RTTOV calls are potentially quite inefficient.

[simonrp84]

In rttov_driver.F90 it looks like we are calling RTTOV in an inefficient way:

call rttov_parallel_direct(stat, chanprof, opts, &
                          profiles(count:count), coefs, transmission, radiance, &
                          radiance2, calcemis, emissivity, traj=traj)

We're only passing a single profile at a time, which in the case of many processors but few channels could be inefficient. It'd be better to throw as many profiles as possible at RTTOV and let it figure out what to do with them.

[adamcpovey]

I could never work out why we did things that way. I'm a vote for changing it provided I don't have to do the changing.

[simonrp84]

If someone pays me then I'll change it ;-) Unfortunately I have too many things to do just now to take on anything else voluntarily.