From fghigo@nrao.edu Mon Dec 29 10:06 MST 2003 Date: Mon, 29 Dec 2003 12:05:55 -0500 From: Frank Ghigo User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Jim Ulvestad CC: gbt , "analysts@aoc.nrao.edu" Subject: BU207B observed at Green Bank Content-Transfer-Encoding: 7bit X-MailScanner: Found to be clean, Found to be clean X-MailScanner-SpamCheck: not spam, SpamAssassin (score=-5.2, required 7, BAYES_00 -5.20, USER_AGENT_MOZILLA_UA 0.00), not spam, SpamAssassin (score=-5.4, required 7, BAYES_01 -5.40, USER_AGENT_MOZILLA_UA 0.00) X-MailScanner-Information: Please contact postmaster@aoc.nrao.edu for more information X-Lines: 38 Status: RO VLBA project BU027B was observed with the GBT. Problems: 1. Delay in starting due to software problem with the glish control program. 2. sources missed due to azimuth unwrap 05:35-05:45 UT. 3. frequent error messages from LO1 about "5MHz/1pps sync loss" We don't know if this is a real problem. Otherwise things generally went smoothly. The weather was clear and cold. Due to problem 1, the "onsource" flag in the station computer log data was not correct until 06:12 UT. Problem 1 was because the glish system running on solaris systems needs to have a reference to "ucblib" in its LD_LIBRARY_PATH. It never needed this before, but after fixing this, the GBT to VLBA communication worked as usual. Receiver changes were reasonably smooth. The new config_tool was used to change configurations for the receiver changes, and it worked just fine. The receiver changes took 5-20 minutes, resulting in a few scans missed just after each change. Log of missed time (UT) 05:00 - 05:07:17 late startup 05:35 - 05:45 azimuth unwrap 06:09:20 - 06:19:10 receiver change 07:46:00 - 08:03:52 receiver change 09:13:20 - 09:20:10 receiver change 10:52:20 - 11:03:20 receiver change 12:21:30 - 12:26:00 receiver change 13:57:30 - 14:05:00 receiver change The tapes are being shipped to Socorro today. -- frank