how to convert gnss api data to pseudorange:
From http://garrett.seepersad.org/blog/where-are-my-gnss-measurements
%% Constants C = 299792458; % Speed of light weekSeconds = 604800; % Seconds in a week
%% Input getTimeOffsetSeconds = 0; % getTimeOffsetNanos1E-9 getBiasSeconds = 0; % getBiasNanos1E-9 FullBiasSeconds = -1155937562.91587; % getFullBiasNanos() *1E-9 TimeSeconds = 17.084; % getTimeNanos() *1E-9 ReceivedSvTimeSeconds = 164779.928555738; % getReceivedSvTimeNanos() *1E-9
%% Calculate pseudorange weekNumber = floor(-1*(FullBiasSeconds)/weekSeconds); % Calculate GPS week weekNumberSeconds = (weekNumber)(weekSeconds); secondsOfWeek = (-1FullBiasSeconds) - weekNumberSeconds - getBiasSeconds; % Seconds of the week the device was turned on TimeTransmitted = (ReceivedSvTimeSeconds); TimeReceived = (secondsOfWeek + TimeSeconds + getTimeOffsetSeconds);
C1Pseudorange = (TimeReceived-TimeTransmitted)*C