This function calculates the Doppler bin indices corresponding to the first-order Bragg frequencies (-1 and 1) for a SeaSonde Cross Spectra (CS) object.
Arguments
- seasonder_cs_object
A SeaSonde Cross Spectra (CS) object created by
seasonder_createSeaSondeRCS(). This object contains the metadata required for the computation, including the normalized Doppler frequencies and their mapping to Doppler bins.
Value
A numeric vector of length 2, where:
The first value is the Doppler bin corresponding to the -1 Bragg frequency.
The second value is the Doppler bin corresponding to the 1 Bragg frequency.
Details
This function uses the normalized Doppler frequencies for the first-order Bragg peaks
(\(-1\) and \(1\)) and maps them to their corresponding Doppler bin indices.
The mapping is performed using the helper function seasonder_NormalizedDopplerFreq2Bins(),
which converts normalized frequencies to bin indices based on the spectral resolution
and the Doppler range of the radar system.
The bins are critical for identifying the Doppler shifts associated with the first-order Bragg scattering in HF radar systems, which correspond to surface waves with wavelengths half that of the transmitted radar signal.
See also
seasonder_NormalizedDopplerFreq2Bins for the frequency-to-bin mapping logic.