I have been trying to estimate instantaneous total solar irradiance(w/m2) at five minute interval for a day (eg. 21 sept). I can do this in SAGA GIS by using "moment, mode 1" and running the solar module for 12*24 time.
Therefore, for automation purpose I want to stick to GRASS. I have looked into
r.sun.hourly however I am unable to use these function to produce output at 5 minute interval.
Here is the sample code from
r.sun.hourly -t elevation=example_data@PERMANENT start_time=6 end_time=18 time_step=.08 day=277 year=2011 beam_rad_basename=beam diff_rad_basename=dif glob_rad_basename=tot nprocs=6