seasonder_DopplerFreq2NormalizedDopplerFreq: Convert Doppler Frequencies to Normalized Doppler Frequencies

In SeaSondeR: Radial Metrics from SeaSonde HF-Radar Data

Convert Doppler Frequencies to Normalized Doppler Frequencies

Description

This function converts Doppler frequencies (in Hz) into their corresponding normalized Doppler frequencies within a SeaSondeR object.

Usage

seasonder_DopplerFreq2NormalizedDopplerFreq(
  seasonder_cs_object,
  doppler_values
)

Arguments

seasonder_cs_object	A SeaSondeR cross-spectral object containing metadata about the Doppler bins.
doppler_values	A numeric vector specifying the Doppler frequencies (in Hz) to be converted into normalized Doppler frequencies.

Details

The function follows these steps:

1. Calls seasonder_DopplerFreq2Bins to convert the input Doppler frequencies into Doppler bin indices.

2. Calls seasonder_Bins2NormalizedDopplerFreq to obtain the corresponding normalized Doppler frequencies.

The normalized Doppler frequency is computed as:

f_{doppler} = f_{norm} \times f_{bragg}

where:

• f_{doppler} is the Doppler frequency in Hz,

• f_{norm} is the normalized Doppler frequency,

• f_{bragg} is the Bragg frequency, computed based on radar wavelength.

This function ensures consistency by mapping input frequencies to their closest bin representation before normalization.

Value

A numeric vector of normalized Doppler frequencies corresponding to the input Doppler values.

See Also

seasonder_DopplerFreq2Bins for converting Doppler frequencies to bin indices. seasonder_Bins2NormalizedDopplerFreq for converting bin indices to normalized frequencies.

SeaSondeR documentation built on June 8, 2025, 10:50 a.m.