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information_for_astronomers:rx:s20mmnew
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information_for_astronomers:rx:s20mmnew [2020/07/15 14:17] bwinkel |
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. The system is currently tested and all values are preliminary. \\ | + | This receiver is a two horn system for continuum, spectroscopy and VLBI observations. \\ |
| - | **Note, that for technical reasons, no spectroscopic frequency-switch observations are possible!** | + | |
| + | |||
| + | ==== Overview ==== | ||
| + | |||
| + | ^ RX Name ^ [[information_for_astronomers:rx:bands|Band]] ^ Frequency range [GHz] ^ Polarisation^Nr. of Horns ^Horn position relativ to center of focus cabin^ | ||
| + | | **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 ==== | ||
| ^ Frequency [GHz] ^ Feed ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | ^ Frequency [GHz] ^ Feed ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | ||
| - | | 13.0 | 1 | LCP | 4.2 | 55 | 1.42 | 77 | 50 | 2.13 | 66 | 58.3 | Nov 2019 | | + | | 14.25 | 1 | LCP | 2.1 | 34 | 1.36 | 25 | 48 | 2.18 | 62 | 52.5 | Jun 2024 | |
| - | | 13.0 | 1 | RCP | 4.5 | 55 | 1.42 | 78 | 50 | 2.14 | 66 | 58.3 | Nov 2019 | | + | | 14.25 | 1 | RCP | 2.1 | 34 | 1.36 | 25 | 48 | 2.18 | 62 | 52.5 | Jun 2024 | |
| - | | 15.0 | 1 | LCP | 2.5 | 59 | 1.31 | 77 | 46 | 1.97 | 66 | 52.7 | Nov 2019 | | + | | 16.75 | 1 | LCP | 2.8 | 45 | 1.30 | 35 | 46 | 2.22 | 59 | 44.3 | Jun 2024 | |
| - | | 15.0 | 1 | RCP | 2.4 | 61 | 1.30 | 80 | 46 | 1.96 | 66 | 52.5 | Nov 2019 | | + | | 16.75 | 1 | RCP | 2.8 | 45 | 1.30 | 35 | 46 | 2.22 | 59 | 44.3 | Jun 2024 | |
| - | | 17.0 | 1 | LCP | 4.1 | 64 | 1.19 | 76 | 42 | 1.80 | 66 | 48.4 | Nov 2019 | | + | |
| - | | 17.0 | 1 | RCP | 4.5 | 65 | 1.17 | 76 | 41 | 1.79 | 66 | 48.6 | Nov 2019 | | + | |
| ^ 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 | --- | |
| **Comments:** | **Comments:** | ||
| - | * Note that the system temperature at this frequency depends strongly on weather conditions! | + | * Note that the system temperature at this frequency depends on weather conditions! |
| - | * Zenith tau values can range from ??? to ???. | + | * 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) ==== | ||
| + | |||
| + | ^Version^Description^Details^ | ||
| + | |continuum_5ghz|standard continuum backend with 2 basebands| 13.0-15.5 GHz & 15.5-18.0 GHz| | ||
| + | |cont_spec_5ghz|includes the WFFTS with 2x2x64k channels | 13.0-15.5 GHz & 15.5-18.0 GHz| | ||
| + | |||
| + | |||
| + | |||
| + | **Below here: Information is currently updated.** | ||
| ==== Version description for OBSINP ==== | ==== Version description for OBSINP ==== | ||
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| | **Version:** | **Comment** ||| | | **Version:** | **Comment** ||| | ||
| |1. Continuum (BW: 2 GHz) | Broad Band Continuum ||| | |1. Continuum (BW: 2 GHz) | Broad Band Continuum ||| | ||
| - | | **Horn offsets** [arcsec]| Horn 1:TBD; 2:TBD ||| | + | | **Horn offsets** (Azi, Elv, from center of SFK)| Horn 1: -525" ; 63" -- Horn 2: -762" ; 63" ||| |
| + | |relative offset of horn 2 from 1 (Azi, Elv)| -237" ; 0"||| | ||
information_for_astronomers/rx/s20mmnew.1594815459.txt.gz · Last modified: 2020/07/15 14:17 by bwinkel
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