srtm_height_profile#

pycraf.pathprof.srtm_height_profile(lon_t, lat_t, lon_r, lat_r, step, generic_heights=False)[source]#

Extract a height profile from SRTM data.

Parameters:

lon_t, lat_tQuantity: Geographic longitude/latitude of start point (transmitter) [deg]
lon_r, lat_rQuantity: Geographic longitude/latitude of end point (receiver) [deg]
stepQuantity: Distance resolution of height profile along path [m]
generic_heightsbool: If generic_heights is set to True, heights will be set to zero. This can be useful for generic (aka flat-Earth) computations. (Default: False)

Returns:

lonsQuantity 1D array: Geographic longitudes of path.
latsQuantity 1D array: Geographic latitudes of path.
distanceQuantity scalar: Distance between start and end point of path.
distancesQuantity 1D array: Distances along the path (with respect to start point).
heightsQuantity 1D array: Terrain height along the path (aka Height profile).
bearingQuantity scalar: Start bearing of path.
backbearingQuantity scalar: Back-bearing at end point of path.
backbearingsQuantity 1D array: Back-bearings for each point on the path.

Notes

distances contains distances from Transmitter.
SRTM data tiles (*.hgt) need to be accessible by pycraf. It is assumed that these are either present in the current working directory or in the path defined by the SRTMDATA environment variable (sub-directories are also parsed). Alternatively, use the SrtmConf manager to change the directory, where pycraf looks for SRTM data, during run-time. The SrtmConf manager also offers additional features such as automatic downloading of missing tiles or applying different interpolation methods (e.g., splines). For details see Working with SRTM data.