General Q and K Band Issues:
- 12feb03 -- 23 new K-band and 26 Q-band receivers are now
available.
- 31oct02 -- 22 new K-band and 26 Q-band receivers are now
available.
- 28aug02 -- Current results on
the leakage repairs.
- 06aug02 -- The leakage repairs on the new receivers appears
to have worked so far, even though we are not through the wet
season yet.
- 25july02 -- Since the leakage repairs started, there have
been a few problems with Tcals, resulting in too high values of
Tsys for a few antennas. Therefore, be aware that the system
temperature shown in the plots below for K-bands are not true
ones. This problem has now been fixed.
- 28may02 -- 20 new K-band and 25 Q-band receivers are now
available.
- 20jan02 -- 18 new K-band and 25 Q-band receivers are now
available.
- 20jan02 -- The new K-band feed horns still suffer from water
during wet weather. Leakage tests have been performed, and the
plan is to install o-rings in all sections plus add sealant in
all new K-band receivers during the spring.
- General issues
history file.
Frequency Usage:
- Frequency Usage Summary at Q band for 1996 - 1999
ps file,
gif
- Frequency Usage Summary at K band for 1996 - 1999
ps file,
gif
Receiver performance (measured To):
To is the system temperature due to all sources except the
atmosphere (atm has been subtracted using tipping scan data). It
includes receiver temp, sidelobes, etc. Subtract about 10 K obtain
an estimate of the actual receiver temperature.
These charts are available as postscript or gif images. Note:
some of the postscript files are quite large (40m+) and will take
even a good connection a while to download.
|
Q-Band
|
| ANT |
2005 |
2004 |
2003 |
2002 |
2001 |
2000 |
ANT |
1999 |
| 1-4 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
3,4,6,8 |
ps,
jpeg |
| 5-8 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
11,12,13,14 |
ps,
jpeg |
| 9-12 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
16,18,19,20 |
ps,
jpeg |
| 13-16 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
21,22,25,27 |
ps,
jpeg |
| 17-20 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
| 21-24 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
| 25-28 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
|
K-Band
|
| ANT |
2005 |
2004 |
2003 |
2002 |
2001 |
2000 |
1999 |
| 1-4 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
jpeg |
| 5-8 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
jpeg |
| 9-12 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
jpeg |
| 13-16 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
jpeg |
| 17-20 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
jpeg |
| 21-24 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
jpeg |
| 25-28 |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
gif |
ps,
jpeg |
NB: Tsys shown in the 2002 and onward plots are not to be taken as
absolute Tsys values due to some Tcal problems during the
spring. Fixed as of July 25 2002.
|
