:37:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1399e SOE: mm005c.03.tsoe Begin Record: 182/08:27:00 End Record: 182/08:35:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1400e SOE: mm005c.03.tsoe Begin Record: 182/10:24:00 End Record: 182/10:32:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1401e SOE: mm005c.03.tsoe Begin Record: 182/12:22:00 End Record: 182/12:30:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 1402e SOE: mm005c.03.tsoe Begin Record: 182/14:20:00 End Record: 182/14:28:00 Last Attenuation Change: SNT: Elevation Angle: -------------------------------------------------------------------------- From trish@godzilla.jpl.nasa.gov Tue Jul 6 10:23:40 1999 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.8.5/8.8.3) with ESMTP id KAA12663 for ; Tue, 6 Jul 1999 10:23:38 -0700 (PDT) Received: from rodan.jpl.nasa.gov (rodan.jpl.nasa.gov [137.78.177.110]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with ESMTP id KAA18323 for ; Tue, 6 Jul 1999 10:22:45 -0700 (PDT) Received: from 137.78.177.117 (trish-mac.jpl.nasa.gov [137.78.177.117]) by rodan.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id KAA16749 for ; Tue, 6 Jul 1999 10:22:43 -0700 (PDT) Message-Id: <199907061722.KAA16749@rodan.jpl.nasa.gov> Date: 06 Jul 99 10:29:07 -0700 From: Trish Priest Subject: Egress To: Richard Simpson X-Mailer: QuickMail Pro 1.5.4 (Mac) X-Priority: 3 Reply-To: Trish Priest MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="US-Ascii" Content-Length: 589 Status: R > Starting 1999/182-02:34:00 we collect only egress events with >telemetry on (-15 dB SNR compared with telemetry off). In most of these >data, the carrier level increases about 1 dB approximately 1 minute after >AOS. It is not clear from the data whether AOS is from egress or from >a spacecraft event (such as turning the transmitter on). AOS is due to the spacecraft transmitter turning on. Egress has already happend. The transmitter is turned on after the HGA rewind is complete. The spacecraft usually goes two-way right after the atmospheric occultation ends. -Trish -------------------------------------------------------------------------- From Walter.J.Glance@jpl.nasa.gov Mon Jun 28 09:30:56 1999 Received: from eis-msg-014.jpl.nasa.gov (eis-msg-014.jpl.nasa.gov [137.78.160.189]) by magellan.stanford.edu (8.8.5/8.8.3) with ESMTP id JAA27513 for ; Mon, 28 Jun 1999 09:30:55 -0700 (PDT) Received: from [137.78.144.45] (jglance-mac.jpl.nasa.gov [137.78.144.45]) by eis-msg-014.jpl.nasa.gov (8.8.5/8.8.5) with ESMTP id JAA04138; Mon, 28 Jun 1999 09:31:21 -0700 (PDT) X-Sender: jglance@pop.jpl.nasa.gov Message-Id: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 28 Jun 1999 09:30:50 -0700 To: William.B.Banerdt@jpl.nasa.gov, john.l.callas@jpl.nasa.gov, Timothy.J.Parker@jpl.nasa.gov, rspringe@mail1.jpl.nasa.gov, danielw@jplsp2.jpl.nasa.gov, fpalluco@mail1.jpl.nasa.gov, warren@msss.com, malin@msss.com, mehall@asu.edu, elman@elysium.gsfc.nasa.gov, mha@lepmom.gsfc.nasa.gov, dwc@sunspot.ssl.berkeley.edu, jester@osb1.wff.nasa.gov, jensen@msss.com, kcbender@asu.edu, rsimpson@magellan.stanford.edu, monte.kaelberer@gsfc.nasa.gov, Jeff Schott , homan@asu.edu, len@nova.stanford.edu From: Jesse Glance Subject: Significant Change in MGS Operations Cc: tthorpe@mail1.jpl.nasa.gov Content-Length: 4723 Status: RO FYI. ------------ >Status: U >X-Sender: rgtorres@pop.jpl.nasa.gov >Date: Mon, 28 Jun 1999 09:16:45 -0700 >To: jglance >From: Ricardo G Torres >Subject: Significant Change in MGS Operations >Mime-Version: 1.0 > >>Date: Mon, 28 Jun 1999 09:52:37 -0600 >>From: "McMechen, Angus M" >>Subject: Significant Change in MGS Operations >>To: "'Gene Sax'" , >> "'Josephine Conley'" , >> Mike Kennedy , >> "'Pat Donovan'" >>Cc: "Spath, Stuart R" , >> "Starnes, Kenny R" , >> "Beerer, Joseph G (X-JPL.NASA.GOV)" , >> "'Trish Priest'" , >> "Martin, Kyle W" , >> "Sidney, Wayne P" , >> "Short, Owen G" , >> Angus McMechen , >> Scott Toro-Allen , >> William Adams , >> "'Bruce Waggoner'" , >> "'Nora Mainland'" , >> "'Reid Thomas'" , >> "'Ricardo Torres'" >>X-Mailer: Internet Mail Service (5.5.2232.9) >> >>Pat, et al >> >>When the MGS MM005 sequence begins on DOY 182 you should expect to see a >>significant change in how a "typical" orbit operates. Indeed, there will >>now be several types of orbits and I have attempted to describe how it all >>works below. The map is an pretty good representation of what is happening >>on each orbit. Try the following link: >> >>http://mgsw3.jpl.nasa.gov/seq/mgsct/sct.html >> >>EARTH OCCULTATION IS NOT LONGER THE DRIVING FORCE >> - Because occultations are going away for three to four months, we will >>begin to sequence activities with respect to solar eclipse ingress and >>egress. >> - The spacecraft transmitter turns off about one minute after entering >>solar eclipse and then on about 12 minutes after exiting eclipse (this is >>done to allow the