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information_for_astronomers:rx:s7mm_db
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information_for_astronomers:rx:s7mm_db [2018/09/13 14:02] ubach [Calibration Information] |
information_for_astronomers:rx:s7mm_db [2021/06/27 20:46] akraus |
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| ====== 7mm secondary focus receiver (33500-50000 MHz) ====== | ====== 7mm secondary focus receiver (33500-50000 MHz) ====== | ||
| - | This is a 4-channel two horn system for continuum, spectroscopy and VLBI observations. This is a new receiver currently in commissioning and was installed in March 2018. More details will follow.\\ | + | This is a 4-channel two horn system for continuum, spectroscopy and VLBI observations.\\ |
| + | Attention: When frequencies lower than 35 GHz are selected, the receiver operates in | ||
| + | double sideband mode for some parts of the observed bandpass. Please contact staff for | ||
| + | advice. | ||
| ==== Calibration Information ==== | ==== Calibration Information ==== | ||
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| |42.75 |A |LCP |9.5 |84 |0.76 |110 |26 |1.5 |50 |20.9 |May 2018 | | |42.75 |A |LCP |9.5 |84 |0.76 |110 |26 |1.5 |50 |20.9 |May 2018 | | ||
| |42.75 |B |RCP |8.7 |85 |0.77 |111 |27 |1.5 |50 |21.1 |May 2018 | | |42.75 |B |RCP |8.7 |85 |0.77 |111 |27 |1.5 |50 |21.1 |May 2018 | | ||
| + | |44.1 (narrow band)|A+B |LCP+RCP |13 |100 |0.66 |140 |23 |1.67 |40 |19.5 |Dec 2019| | ||
| |45.25 |A |LCP |8.5 |99 |0.63 |156 |22 |1.5 |42 |19.7 |May 2018 | | |45.25 |A |LCP |8.5 |99 |0.63 |156 |22 |1.5 |42 |19.7 |May 2018 | | ||
| |45.25 |B |RCP |8.2 |103 |0.65 |159 |22 |1.5 |47 |19.8 |May 2018 | | |45.25 |B |RCP |8.2 |103 |0.65 |159 |22 |1.5 |47 |19.8 |May 2018 | | ||
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| **Comments:** | **Comments:** | ||
| + | * **Please note, that Tsys and SEFD are given for zenith. For sensitivity calculations, please take the atmosphere's opacity into account!** | ||
| * The new gain curves were corrected for opacity. | * The new gain curves were corrected for opacity. | ||
| * Opacity correction was done with a zenith opacity of 0.06-0.08. Typical zenith opacities under good weather conditions are around 0.07 to 0.1 at 42 GHz. | * Opacity correction was done with a zenith opacity of 0.06-0.08. Typical zenith opacities under good weather conditions are around 0.07 to 0.1 at 42 GHz. | ||
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| - | ^ 7mm SFK dual horn receiver ^^^^ | + | ^ 7mm SFK dual horn receiver ^^^^ Centre Frequency at version ^^^ |
| - | ^ Channel ^ IF ^ Pol. ^ Comment ^ | + | ^ Channel ^ IF ^ Pol. ^ Comment ^ 37.5 GHz_Continuum ^ 42.5 GHz_Continuum^ 47.5 GHz_Continuum^ |
| - | | 1 | 2.5 GHz | LCP | TP A, horn 1 | | + | | 1 | 2.5 GHz | LCP | TP A, horn 1 | 36.25 GHz | 41.25 GHz | 46.25 GHz | |
| - | | 2 | 2.5 GHz | RCP | TP B, horn 1 | | + | | 2 | 2.5 GHz | RCP | TP B, horn 1 | 36.25 GHz | 41.25 GHz | 46.25 GHz | |
| - | | 3 | 2.5 GHz | LCP | TP A, horn 2 | | + | | 3 | 2.5 GHz | LCP | TP A, horn 2 | 38.75 GHz | 43.75 GHz | 48.75 GHz | |
| - | | 4 | 2.5 GHz | RCP | TP B, horn 2 | | + | | 4 | 2.5 GHz | RCP | TP B, horn 2 | 38.75 GHz | 43.75 GHz | 48.75 GHz | |
| ==== Spectroscopy modes and resolution ==== | ==== Spectroscopy modes and resolution ==== | ||
information_for_astronomers/rx/s7mm_db.txt · Last modified: 2023/03/21 14:24 by akraus
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