[GRASS-user] temporal raster accumulation

[Ivan Marchesini]

Dear GRASS users

I'm a little bit confused about which can be the best module/tool to 
perform the following task
I have a strd having a daily granularity. It contains total daily 
cumulated rainfall.

I would like to create a new strd where, for each day, I have the 
cumulated rainfall in the antecedent 5 days

can you kindly suggest which is the best tool (or combination of tools) 
to reach this aim?

thank you very much

Ivan