Torun Station Report for TOG (2003 June 30)

Personnel Changes
-----------------
None.

Brief Report of Last EVN Sessions
--------------------------------
 In November 2002 session Tr had no fringes in FFT due to a problem
with the LO lock. Thanks to quick feedback from JIVE the hardware
problem was fixed after the first experiment (EB023A).
 During the May/June session two experiments (EB024E and EB024F) were 
failures due to problems with updating last minute schedule versions.
During the last but one experiment scheduled for Tr in this session
(EN001) our maser lost lock. Therefore we did not observe also in 
the last experiment (EM049).
 In Spring 2003 Tr has received 4 BBC on loan from Onsala. As a result
there weren't serious problems with these devices during May/June
session, which used to be the case over last few years.


Logistics Problems Encountered Since Last TOG Meeting
-----------------------------------------------------
No problems in this category.


Technical Problems Encountered Since Last TOG Meeting
-----------------------------------------------------

As mentined above, now we have troubles with the H-maser, which
lost lock on June 8th after smooth working for about 9 years. About 
a week later the lock came back. Currently the problem is being 
diagnosed in cooperation with the manufacturer in Switzerland.


Changes/Upgrades Made to Hardware/Software
------------------------------------------
Now we have 4 spare BBCs borrowed from Onsala. Not all of
them in healthy condition but they allow us for keeping
the 8 ones in the rack working.

Current FS version is 9.6.2.


Any Other Comments
------------------

A holography project using a satellite beacon is going on since 
beginning of the year which aims at considerable improvement of 
the antenna surface required by higher frequency observations 
(30 GHz).

				            June 24, 2003

Kaz Borkowski

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QUESTIONNAIRE

Could the station VLBI friends please consult the EVN Status table
and provide any updates on the characteristics of their telescopes.
In particular colud they report any changes in the following points:


TABLE II

1) New receivers available:
None.

2) Changes or new measurements of the  SEFD (sytem noise in Jy):
Current Tr data:
|Wavel'th|  92 |  49 | 30 %| 21 #|  18 |  13*|   6 |   5 | 3.6*| 1.3 |0.7  cm|
|Tr      |     |     |2000 | 250=| 230=|     | 220 | 400 |     |     |       |
(only 6 and 5 cm SEFD changed).

3) Changes in polarization characteristics:
Unchanged.

4) Check and update the frequency range of each telescope at
   UHF band (30+ cm)  (Footnote % in Table II)
Change Tr entry in the footnote to:
(%)  UHF Band:  Tr 850-940 or 960-1100 MHz;


5) Check and update the frequency range at 21cm (Footnote # in Table II)
Change Tr entry in the footnote to:
(#)  21cm:  Tr 1350-1750 MHz

6) Plans to built new receivers?
22 GHz receiver is to be completed in 2004.


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)
30 s

8) Is the switching under schedule control ?
Yes, between 18 and 21 cm, and between 5 and 6 cm.

9) 18cm - 21cm Switching:
   Is this under schedule control ? Yes.
   How long does the change take ?  30 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, if about 15 minutes break allowed.
    Is the change under schedule control ?
No.
    Are changes in the schedule (SNAP) file required at the stations ?
No.

Any additional comments/info:
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