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Дата изменения: Sat May 7 21:12:20 2011
Дата индексирования: Tue Oct 2 07:59:01 2012
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Gain curves.
Mar04
Gain
curve
description, location, and code to evaluate the curves.
Plots
of gain curves with all frequencies plotted together.
Gain curves by receiver:
327 receiver
430 dome.
430 ch
lband wide
lband narrow (removed)
sband narrow
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)
-
Data
taken Mar03 thru sep03 Installed 02nov03. Valid from 01mar03.
This is after the new horn was installed.
- Data
taken nov02 thru dec02. Installed dec02??. Valid 22nov02 thru
17feb03.
This was from the horn focus move till the new receiver was installed.
- Data
taken sep01
thru 20nov02
Installed dec02 ??. Valid 01sep01 thru 21nov02.
This is from the start of the calibration runs till the horn was moved
to correct for the phase error.
Lband narrow (no longer
installed).
(top)
-
Data
taken 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)
-
Data
taken 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.
-
Data
taken 15may03 thru sep03. Installed 10mar04. Valid from 01mar03 to
12feb04The cal values were drifting during this time period.
Cband (4-6 ghz). (top)
-
Data
taken 25may05 thru 31oct05. Installed 22nov05. Valid
from
25may05. New amps were installed in the dewar on 25may05. The curves
were
measured at 9 frequencies.
-
Data
taken 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.
- Data
taken Aug02 thru Dec02 fit . Installed dec02 ??. Valid 28aug02 to
04may03.
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 5400 Mhz.
- Data
taken 01sep01 thru 27aug02. Installed sep02 ??. Valid 01sep01 thru
27aug02.
This data was from the start of the calibration scans until the horn
focus was changed.
Cband hi (6-8 ghz). (top)
-
Data
taken feb04. Valid 14feb04 onward.
The receiver was installed in feb 04. Data was taken at 4 freq:
6600,6900,7200,7400
Mhz.
Xband (8-10 ghz). (top)
-
Data
taken 05oct03 thru 25jan04. Installed 25jan04. Valid 05oct03
onward.
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.
- Data
taken 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).
processing: x101/calmrcvr/gaincurves.pro
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