VLBI project GM060 was observed at C-band
with the GBT.  There were many problems.

Summary:
(Feb 17, 2006)
1200 - 1234 UT  Problem with 5 MHz reference
1307 - 1340 UT  Astrid hangup -- tracking J2106+213
1340 - 1640 UT Antenna parked due to high winds.
1845 - 1931 UT  Astrid hangup -- tracking J2106+213

Some problem happened at the start of the run that seems to have been
a momentary drop-out of the 5 MHz reference.
Data from 1234 to 1340 UT are probably good, but the
clock correction is large (about 9.28 ms !) but I believe the
GPS data in the log file is correct.

During the down time for high winds (1340-1640) we
reset the timing module, so that after 1640 the clock
correction is normal (about -900 ns).

There were two occasions on which Astrid (the scripting
language) hung up.  This is a problem with a new
software release and should be fixed soon.
Because of this, the source J2106+213 was being
tracked continuously during the times
1307-1340 UT and 1845-1931 UT,
instead of switching back and forth between
two sources.

TSYS about 20-25 K.
Phase cal levels looked good --  2.5 to 3 percent.

Tapes HST00310, HST00122, and SVLB0200
will be shipped to JIVE on Tuesday Feb 21.

-- frank