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Absolute calibration of a wideband antenna and spectrometer for sky noise spectral index measurements
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Absolute calibration of a wideband antenna and spectrometer for sky noise spectral index measurements
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A new method of absolute calibration of sky noise temperature using a three-position switched spectrometer, measurements of antenna and low noise amplifier impedance with a vector network analyzer, and ancillary measurements of the amplifier noise waves is described. The details of the method and its application to accurate wideband measurements of the spectral index of the sky noise are described and compared with other methods.
Forward citations
Cited by 2 Pith papers
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Impact of numerical stability in Bayesian noise wave calibration on global 21-cm experiments
Near-collinearity of noise-source and load design-matrix columns makes REACH’s five-parameter Bayesian calibration non-reproducible; a four-parameter Chebyshev fit with hot-load T_NS(ν) recovery and spike masking stab...
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Global 21cm Measurement Calibration Methodology
Three-way Dicke switching is inadequate for broadband global 21cm work; five independent calibrators plus the classical four noise parameters yield the correct absolute temperature, and Rogers & Bowman (2012) missed |...
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