[GRASS-user] summing rasters with a condition given by other rasters

[Martin_Brandt]

I have the following issue to solve:
There is a MODIS NDVI time series with 23 images for one year, named ndvi_01
to ndvi_23. Then i have a
raster with integer values from 1-23 representing the start of the growing
season (SOS), and the end (EOS), the values differ for each pixel. What i am
trying to do is to create a raster which averages (or sums) all NDVI values
from ndvi_01 to ndvi_23 which are between SOS and EOS, for an example pixel
where SOS is 13 and EOS is 21 that would be an average of the 9 pixels in
ndvi_13 to ndvi_21.

Is this possible with GRASS 7 under Ubuntu?

kind regards,
Martin 



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