Torun Station Report for TOG

Personnel Changes  - none.
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Brief Report of Last EVN Session
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The May/June (as well as February) session passed with 'minor 
failures'. As usually, all experiments that used 8 channels 
were affected by bad BBC7 and sometimes unstable BBC6. Additionally,
the 6cm receiver sensitivity was considerably lowered in LCP channel.
There were greater losses in the November 2001 session, however,
due to problems with recording after the upgrade to two headstacks
(lost all 5cm experiments and most of the other two wavelengths).

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

Technical Problems Encountered Since Last TOG Meeting
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The major problem concerned the upgraded recorder before
the November 2001 session. Details were already reported to 
the evntech forum. Briefly, there were communication problems
with the upgraded recorder and also worn off headstack (the old
one) did not write properly to the tape in reverse motion. 
Ultimately the headstack has been replaced by new one (Jan Buiter,
who came here from JIVE, made the job) and also the firmware has 
been modified and installed befor the February session. There
are still same issues probably related to the firmware.

Changes/Upgrades Made to Hardware/Software
------------------------------------------
We have now the two-headstack recorder. The use of the second 
headstack was successfully tested during February and May
sessions. We are reported from JIVE correlator that the quality 
of the recordings with this second headstack is poor.

The FS is being upgraded immediately whenever a new version 
appears (presently it is 9.5.11).

Pointing of the 32 m antenna was much improved thanks
of the effort of Greg to produce the best possible table
of corrections using 5 GHz receiver.

X-band receiver was developed and is extensively used
mainly in the spectral observations of the methanol line.
The efficiency of the antenna for X-band is equal to the theoretical
one, which gives us a hope to have good observing
system for 1.35 and 1 cm wavelengths.

Our old IF distribution module appeared to have too low isolation
between channels and now is replaced by new one with highly
improved isolation and better functionality.

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

There are still (for they last since about beginning of 2001) 
problems with reading of Torun VSOP tapes at Mitaka. The JIVE 
correlator can read our tapes, but the Mitaka copier cannot.

            September 24, 2002               EP, GH, KB