User Tools

Site Tools


operations:down_under_2015_11_10_minutes

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

operations:down_under_2015_11_10_minutes [2015/11/10 23:04] (current)
Ed Himwich created
Line 1: Line 1:
 +Nov 10, 2200UT
 +
 +Rich and Stuart not available; Jim Palfreyman attending
 +
 +1. Any new issues from Warkworth?
 +
 +2. Any new issues from Auscope?
 +
 + Brett and Jim L: worked on S-band waveguide on Ho26 and improved
 +   ​S-band performance by a dB
 +
 +3. FMSET "​freezing"​ issue at Warkworth
 +
 +4. Follow-up on clock breaks.
 +
 +   Jim P.: tried to line up clock breaks below with spikes on power
 +    monitor, but didn't find much correlation,​
 +    seeing strange RFI in pulsar measurements
 +    if clock jumps from below July for Ho are available please send
 +    and will try to correlate
 +   Ed: try cable cal for comparison of masers, will ask Brian to send
 +    set-up
 +
 +   ​Recent reported breaks:
 +     r4704 (Sep10)
 +       ​KATH12M had three clock breaks: one break has same magnitudes in
 +       SB and group delays on both bands (perhaps, a real clock break),
 +       it appeared on 15/09/11 10:50 with the magnitude of about -11ns
 +       (plus some band-dependent remainders). The other two clock
 +       ​breaks are visible only on the X-band and have small magnitudes:
 +       ​epoch:​ 15/09/11 06:05 magnitude: 0.716ns
 +              15/09/11 14:12           ​-1.737ns
 +     r4706 (Sep24)
 +       A small (~0.75ns) clock break on the X-band is visible for
 +       ​KATH12M observations at 15/09/25 06:54.
 +     r1708 (Oct05)
 +       Clock break at Kath12m ~16:11:06 (-.7 nsec).
 +       Clock break at Yarra12m ~00:33;17 (.9 nsec).
 +     r1709 (Oct13)
 +       ​HOBART26:​ clock break at ~02:17:22 (-3.5 nsec).
 +     r1710 (Oct19)
 +       ​Hobart26 breaks at ~06:31:22 (+.7 nsec) and ~15:40:47 (-.9
 +       ​nsec).
 +
 +5. Final testing of windstow recovery fix.
 +
 +   Jim L.: test feed on 12m coming down tomorrow, then can do tests
 +
 +6. NTP (pcfshb & others): need more stratum 1 servers
 +
 +   Jim L.: still to do
 +
 +7. r4711 katherine
 +     fs unresponsive. Required a reload. No impact. Probably not the
 +     FS but what happened? It would help if operators provided more
 +     ​specifics.
 +
 +   Jim L.: will address with operators
 +
 +8. Ed: time
 +
 +   Ed: Don't use FS time to set 5B;
 +       Use Computer time but it may be wrong for a few minutes after a
 +       boot until NTP syncs
 +       Will send info on making sure NTP is sync'd and FS environment
 +       ​variable for checking (and its limitations)
 +
 +9. Jamie: Continuous cal Tsys logging:
 +          how to get more measurements per scan?
 +   Ed: can use caltsys in preob to get a single measurement
 +       ​caltsys just has tpicd=tsys,
 +       you can put caltsys in preob (don't put in midob though)
 +
 +       MORE IMPORTANT: in skedf.ctl use 'tpcid NO 100' instead of
 +                       '​tpicd NO 300'
 +                       if that doesn'​t slow it down too much 100 is
 +                       the best value
  
/home/www/auscope/opswiki/data/pages/operations/down_under_2015_11_10_minutes.txt · Last modified: 2015/11/10 23:04 by Ed Himwich