Limb tracegases : verification with scientific processors K-U- Eichmann, C. von Savigny , H. Bovensmann , A. Kokhanovsky , (presented by M. Weber). Bremen 6.12.2010. IUP & DLR limb ozone retrieval:. IUP V2.1 (L1 V6/V7):
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Limb tracegases: verification with scientific processorsK-U- Eichmann, C. von Savigny, H. Bovensmann, A. Kokhanovsky,(presented by M. Weber)
IUP V2.1 (L1 V6/V7):
central wavelength of the Chappuis triplet is shifted from 601 to 589 nm
Tikhonov parameter linearly decreases with altitude from 9 at 72 km to 3 at 7 km instead of constant value of 6
Foward model is changed from SCIATRAN 2.2 to SCIATRAN 3.0
Spectral region: 2 nm spectral intervals centered around: 264 nm, 267.5, 273, 283, 286, 288, 290.5, and 305 (UV) as well as 525, 589, and 675 nm (Chappuis band)
Surface albedo: geographical database [Matthews, 1983]
Use of a latitude dependent aerosol climatology ECSTRA [Bingen, 2000]
OP 5.1 (DLR operational retrieval on L1 V7 )
DOAS retrieval in Chappuis band
altitude coverage: 15-40 km (IUP retrieval: 10-70 km)
Verification of OP5 with SCIATRAN 2.3: 4 months of data in 2003 and 2010 were used.
OP5 ozone is on average about 8% higher for all tangent heights. Results are similar for the years 2003 and 2010.
-25/25 : +10%
Limb NO2: OP3/4 (from PM4) and OP5.1
OP5.01: comparison with IUP V3.1 (200301-04)