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information_for_astronomers:rx:s14mm
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information_for_astronomers:rx:s14mm [2014/10/01 10:54] bwinkel [Tcal measurements] |
information_for_astronomers:rx:s14mm [2024/07/10 16:23] (current) akraus |
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| - | ====== 1.3cm double beam secondary focus receiver (18000-26000 MHz) ====== | + | ====== 1.3cm double beam secondary focus receiver (18000-26000 MHz) ====== |
| - | ** The receiver will be installed soon into the telescope. It is not yet available! ** | + | This is a two horn system especially for continuum, spectroscopy and VLBI observations. |
| - | This is a two horn system for continuum, spectroscopy and VLBI observations. The system is currently tested and all values are preliminary. \\ | + | ==== Overview ==== |
| + | |||
| + | ^ 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: -95.6 arcsec, Elv: 734.2 arcsec,\\ Horn 2: Az: 95.6 arcsec, Elv: 734.2 arcsec| | ||
| ==== Calibration Information ==== | ==== Calibration Information ==== | ||
| ^ Frequency [GHz] ^ Channel ^ 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] ^ Channel ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | ||
| - | | 19.0 | 1 | LCP | 49 | 39 | 1.05 | 37 | 37 | 1.56 | 67 | 41.9 | Jan 2014 | | + | | 19.25 | 1/2 | LCP/RCP | 13.1 | 47 | 1.09 | 43 | 38 | 1.56 | 67 | 40.4 | Jul 2024 | |
| - | | 21.0 | 1 | LCP | 37 | 51 | 1.07 | 48 | 38 | 1.74 | 61 | 39.5 | Jan 2014 | | + | | 21.15 | 1/2 | LCP/RCP | 9.2 | 67 | 1.05 | 64 | 37 | 1.74 | 61 | 37.8 | Jul 2024 | |
| - | | 23.0 | 1 | LCP | 9.5 | 58 | 1.12 | 52 | 39 | 1.41 | 79 | 37.6 | Jan 2014 | | + | | 22.85 | 1/2 | LCP/RCP | 9.0 | 74 | 1.03 | 72 | 36 | 1.41 | 79 | 36.8 | Jul 2024 | |
| - | | 25.0 | 1 | LCP | 8.0 | 59 | 1.12 | 53 | 39 | 1.57 | 71 | 35.6 | Jan 2014 | | + | | 24.75 | 1/2 | LCP/RCP | 8.0 | 72 | 1.01 | 71 | 36 | 1.57 | 71 | 34.5 | Jul 2024 | |
| + | | 22.25 | 1/2 | LCP/RCP | 8.4 | 72 | 1.05 | 71 | 36 | 1.57 | 71 | 36.8 | Jul 2024 | | ||
| + | | 23.77 | 1/2 | LCP/RCP | 8.0 | 72 | 1.03 | 71 | 36 | 1.57 | 71 | 35.2 | Jul 2024 | | ||
| ^ 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 = 0.955 |A1 = 3.1E-3 |A2 = -5.3E-5 | Jan 2014 | Jan 2014 | | + | |A0 = 0.981 |A1 = 1.08E-3 |A2 = -1.52E-5 | Jul 2024 | Jul 2024 | |
| **Comments:** | **Comments:** | ||
| * Note that the system temperature at this frequency depends strongly on weather conditions! | * Note that the system temperature at this frequency depends strongly on weather conditions! | ||
| - | * Zenith tau values can range from 0.05 to 0.2. | + | * Zenith tau values can range from 0.05 to more than 0.2. |
| + | |||
| + | The receiver delivers the data by default in four 2.5GHz-wide IF-subbands: | ||
| + | ^Band^Frequency Range^ | ||
| + | |4|18.0-20.5 GHz| | ||
| + | |3|19.9-22.4 GHz| | ||
| + | |2|21.6-24.1 GHz| | ||
| + | |1|23.5-26.0 GHz| | ||
| + | |||
| + | Additionally, there are several receiver versions (see below) which | ||
| + | allow to observe two 300 MHz-wide bands, e.g. for 22.25 GHz (i.e., the | ||
| + | water line) and 23.77 GHz (NH3 (1,1)-(3,3)). | ||
| + | |||
| + | ==== Available receiver versions (for OBSINP) ==== | ||
| + | |||
| + | ^Version^Description^Details^ | ||
| + | |dualpix_dualpol_cont_OPTOCBE|standard continuum backend with 4 basebands| 4x 2.5 GHz| | ||
| + | |dualpix_dualpol_hires_h2o_nh3 |spectroscopic mode with two basebands, centered at 22.25 and 23.77 GHz | bandwidth is 300 MHz per baseband| | ||
| + | |||
| + | |||
| + | **Below here: Information is currently updated.** | ||
| - | ==== Version description for OBSINP ==== | + | ==== Receiver Bands ==== |
| - | ^ RX Name ^ Wavelength [cm] ^ Frequency (center) [GHz] ^ Nr. of Horns ^ | ||
| - | | **S13mm Double Beam RX ** | 1.3 | 18.0-26.0 (22.0) | 2 | | ||
| - | | **Version:** | **Comment** ||| | ||
| - | |1. Continuum (BW: 2 GHz) | Broad Band Continuum ||| | ||
| - | | **Horn offsets** [arcsec]| Horn 1:-95.6,734.2; 2: 95.6,734.2 ||| | ||
| Line 102: | Line 122: | ||
| ==== Tcal measurements ==== | ==== Tcal measurements ==== | ||
| + | === February 2019 === | ||
| + | == Tcal and Tsys == | ||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tcal_from_specpointing_using_tau_spec.png?365 |}} | ||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tsys0_from_specpointing_using_tau_spec.png?365 |}} | ||
