[R] Computation of space-time empirical crosscovariances

[giovanna jona lasinio]

Dear all,
Is there any "simple" way to estimate an empirical crosscovariance
function for space-time data? More precisely if I have n space locations
in T times on which I observe one variable, I cannot find an already
made  R function that can compute the empirical crosscovariance.

Any suggestion?

Thanks 
Giovanna Jona Lasinio