The Calibration Files
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The Calibration Files |
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The calibration files are text file with the .rxg extension and are computer generated after the calibration operations.
For each receiver they contains mainly the FWHM, the gain curves and the calibration temperature as function of the frequency. The calibration temperature is given for fixed frequency values, in order to cover the whole receiver band. The calibration values for unlisted frequencies must be interpolated from the nearest values.
The following table shows how to read the data :
| Line | Label | Description |
| 1 | Receiver name | |
| 2 | Fixed | LO values (MHz) |
| Range | LO range of values (MHz) | |
| 3 | Creation date (yyyy/mm/dd) | |
| 4 | Constant | FWHM (rad) |
| Frequency | FWHM constant (FWHM = 1.22 ∙ value ∙λ/D [rad]) | |
| 5 | Available polarizations | |
| 6 | Maximum gain (DPFU) for each polarization as listed above (K/Jy) | |
| 7 | Elev Poly | G(el) Normalized gain curve's polynomial coefficient (increasing powers) |
| Altaz | G(z) Normalized gain curve's polynomial coefficient (increasing powers) | |
| 8 and following | Polarization, Frequency (MHz), Calibration temperature (K) | |
| end_tcal_table | ||
D = diameter of the antenna
DPFU = Degrees Per Flux Unit
el = elevation
z = zenith distance
The KKC (22 GHz) file contains also the receiver noise temperature and the spillover temperature at various elevations :
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Noise temperature (K) |
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Elevation (°), Spillover temperature (K) |
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| end_spillover_table | ||
