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: http://www.naic.edu/~astro/RXstatus/Sradar/Sradar.shtml
Дата изменения: Unknown Дата индексирования: Mon Feb 4 02:59:38 2013 Кодировка: Поисковые слова: п п п п п п п п |
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|
Frequency Range (GHz): | 2.24 - 2.34 or 2.33 - 2.43 |
Name and Number: |
sbn, 12 |
Measured Sensitivity (K/Jy): | 10* |
Measured System Temp (K): | 23, 25* |
Native Polarization: | Circular (can be changed to linear with sufficient advanced notice). The polarizer is a narrowband turnstile, and is only circular at 2380 MHz. At 2296, it is about 10% linear, but the polarizations are still quite orthogonal. |
Beam Size (at 2.38 GHz): | 130 arcsec |
Available Filters: |
The receiver has a switch selectable 0.1 GHz filter at ether 2.29 or 2.38 MHz. click here for a description. |
Warnings and Important Notes: | This receiver is expected to be replaced by the end of 2006. |
*See calibration info below for a more accurate description of the telescope parameters!
2.33-2.43 GHz or 2.24-2.34 GHz, switch slectable from a manual switch in the reciever room. It is normally left in the higher range, which is the band used by the Arecibo Planetary radar. If you expect to need to adjust it, contact us in advance to make sure that it's working.
2. Calibration & Beam Parameters:
Gain and Tsys | Cal Values | Beam Maps | Polarization | Misc. Info |
Misc. Info
To see an up-to-date plot of Tsys, just type tsys on your terminal after logging into Arecibo's computer network.
Very strong RFI outside of the window 2.35 to 2.40 GHz for the upper filter (2.33-2.43 MHz). The lower filter (2.24-2.34) is not well characterized.
The electronics department maintains a detailed Receiver log.
The turnstile polarizations were swapped on 2003 Oct 15, so that RCP (polarization A) is the colder one. The cables were also swapped, so there should be no visible change except the temperature and the cal values.
For further information on this receiver, please contact Michael Nolan at