Station report for Effelsberg
=============================


o the crack in the azimuth rail was repaired in March 2003.

o the 2cm and 1.3cm receivers underwent a revision. Now their
  system temperature is much lower than before (especially
  for the 1.3cm system).

o a Mk5 system was purchased and used succesfully during the
  test observations in May/June 2003.

o the water vapour radiometer has been moved to the telescope
  site. After some test measurements, data was collected during
  the 3mm CMVA run in April 2003; the analysis is still in
  progress. For more information see:
   http://www.mpifr-bonn.mpg.de/staff/aroy/wvr.html

o holographic measurements of the antenna surface continues and
  so does the adjustment of the panels.



Updates concerning the EVN Status table
---------------------------------------

TABLE II

1) New receivers available:

 none

2) Changes or new measurements of the  SEFD (sytem noise in Jy):

 13cm: 300 Jy    5cm: 25 Jy    1.3cm: 90 Jy   0.7cm: 500 Jy

3) Changes in polarization characteristics:

none

4) Check and update the frequency range of each telescope at
   UHF band (30+ cm)  (Footnote % in Table II)

no changes

5) Check and update the frequency range at 21cm (Footnote # in Table II)

no changes

6) Plans to built new receivers?

developement of a new 21/18cm system has just been started


TABLE III: Frequency Agility

Please update the information on receiver agility considering the
following points

7) Switch time between different frequencies (ie 6, 3.6 2cm)

40 s

8) Is the switching under schedule control ?

partly (as described in the status table)

9) 18cm - 21cm Switching:
   Is this under schedule control ? yes
   How long does the change take ?  40 s
   Are changes in the schedule (SNAP) file required at the stations ? no

10) 5cm: 6.0-6.7 GHz:
    Is it possible to change the frequency during the same experiment?  yes
    Is the change under schedule control ?  yes
    Are changes in the schedule (SNAP) file required at the stations ? no


A. Kraus
June 2003