Report of the CP2/CP6 at Tromso, 23-27 March 1998.

M. Rietveld was co-ordinator.
The CP2 and CP6 experiments were both started on time at 1000UT on 23 March 1998.
Conditions were quiet. The Tromso antenna did not start moving until 10:06 UT
since it was not enabled.

CP6:  Antenna vertical, 2 klystrons feeding whole antenna. AllX from whole antenna.
A correlator error on VHF, after a crowbar at 22:06 UT on 26 March was not
noticed and corrected until 23:30 UT.
The data was integrated "manually" from the disk sets since INTSP did
not function and time was not spent debugging it. The Tx power was calculated
from the sum of the A and B klystrons in the integration program.

CP-2: The ND integration/analysis was performed in real time, the latter
using alt-anal.

On 24 March at 13:51 UT Birger noticed that Lo2, ch 3 was wrong by several
MHz. It appeared faulty and was replaced by a lab synthesizer (Hewlett Packard
set to 150.0 MHz, 6dBm and locked to external 10MHz reference.)
I had not checked the LO2 frequencies so this LO may well have been faulty
from the start of the experiment. 
The colour plot of the long-pulse density data shows a discontinuous increase
at about 1350 UT. Comparison with fof2 will have to be done to see if the
fault was there from the beginning.
As a result of this (and previous instances of LO2 failing) the operators
will now do a PRINT-RECEIVER and and DISPLAY-ALL-LO2 and see if they agree
whenever they write the UHF transmitter log. There is a special entry in the
log now to indicate that the check was done.

General:
==========
The SPARC transfer was reliable throughout the experiment but there
were data gaps in it caused by human error. The first occurred when
the data were copied to EXABYTE using sd during the experiment. This
has the effect, when certain options are not used, that the data and the
directory are removed so that no more data can be transferred to that
directory.
The second gap occurred when the system manager inadvertently removed
all the x permissions from all the directories in /data. This also means
that no data could be transferred. Thankfully the data could be ddrawed
from ND data tapes.

I think the data saving procedures (particularly the use of sd) need
revision/improvement. Data should not be automatically removed from
disk unless necessary. Only one tape copy of the data exists at the
time the data are removed and this is not too secure.

A GUISDAP data analysis was also done of CP-2, but the first pass has
a data gap due to missing SPARC data at that time. The data gap was later
recovered from a ddrawed ND data tape, but the analysis has not been
re-done.

The NCAR-format data were saved to 6250 bpi Tapes, including the 
CP-2 velocity data. The remote site data were not analysed or handled by me.

An attempt was made at "ddncar"-ing the data but it is not clear which version
of ddraw works correctly. The one I tried (ddncar3 from HQ's machine) creates
a new subdirectory for each file it writes. 

Colour (postscript) plots were made, and the postcript files are
available on the web.

Michael Rietveld   (15 April 1998)