Namelist options for commercial RO

[KristenBathmann]

Two namelist options will be added for commercial RO assimilation. These will be included in setup. The option gpstopalt will cutoff commercial data above this height. For example, setting gpstopalt=45.0 rejects all commercial data above 45 km. The option gpserrinf inflates commercial data errors. For example gpserrinf=1.5 multiplies the error by 1.5 at all levels.

This work is being done under release/gfsda.v16.1.0

[dtkleist]

Do we want to make the names of these parameters more explicit so it is obvious that they apply to commercial GPSRO only and not all bending angle obs?

[KristenBathmann]

Sure, how about commgpstop and commgpserrinf?

[dtkleist]

Works for me.

[KristenBathmann]

The new namelist options are working correctly. The cost function is lowered by cutting off commerical RO at 45 km, and by inflating the errors:

Setting commgpstop to 55. (the current value for gpstop) allows all commerical RO below 55 km to be assimilated:

Setting commgpstop to 45. cuts off the commerical RO at 45 km:

Setting commgpstop to 45. does not affect other instruments:

[MichaelLueken]

These changes have been merged to the authoritative repo at 51a6564. Closing this issue.