C97L1

PI: Sanghera

Title: CAL

Session: Feb 1997 (session 1)

Frequency: 18 cm

Mode: A/PI

Obs time (UT): EU 22:00(01/03)-23:30(01/03)

Stations: EbHhJbMcNtOnTrShUrWb

Processor: Bonn

EU Mk3 Tapes/St.: 1

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Experiment Feedback

HartRAO (Jonathan Quick at Sat Mar 1 18:01:06 EST 1997) Minor failures

Reads heads failing - Write heads status unknown First VLBI test of dual polarisation 18cm receiver

Onsala (Antonis Polatidis at Sat Mar 1 18:07:25 EST 1997) Success

Strong winds 13-15m/s (above the telescope stow limit). nevertheless we observed and there were no problems in the antenna tracking. Success

Effelsberg (dgraham at Tue Mar 4 03:05:49 EST 1997) Minor failures

Occasional VC11 problem

Westerbork (Ton Foley at Tue Mar 4 06:45:28 EST 1997) Success

Looks OK.

Shanghai (Huang Xinyong at Wed Mar 5 05:16:46 EST 1997) Success

Clock offset = 0.61-0.63 msec. No problems, weather cloudy.

Westerbork (Tony Foley at Mon Mar 10 06:03:07 EST 1997) Minor failures

I found that the attenuation settings were too low for the RCP part, so that the VCs are saturated. This gives no sensible total power/tsys information and may give poor fringes.

Jodrell (Alastair Gunn at Tue Mar 18 13:09:17 MET 1997) Minor failures

Very bad interference. Although winds were high we observed the calibration experiment with no apparent problems.

Medicina (Tiziana Venturi at Tue Mar 18 13:42:01 MET 1997) Failure

Failed to observe as Medicina not indicated as to participate in the block schedule.

MPIfR (Correlator gang at Fri Mar 21 13:20:33 MET 1997) Minor failures

Onsala Polarisation swapped, Urumqi only RCP recorded, Jodrell clock 20musec away from GPS value, Effelsberg+Torun+Shanghai +Hartebeesthoek OK, WSRT antenna9 polarization elliptical.

Calibration (Fredrik T Rantakyro at Thu May 8 11:38:34 METDST 1997) Success

The ANTAB file for the experiment has been placed on VLBEER in the Feb97 directory with the name c97l1.antab. This file contains the preliminary calibration results and may be updated when I receive updated information from the telescopes and the results from the datareduction of the calibration experiments.