GR011B

PI: Rottgering

Title: Variable sc. at 151 MHz

Session: February 1996 (session 1)

Frequency: 18 cm

Mode: B

Obs time (UT): 46 EU 21:30(15/02)-07:30(16/02)

Obs time (UT): 46 US 21:30(15/02)-07:30(16/02)

Stations: SLNJW

Processor: Bonn

EU Mk3 Tapes/St.: 2

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Onsala (John Conway at Mon Feb 19 08:28:32 EST 1996) Minor failures

Phase-cal switched off was causing increase in Tsys in some channels. No other known problems.

Jodrell (Dave Henstock at Thu Feb 22 07:04:59 EST 1996) Minor failures

RFI in observing band - particularly bad in VCs 9,10. No Tsys measurements for this experiment as cal diode switched off to prevent field system crashing. Specific Problems: Day 46 21:30-01:15 Telescope azimuth,elevation offset incorrect by 0.02,0.02 degrees from experiment start until 01:15. May result in reduced signal (offset error is ~20% of telescope primary beam). Many scans have telescope late on-source due to slew. No other problems. Tsys is in Jy, need to multiply measured Tsys by 1.23 for better calibration.^M Note that there are no Tsys readings from Jodrell for this experiment as cal diode switched off, so ANCAL and ANTAB format files on VLBEER do not have Tsys entries either. You might want to insert example values from GR11A.

Medicina (Venturi Tiziana at Thu Feb 22 10:04:09 EST 1996) Success

Apparently no problems.

Noto (Corrado Trigilio at Sat Feb 24 06:32:00 EST 1996) Success

All right for this experiment. Corrected Tsys values will be provvided.

Westerbork (foley at Mon Feb 26 11:48:31 EST 1996) Success

Field system giving false alarms "Reproduce track B does not check with request"

Calibration (Fredrik T Rantakyro at Thu Sep 26 10:10:27 EDT 1996) Minor failures

An ANTAB formatted file for the experiment can be found on VLBEER