System performance (old data)

This page holds the archived system performance data (the current data is on the system performance page)

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327 receiver (other 327 calibration info)  (top)

• 01sep02 thru 01feb03 (room temp amps to - reshimming of elevation rails)
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.
• 01sep01 thru 30jul02 (cooled receiver to - room temp amps installed)
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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430 dome receiver ()  (top)

• 01nov01 thru 01feb03 (start of data to - shimming of elevation rails)
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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430 ch receiver ()  (top)

• 01feb05 thru lastModDate
• Gain,Tsys,Sefd...(.ps) (.pdf)
• Coma,sidelobes, beam efficiency (.ps) (.pdf)
• Pointing errors (.ps) (.pdf)    (note: az positions are encoder values. physical position of dome).
• Az,za coverage (.pdf) (.pdf)
• Hour of day when sources measured (.ps) (.pdf)
• list of sources with dates and filenames

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610 receiver (other 610 calibration info)  (top)

• 01mar03 thru jul05 (reshimming of elevation rails to jul05)
• Gain,Tsys,Sefd...(.ps) (.pdf)
• Coma,sidelobes, beam efficiency (.ps) (.pdf)
• Pointing errors (.ps). (.pdf)
• Az,za coverage (.ps) (.pdf)
• Hour of day when sources measured (.ps) (.pdf)
• list of sources with dates and filenames

• 30aug02 thru 01feb03 (insalled skinny dipole to - reshimming elevation rails)
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.
• 23may01 thru 29aug02 (installed fat dipole to - installed skinny dipole)
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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800 (other 800 calibration info)  (top)

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lband narrow (other lband narrow calibration info)  (top)

• 01mar03 thru Dec03 (reshimming of elevation rails to rcvr removed).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.
• 21aug02 thru 01feb03 (horn focus change to reshimming of elevation rails, pointing model).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.
• 01sep01 thru 20aug02 (reflector adjustment finished  to horn focus change).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.  (B0824+294 had wrong coord. in catalog)
• Az,za coverage
• Hour of day when sources measured.
• More Info

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lband wide  (other lband wide calibration info)  (top)

• 21nov02 thru 01feb03 (horn focus change to - reshimming of elevation rails, pointing model).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.
• 01sep01 thru 20nov02 (reflector adjustment finished  to - horn focus change).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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alfa (lband feed array) (other alfa calibration info)  (top)

• 21aug04
• Tsys . data taken from cal on/offs 21/22aug04. PolA top, Polb bottom. 100 Mhz bands using cal value at center for entire band. Pixels/polA,polB may have still be mixed up. Cal values are those measured in the lab. processing: x101/mbeam/tsys/dotsys.pro

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sband narrow  (other sbn calibration info)  (top)

• 01sep01 thru 01feb03 (reflector adjustment finished  to reshimming of elevation rails).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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sband wide  (other sbw calibration info)  (top)

• 03mar01 to 17feb04(reshimming of elevation rails to - diodes replaced).
• Gain,Tsys,Sefd...  (the cal values are wrong so Tsys, gain is way off.
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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sband high (3-4 Ghz)  (other sbh calibration info)  (top)

• 03mar01 thru 13feb04 (reshimming of elevation rails to - horn lowered .8 inches for focus).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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cband  4 to 6 Ghz  (other cband calibration info)  (top)

• 01apr03 thru 24may05 ( reshimming of elevation rails, pointing model to new amps installed).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.  (after model 15 installed 20may04)
• Az,za coverage
• Hour of day when sources measured.
• 28aug02 thru 01feb03 (horn focus change to reshimming of elevation rails, pointing model).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.
• 01sep01 thru 27aug02 (reflector adjustment finished  to horn focus change).
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.

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cband hi 6 to 8 Ghz (other cbhi calibration info)  (top)

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xband 8.2 to 10 Ghz. (other xband calibration info)  (top)

• 04sep03  thru Feb04. (new xband horn to new cal diodes.)
• Gain,Tsys,Sefd..(.ps)

Note: 05oct03 cals remeasured on the antTestRange.
• Coma,sidelobes, beam efficiency (.ps) (.pdf)
• Pointing errors (.ps). (.pdf)

    B2209+08,B2128+048?  taken with encoder jump of +16.6 asecs.
• Az,za coverage (.ps) (.pdf)
• Hour of day when sources measured.
 
• mar03 thru 03sep03 After rail shimming to new horn installed.
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.
• 3C48 (B0134+329) was measured from 10:30 to 12:00 with temperatures gt 80F. The za pointing did not duplicate the other northern sources. A platform height change would create a za only error.
• apr02 to 01feb03.  New turret position to rail shiming.
• Gain,Tsys,Sefd...
• Coma,sidelobes, beam efficiency
• Pointing errors.
• Az,za coverage
• Hour of day when sources measured.