HGA rewind to complete before the station gets the >>"acquire D/L" message). >> - The uplink transmitter is managed such that it is turned off about two >>minutes after entering eclipse and then back on so that we go two-way just >>as we exit the upper atmosphere (more on that later). >> >>THERE IS NO TRADITIONAL RADIO SCIENCE >> - Special grazing radio science occurs at egress only. It will still be >>one-way, but there will be modulation and data at the same time (never >>carrier only as before). >> - In order to achieve one-way we are suppressing the uplink until the >>atmosphere ends. Unfortunately, the two-way transition occurs during the >>science playback and there would be a potential for data loss were it not >>for the fact that the recorder overlap has been increased to six minutes to >>protect the data. What you'll see in the SOE is the start of the playback >>and then the two-way transition about three minutes later. If the station >>does not lock up two-way in three minutes there will be some science data >>lost. >> >>PERIODS OF SUBCARRIER MODULATED, 0 BPS SIGNAL >> - A change has been made to the sequencing software to protect the MOC data >>before and after playbacks and when partial orbits occur. This results in >>periods of modulated, 0 BPS signal that are about 60 seconds in duration. >>This can occur at the beginning of the orbit before a playback, or after a >>playback and before the transmitter is turned off at eclipse entry. >> - Both the SOE and the DKF show the proper bit rates (including the 0 BPS >>periods) and telemetry predicts should take care of this for us. >> >>SOE/DKF UPDATED WEEKLY >> - We receive a new, updated OPTG file from Nav every Monday night. We are >>requesting that the SIEs automatically re-run the SOE and DKF products every >>Tuesday morning and release the updated files to the DSN server when >>complete. >> >>If you have any questions or observe any recurring problems please contact >>myself, Bill Adams, or Wayne Sidney ASAP. >> >>Please distribute this information to your respective staff members as you >>see fit. >>Kyle, please forward this on to each of the ACEs. >> >>Regards, >> >>Angus >>":^) >> >>Angus M. McMechen >>LOCKHEED MARTIN ASTRONAUTICS >>303-971-4365 (Voice) 303-977-7515 (FAX) >>E-mail: angus.m.mcmechen@lmco.com >> >> > (Walter J. Glance, Jr.) E-Mail: Walter.J.Glance@jpl.nasa.gov Phone: 818 393-0630/ Pager: 800 759-8888 pin 1192339/ Fax: 818 393-3147 / Text Paging: 1192339@skytel.com -------------------------------------------------------------------------- From trish@godzilla.jpl.nasa.gov Fri Jun 25 10:52:42 1999 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.8.5/8.8.3) with ESMTP id KAA25382 for ; Fri, 25 Jun 1999 10:52:41 -0700 (PDT) Received: from rodan.jpl.nasa.gov (rodan.jpl.nasa.gov [137.78.177.110]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with ESMTP id KAA11807; Fri, 25 Jun 1999 10:52:36 -0700 (PDT) Received: from 137.78.177.117 (trish-mac.jpl.nasa.gov [137.78.177.117]) by rodan.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id KAA09316; Fri, 25 Jun 1999 10:52:35 -0700 (PDT) Message-Id: <199906251752.KAA09316@rodan.jpl.nasa.gov> Date: 25 Jun 99 10:58:07 -0700 From: Trish Priest Subject: July Occultations To: David Hinson , Richard Simpson , Joe Twicken , Len Tyler X-Mailer: QuickMail Pro 1.5.4 (Mac) X-Priority: 3 Reply-To: Trish Priest MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="US-Ascii" Content-Length: 1469 Status: RO Hello, Sometime in the very near future the surface occultations (both ingress and egress) should begin to be obscured by the HGA rewind. For the July spacecraft sequence, the spacecraft transmitter will be turned off for solar eclipse and will be turned back on right after the HGA rewind is complete. The Spacecraft Team was concerned about rewinding the HGA with the transmitter on. Therefore, starting on July 1st (DOY 182), we will only get egress measurements. (The ingresses are finally going away almost 6 weeks after we originally expected.) The spacecraft will be one-way for egress. Uplink has been delayed a bit to give us the time from HGA rewind completion to atmosphere egress. Telemetry will be on. Playback begins right after rewind completion, so there will be a glitch in telemetry due to this delay. However, the spacecraft will be playing back redundant data so it will not cause a problem. During one-way passes and the extra one-way orbits that we obtained with the MCR, we will be able to obtain longer baselines. We will continue to collect data until there are no more atmospheric occultations or until you ask us to stop. It would be helpful to know before July 15th whether or not you will want the sequence to be the same for August. I have asked the Spacecraft Team to look at the HGA rewind as occultations begin again in November/December. Hopefully, the geometry will be more in our favor. Thanks. -Trish