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information_for_astronomers:rx:s20mmnew
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information_for_astronomers:rx:s20mmnew [2024/08/01 08:23] akraus |
information_for_astronomers:rx:s20mmnew [2024/11/29 12:24] (current) akraus |
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| ====== 2cm double beam secondary focus receiver (12000-18000 MHz) ====== | ====== 2cm double beam secondary focus receiver (12000-18000 MHz) ====== | ||
| - | This receiver replaced the old 2cm secondary focus system. It is a two horn system for continuum, spectroscopy and VLBI observations. \\ | + | This receiver is a two horn system for continuum, spectroscopy and VLBI observations. \\ |
| Line 7: | Line 7: | ||
| ^ RX Name ^ [[information_for_astronomers:rx:bands|Band]] ^ Frequency range [GHz] ^ Polarisation^Nr. of Horns ^Horn position relativ to center of focus cabin^ | ^ RX Name ^ [[information_for_astronomers:rx:bands|Band]] ^ Frequency range [GHz] ^ Polarisation^Nr. of Horns ^Horn position relativ to center of focus cabin^ | ||
| - | | **S14mm** | K | 18.0-26.0 | dual-circular| 2 | Horn 1: Az: -525 arcsec, Elv: 63 arcsec,\\ Horn 2: Az: -762 arcsec, Elv: 63 arcsec| | + | | **S20mm** | K | 12.0-18.0 | dual-circular| 2 | Horn 1: Az: -525 arcsec, Elv: 63 arcsec,\\ Horn 2: Az: -762 arcsec, Elv: 63 arcsec| |
| ==== Calibration Information ==== | ==== Calibration Information ==== | ||
| Line 19: | Line 19: | ||
| ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ||
| - | |A0 = 0.97099 |A1 = 1.8327E-3 |A2 = -2.8674E-5 | (from old S20mm) | --- | | + | |A0 = 0.9818 |A1 = 1.179E-3 |A2 = -1.906E-5 | Dec 2022 | --- | |
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| * Note that the system temperature at this frequency depends on weather conditions! | * Note that the system temperature at this frequency depends on weather conditions! | ||
| * For technical reasons, no spectroscopic frequency-switch observations are possible! | * For technical reasons, no spectroscopic frequency-switch observations are possible! | ||
| + | * Below 13 GHz, there is strong interference due to communication with satellites. | ||
| ==== Available receiver versions (for OBSINP) ==== | ==== Available receiver versions (for OBSINP) ==== | ||
information_for_astronomers/rx/s20mmnew.1722493398.txt.gz · Last modified: 2024/08/01 08:23 by akraus
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