pyPDAF.PDAF.omi_set_disttype

pyPDAF.PDAF.omi_set_disttype()

This function sets the disttype attribute of obs_f typically used in user-supplied function py__init_dim_obs_pdaf. disttype determines the way the distance between observation and model grid is calculated in OMI. See https://pdaf.awi.de/trac/wiki/OMI_observation_modules#thisobsdisttype

Parameters:

• i_obs (int) – index of observations

• disttype (int) – 0) Cartesian; 1) Cartesian periodic 2) Approximation to geographic distance in metres using latitude and longitude expressed in radians 3) Using Haversine formula to compute distance in metres between two points on the surface of a sphere 10) 3D Cartesian distance for 2D+1D factorised localisation where horizontal and vertical distances are treated separately 11) 3D Cartesian periodic distance for 2D+1D factorised localisation where horizontal and vertical distances are treated separately 12) Same as 2) for horizontal distance but vertical distance is in units chosen by users 13) Same as 3) for horizontal distance but vertical distance is in units chosen by users