Title: CAL - DA193
Session: February 1996 (session 1)
Frequency: 18 cm
Obs time (UT): 40 EU 14:00(09/02)-14:30(09/02)
Obs time (UT): 45 EU 16:30(14/02)-17:30(14/02)
EU Mk3 Tapes/St.: 1
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Westerbork (foley at Fri Feb 16 05:49:43 EST 1996) Minor failures
the first section (UT 1400-1413) the source is out of limits
Flux DA193 ~ 2.08Jy polarization <2%
Onsala (John Conway at Mon Feb 19 07:51:52 EST 1996) Minor failures
First part, phase cals may be large and increase system noise in a couple of channels Second Part. due to an error restarting schedule first two out of four tape passes were lost. Note that between first and second parts capstan was replaced as was capstan motor and head positions were recalibrated.
Simeiz (Alexandre Volvatch at Wed Feb 21 08:43:53 EST 1996) Success
On day 40 clock offset=0.6 microsec.
Temp: 6 C; Press: 754 mm hg; Humid: 45 %; Cloudy.
On day 45 clock offset=0.9 microsec
Temp: 8 C; Press: 765 mm hg; Humid: 80-87%; Clear.
Urumqi (Lee Suqin at Wed Feb 21 09:15:17 EST 1996) Minor failures
On 9 Feb:cal temprature is 45k the system temperature is very high
because there is one contactor in Lo being loosn. It is a fine day.
Observation is OK.
On 14 Feb: Cal temprature is 103k and the system temprature is about
210k. It is cloudy. Observation is OK.
Jodrell (Dave Henstock at Thu Feb 22 05:55:17 EST 1996) Minor failures
Bad RFI during both parts of experiment - probably worst in first part..
VCs 9,10 worst affected, but sporadic interference in VCs 4,7,11,12
too. Due to RFI, Tsys measurements only crudely calibrated.
Specific Problems: Day 45 16:30 - 16:48 Field system crash - some or
all of the data in this period was lost (some time on wrong pass). Tsys is in Jy. Need to multiply measured
Tsys by 1.23 for better calibration.
Cambridge (Dave Henstock at Thu Feb 22 05:57:33 EST 1996) Success
No problems. Note that there are no Tsys measurements for Cambridge. Tsys
is 212 Jy (from EVN status).
Medicina (Venturi Tiziana at Thu Feb 22 09:37:57 EST 1996) Success
Experiment carried out successfully. No problems reported.
Noto (Corrado Trigilio at Sat Feb 24 05:47:06 EST 1996) Minor failures
No phase cal for the 18cm receiver. Observations carried out
successfully. Accidentally log file has been lost for first part of
Shanghai (Huang Xinyong at Fri Mar 1 04:29:39 EST 1996) Success
All observations took place, but only in LCP.
On day 40: clock offset = -1.0 usec, no phase cal signal.
Weather was fine.
On day 45: clock offset = -0.9 usec, with phase cal signal.
Weather was overcast with strong win.