Meeting on simulation of radiance  
December 6, 2007

Attendee
Jack Woollen, Jim Jung, Daved Groff, Runhua Yang, Haibing Sun, 
Tong Zhu, Michiko Masutani

Telecom
Yuanfu Xie, Daniel L Birkenheuer  (ESRL)


Materials are posted at
http://www.emc.ncep.noaa.gov/research/JointOSSEs/NR/Dec07/
including recording of the meeting.  WS_30001.WMA will be deleted 
when this location is linked.


Quick summary.

We need to speed up the simulation of radiance to produce data for 
precursor run.  The simulation has to be repeated with better designed 
method.  While NCEP/NESDIS are working on this quick work, GMAO 
will work on strategies for  simulation of radiance which will be used for 
OSSEs.

Michiko suggested 5% TCC for cut off to simulate clear sky radiance.  
Jack pointed out that will eliminate large number of good stratospheric 
channel, which can produce clear sky radiance even if TCC is large.

Jack proposed using quality mark from real world.  Radiance data were 
preselected, thinned,  cloud cleared and quality marked.  

1. Jack will produced DB91L for foot print used by GSI
2. Tong and Haibin will produce profile for selected foot print
3. Jack will add QC to the channel which were not used by GSI

Since the data will based on real cloud we will ended up producing clear 
sky radiance at cloudy area and missing data from clear area in NR.  
However, this is good enough for precursor run.