GFCRGas Filter Correlation Radiometer
GFCRGroup for Cryptology Research (India)
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The main principle of a GFCR is to use a sample of the gas of interest as a spectral filter for the gas.
In operation, it is often convenient to define an instrument signal from a GFCR as the ratio of the [S.
Since its invention, a number of practical realizations of GFCRs have been developed, including the original Selective Chopper radiometers (SCR), pressure modulator radiometers (PMR), and length modulated radiometers (Abel et al.