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C-Band
Basic Information

Calibration & Beam Parameters

RFI Situation

Recent Events

Receiver History

Contact Info

 

 

 

1. Basic Information:

 

Frequency Range (GHz): 3.95 - 6.05 GHz*

Name and Number:

C-Band (cb, 9)
Measured Sensitivity (K/Jy): 7.0 - 9.0 (4.5 GHz)
6.0 - 8.5 (5.0 GHz)
5.5 - 8.0 (5.4 GHz)
   5.0 - 7.5 (5.9 GHz)**
Measured System Temp (K): 25 - 31 (4.5 GHz)
25 - 30 (5.0 GHz)
27 - 32 (5.4 GHz)
   26 - 31 (5.9 GHz)**
Native Polarization: Dual Linear
Beam Size (at 5 GHz): 54 x 60 arcsec

*Although the bandpass of this receiver is over 2 GHz wide, currently only a 1-GHz wide chunk can be brought to the Control Room for processing at any given time.

**See calibration info below for a more accurate description of the telescope parameters! Note that these values depend upon the accuracy of the noise-diode calibration in estimating the system temperature and K/Jy. As well as both sensitivity and Trx being functions of zenith angle, the telescope sensitivity will also, at some level, be a function of azimuth. See calibration info below for a more accurate description of the telescope parameters!


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2. Calibration & Beam Parameters:


Gain and Tsys Cal Values Beam Maps Polarization Misc. Info


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3. RFI situation:

As yet, C-band suffers relatively little from Radio Frequency Interference (RFI). Daily RFI monitoring plots for the past several years from the Observatory "hill-top" monitoring system can be found in binders in either the telescope Control Room or by asking the Arecibo Spectrum Manager.
  • For the current daily average C-Band RFI plot from the Arecibo "hill-top" monitoring system, click here .

  • For the current frequency v time C-band RFI plot from the Arecibo "hill-top" monitoring system, click here .

  • For the current frequency v time C-band RFI plot (with band-pass correction) from the Arecibo "hill-top" monitoring system, click here .

  • For the current daily rms/mean v frequency C-band RFI plot from the Arecibo "hill-top" monitoring system, click here .

The occurrence of RFI versus frequency by month and year since Jan 2001 can be found via the C-Band link on this web page.

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4. Recent Events:

    For the most recent history of the C-Band receiver, click here.

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5. Receiver History:

For a full history of the C-Band receiver, click here.

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6. Contact Info:

For further information on this receiver, please contact Chris Salter at
csalter (append @naic.edu)

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