add dt-varying search range routine #26
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Adding dt-varying search range routine with 4 parameters:
dt_unity,max_factor,upper_thldandlower_thld. This is useful in areas with large seasonal variability and/or surge behavior in velocity that may not be well captured by the user defined search rangeThe user defined search range field will be multiplied by a factor which is defined as:
max_factorwhendt = 11whendt >= dt_unitymax_factorto1when1 <= dt <= dt_unityThe resulting search range, in unit of m/yr, is then truncated based on the upper and lower thresholds (
upper_thldandlower_thld) that are defined by the user.By default, these parameters are set to:
dt_unity = 182(unit of days),max_factor = 5(unitless),upper_thld = 20000(unit of m/yr),lower_thld = 0(unit of m/yr)Users can easily change these four parameters in testGeogrid script where some example lines have already been provided (but commented out) for setting values of the four parameters here.