[GRASSLIST:3585] double floating point

[ivan marchesini]

hi to all...
can someone explain me the meaning of DCELL and FCELL maps???
I suppose there is a precision meaning.... but I'm not sure....
I'm interested about this problem because running the r.sim.sediment
module (not compiled by default into grass 53) I obtain sometimes the
next message: errore di virgola mobile (floating point error)....
We suppose the problem is due to the low value of some variables.... 
what do you think about this???
thank you very much for your help....
ivan