1. Status of Generation of Simulated Observations for the Joint OSSEBy
Ronald M. Errico (GMAO and GEST)
Runhua Yang (GMAO and SSAI )
Acknowledgements: Meta Sienkiewicz, Emily Liu, Ricardo Todling,
Ronald Gelaro, Joanna Joiner, Tong Zhu,
Quansheng Liu, and Michele Rienecker

2. Completed Software Version P2
Software for generating conventional obs (NCEP .prepbufr file)
Software for simulating radiances for HIRS2/3, AMSUA/B, AIRS, MSU
Software for generating random obs. error
GSI BUFR format
Tunable parameters
Adaptable software
Documented software

3. Experiments Evaluation for Jan 2006
Spin-up starts Dec 1 (exp. 1) or Dec 15 (exp. 2)
Data assimilation system: NCEP/GMAO GSI (3DVAR), 6-hour periods
Resolution of DAS: 2 deg lat, 2.5 deg lon, 72 levels, top at 1 Pa
Conventional Obs include: raobs, aircraft, ships, vad winds, wind profilers,
sfc stations, SSMI and Qkscat sfc winds, sat winds
(Approx # used 1.4 M/day)
Radiance Obs include: HIRS2, HIRS3, AMSUA, AMSUB, AIRS, MSU
(Approx # used = 3 M/day)
Exp. 1: First experiment with simulated obs (no MSU)
Exp. 2: Several corrections and first attempt at tuning

4. Standard Deviation of the analysis increment for the
u-wind in the former
NCEP/ECMWF OSSE
T170L42 resolution
Feb obs network

5. Exp 2 of new OSSE
(N.B. color tables differ)

6. Exp 2 of new OSSE
(N.B. color tables differ)

7. Langland and Baker 2004
Gelaro et al 2007, G. and Zhu 2008
Errico 2007, Tremolet 2007

8. Impact estimates and obs counts for Exp 1

9. OSSE Calibration for Jan 2006 vs. Jan 2007 Reference
Exp 1
OSSE Calibration for Jan 2006 vs. Jan 2007 Reference
GEOS-5 DAS version and impact calculation same

10. Impact estimates and obs counts for Exp 2

11. HIRS-3 on NOAA-17
Brightness Temperatures
Channel 7
Exp 2, 5 Jan 2006, 00Z
(color tables differ)
Real Data
OSSE Data

12. The file cloud.rc HIRS (Exp 1) cloud_table
high cld hcld
med cld mcld
low cld lcld
HIRS (Exp 2)
high cld hcld
med cld mcld
low cld lcld
HIRS (Exp 3)
med cld mcld
low cld lcld

13. Distribution of cloud fraction fH L

14. HIRS-3 on NOAA-17 Histogram of O-F Channel 7 Real Data OSSE Data
Colors are distributions of Obs values.

15. The file error.rc HIRS3 (EXP 2) pert_fac 0.85 random_type 1223
corr_distance
file_err_table /sat_err_table.txt
_____
HIRS3 (EXP 3)
pert_fac
random_type

16. Brightness Temperatures Channel 1
AMSUA on AQUA
Brightness Temperatures
Channel 1
Exp 2, 5 Jan 2006, 00Z
(color tables differ)
Real Data
OSSE Data

17. Expected completion of next experiment Jan. 7, 2009.
What is next?
Look at more diagnostics from Exp 2:
a. Obs counts
b. Impact estimates
c. O-F
d. AC score
Re-tune cloud.rc parameters.
3. Check MW surface emissivity
4. Check obs counts for AMSUA
Expected completion of next experiment Jan. 7, 2009.
This should be usable by other investigators.