| + | == Opacity and Tebb (WVR+AATM) == | ||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tau_from_specpointing_using_tau_spec.png?365 |}} | ||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tebb_from_specpointing_using_tau_spec.png?365 |}} | ||
| + | |||
| + | == T0 == | ||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_t0_from_specpointing_using_tau_spec.png?365 |}} | ||
| + | |||
| === April 2014 === | === April 2014 === | ||
| - | Note, that in April the Tcal was changed in the receiver. | + | Note, that in April the Tcal was changed in the receiver. Gaps in the curves are entirely due to measurement uncertainties. T0 and Tsys were deduced from spectroscopic skydip measurements and are subject to fitting errors caused by the low signal-to-noise ratio in the spectral bins. |
| == Tcal and Tsys == | == Tcal and Tsys == | ||
| - | {{:rechner-gruppe:recevier:s14mm_apr23_3c147_tcal_from_specpointing_using_tau_spec.png?365 |}} | + | {{:information_for_astronomers:rx:s14mm_apr23_3c147_tcal_from_specpointing_using_tau_spec.png?365 |}} |
| - | {{:rechner-gruppe:recevier:s14mm_apr23_3c147_tsys0_from_specpointing_using_tau_spec.png?365 |}} | + | {{:information_for_astronomers:rx:s14mm_apr23_3c147_tsys0_from_specpointing_using_tau_spec.png?365 |}} |
| == Opacity and T0 == | == Opacity and T0 == | ||
| - | {{:rechner-gruppe:recevier:s14mm_apr23_3c147_tau_from_specpointing_using_tau_spec.png?365 |}} | + | {{:information_for_astronomers:rx:s14mm_apr23_3c147_tau_from_specpointing_using_tau_spec.png?365 |}} |
| - | {{:rechner-gruppe:recevier:s14mm_apr23_3c147_t0_from_specpointing_using_tau_spec.png?365 |}}\\ | + | {{:information_for_astronomers:rx:s14mm_apr23_3c147_t0_from_specpointing_using_tau_spec.png?365 |}} |
| - | (Gaps in the curves are entirely due to measurement uncertainties. T0 and Tsys were deduced from spectroscopic skydip measurements and are subject to fitting errors caused by the low signal-to-noise ratio in the spectral bins.) | ||
| === Januar 2014 === | === Januar 2014 === | ||
| == Tcal and Tsys == | == Tcal and Tsys == | ||
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_tcal_from_specpointing_using_tau_spec.png?365 |}} | + | |
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_tsys0_from_specpointing_using_tau_spec.png?365 |}} | + | {{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_tcal_from_specpointing_using_tau_spec.png?365 |}} |
| + | {{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_tsys0_from_specpointing_using_tau_spec.png?365 |}} | ||
| == Opacity and T0 == | == Opacity and T0 == | ||
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_tau_from_specpointing_using_tau_spec.png?365 |}} | + | {{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_tau_from_specpointing_using_tau_spec.png?365 |}} |
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_t0_from_specpointing_using_tau_spec.png?365 |}} | + | {{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_t0_from_specpointing_using_tau_spec.png?365 |}} |
| == Antenna model == | == Antenna model == | ||
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_taper_from_specpointing.png?365 |}} | + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_taper_from_specpointing.png?365 |}} |
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_hpbw_from_specpointing.png?365 |}} | + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_hpbw_from_specpointing.png?365 |}} |
| + | |||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_gamma_from_specpointing.png?365 |}} | ||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_gammamb_from_specpointing.png?365 |}} | ||
| + | |||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_eta_from_specpointing.png?365 |}} | ||
| + | {{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_etamb_from_specpointing.png?365 |}} | ||
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_gamma_from_specpointing.png?365 |}} | ||
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_gammamb_from_specpointing.png?365 |}} | ||
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_eta_from_specpointing.png?365 |}} | ||
| - | {{:rechner-gruppe:recevier:s14mm_jan14_ngc7027b_etamb_from_specpointing.png?365 |}} | ||
information_for_astronomers/rx/s14mm.1412153657.txt.gz · Last modified: 2014/10/01 10:54 by bwinkel
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