location, and code to evaluate the curves.
gain curves with all frequencies plotted together.
Gain curves by receiver:
lband narrow (removed)
sband wide/low (1.8-3 ghz)
sband high (3-4 ghz)
cband (4-6 ghz)
cband high (6-8 ghz)
xband (8-10 ghz)
327 receiver (top)
430 dome. (top)
430 carriage house. (top)
Lband wide. (top)
Lband narrow (no longer
27aug02 thru sep02: This gain curve was made after the lbn
horn focus was moved on 27aug02. It was measured at 1300, 1375,
1415, and 1500 Mhz. It is a function of za only.
Sband narrow. (top)
Sband wide/low. (top)
Sband high (3-4 ghz). (top)
13feb04 thru jun04. installed 03jul04. Valid from 13feb05
to current date. The new cals were installed and the horn was
lowered .8 inches to put it in focus.
15may03 thru sep03. Installed 10mar04. Valid from 01mar03
to 12feb04The cal values were drifting during this time period.
Cband (4-6 ghz). (top)
25may05 thru 31oct05. Installed 22nov05. Valid
from 25may05. New amps were installed in the dewar on 25may05.
The curves were measured at 9 frequencies.
may03 thru Feb04. Installed 08mar04. Valid from 05may03.
This is after the new cals were installed and the cal cable was
tightened until the end of feb04. The curves were measured at 6
freq: 4500,4860, 5000, 5400, 5660, 5900 Mhz.
Aug02 thru Dec02 fit . Installed dec02 ??. Valid 28aug02
The cband gain curve was taken from data 28aug02 thru 30nov02.
This is after the horn focus was changed on 27aug01. The curve is
a function of az and za. It was measured at 4500, 4860, 5000, and
01sep01 thru 27aug02. Installed sep02 ??. Valid 01sep01
This data was from the start of the calibration scans until the
horn focus was changed.
Cband hi (6-8 ghz). (top)
feb04. Valid 14feb04 onward.
The receiver was installed in feb 04. Data was taken at 4 freq:
Xband (8-10 ghz). (top)
05oct03 thru 25jan04. Installed 25jan04. Valid
The new horn was installed on 05sep03. The receiver was then taken
to the ant test range where Trcv and Tcals were measured. It was
re-installed on the telescope in oct03. It was moved to a new
position on the rotary floor on 08jan04. Data was taken at
8500,8800,9000, and 9200 Mhz.
mar03 thru sep03. Installed 27mar04. Valid mar03
thru sep03 onward.
The elevation rail shimming and dome realignment finished in
mar03. Calibration data from mar03 thru sep03 was used to compute
gain curves. After sep03 the new horn was installed on the
receiver. Data was taken at 8500,8800,9000, and 9200 Mhz.
The plots were made using the idl routine gainget(az,za,freq,rcvNum,gainval).