Please note - polarization modes are switching, take care when selecting job time ranges. From bclark@nrao.edu Mon Jan 24 08:48:04 2005 Return-Path: Date: Mon, 24 Jan 2005 08:48:03 -0700 (MST) From: Barry Clark To: analysts@nrao.edu Subject: Re: BG155 request for reobservation Cc: schedsoc@nrao.edu X-Sun-Charset: US-ASCII Content-Length: 99 X-Lines: 5 Status: RO No, I couldn't find a way to get phased VLA and GBT this winter. > Was a reobs granted? > > Meri From lincoln@cfa.harvard.edu Fri Jan 14 01:35:29 2005 Return-Path: Date: Fri, 14 Jan 2005 03:33:13 -0500 (EST) From: Lincoln Reply-To: lincoln greenhill To: schedsoc@aoc.nrao.edu cc: mclausse@nrao.edu, analysts@nrao.edu, "Andrew S. Wilson" , christian henkel , Alison Peck , jim braatz Subject: BG155 request for reobservation MIME-Version: 1.0 X-MailScanner-Information: Please contact postmaster@cv.nrao.edu for more information X-MailScanner: Found to be clean X-MailScanner-SpamCheck: not spam, SpamAssassin (score=-4.9, required 7, autolearn=not spam, BAYES_00 -4.90) X-MailScanner-From: lincoln@cfa.harvard.edu X-Lines: 49 Status: RO X-Status: In the hope that a new track would be possible during the 05 winter (VLBA+Y27+GBT), I would like to request a reobservation for BG155 without correlation of the data collected on 12/30/04. The success of the experiment depends strongly on our obtaining good data from both the VLA and GBT (weak maser line for self-cal + a v. low dec. source) and a reasonable yield from the SW-array+SC+NL. During the 12/30 track, Mark has determined that the VLA (which was unfortunately in A-config) was essentially unphased because of poor sky conditions. In addition, the weather across the SW-array was terrible, with either rain or high winds. A more detailed summary follows. If rescheduling is not possible, then please correlate the december track and let us know what constraints figured foremost in the decision. Regards, Lincoln Track:07-15 UT Y27:07.5-14 UT Terrible phasing. Steady wind of ~20 mph with gusts to 35 mph. High moisture content in the air. Pointing scans only partly successful. 09.6-10.1 UT Power failure. No data. 10.1-end Backup power. Array adopts staggered slews. All scans lose the first ~ 1 minute or 25% of many cal scans. GBT: < 08 UT drizzle possible earlier. Mix of partly clear and overcast 07-12 UT dynamic control system not working. However, ambient temperature was relatively stable and hourly pointing checks mean data probably OK. Tsys OK. FD: 13.7-14.5 UT Out of tape on one drive during 512 Mbps ops. PT, LA: 07- UT Rain recorded in ops log. Tsys large. KP: 07- UT Gusts to 20+ mph till last 2.5 hours. Some > 35 mph NL: 10- UT Rain. Wind approaching 20 mph for last 2 hours. Tsys huge. OV: 07- UT Gusts > 20mph. KP: 10.7-13.0 UT loss of vacuum on tape drive 3 times for up to 5 min -- Lincoln J. Greenhill Harvard-Smithsonian Center for Astrophysics Office: 1 617-495-7194 60 Garden St, Cambridge, MA 02138 Cell: 1 617 851 8918 E-mail: greenhill@cfa.harvard.edu FAX: 1 617-495-7345 http://cfa-www.harvard.edu/~lincoln