Importing a stack of maps: timeinput

Inputs known for each timestep, for all locations

Stack of maps: series of maps with filename extensions 001, 002, 003.. etc.

For instance:

rainfall.001  rainfall.006  rainfall.011  rainfall.016  rainfall.021  rainfall.026
rainfall.002  rainfall.007  rainfall.012  rainfall.017  rainfall.022  rainfall.027
rainfall.003  rainfall.008  rainfall.013  rainfall.018  rainfall.023  rainfall.028
rainfall.004  rainfall.009  rainfall.014  rainfall.019  rainfall.024
rainfall.005  rainfall.010  rainfall.015  rainfall.020  rainfall.025