Test AMSUA in HAFS domain

[XuLu-NOAA]

This is to document the test of assimilating amsua radiance data from noaa_19, metop_b/c.
Work will include the following steps:

1. Convert budr data to ioda with bufr2ioda tools
2. Convert bias file to ioda with bufr2ioda tools
3. Modify the yaml file from ATMS test accordingly
4. Check the assimilation results
5. Add into the test case.

[XuLu-NOAA]

Additional notes:
Example for tlapse rate:
file=amsua_n15
awk -v sid="$file" '$2 == sid {print $2, $3, $4}' satbias_in > amsua_n15.tlapse.txt

Example yaml file for different radiance:
hafs_jedi.fd/parm/jcb-gdas/observations/atmosphere

[XuLu-NOAA]

Single ob and multiple ob tests show some similarities, but differences remain. Major differences may come from: the all-sky in JEDI and clear-sky in GSI, and CRTM version 2.4.0.1 in GSI versus version 2.4.1 in JEDI.
https://docs.google.com/presentation/d/1lHiXCiXYe2sWcYkECVJr8rGTwQAJvmirSv3cV6rQcfg/edit#slide=id.p