[GRASS-user] detrending time series maps

[Ivan Marchesini]

Dear colleagues

I would like to the advantage of the t.* modules for detrending a strd.

In the strd I have earth observation data irregularly sampled (2 or 3 
times per month), in the period November-February, for 7 years. They are 
not equally spaced (i.e gaps have different duration)

A simple t.rast.series analysis (opion=slope,offset) highlights that 
probably there is a descending trend when considering the maps ordered 
by id.

I would like to fit a proper time depending fitting curve for each pixel 
and then subtract the function from the real data.

any hints on how I can do this task exploiting the GRASS GIS modules or 
some simple bash/python scripting?

thank you

Ivan