1. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 1 pT Microwindows Anu Dudhia University of Oxford

2. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 2 350 Microwindows

3. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 3 360 Microwindows

4. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 4 RR27 pT Microwindows  Reduced resolution & lower altitudes  need to use CO2 laser band for low altitude retrievals  Oversampling low altitudes  need many laser band MWs  Laser band causes problems with discontinuities and (potentially) non-LTE effects  Latest selection (MW#361-366) uses additional MW at 790cm-1 to give improved tropospheric coverage and reduced reliance on laser band below 21km

5. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 5 AE Mode Dec06 Anu Dudhia University of Oxford

6. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 6  26-29 Dec 2006 mixed NOM and AE mode data  Single L1B files contain complete orbit (unlike orig May’05)  Also: last sweep of last scan of each orbit flagged as corrupt

7. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 7

8. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 8

9. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 9

10. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 10

11. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 11

12. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 12 Dec’06 AE mode data appears to have the same problems as earlier May’05 data:  L1B (engineering) altitudes are 2 km lower than given in mission planning document (5,7.5…km instead of 7,8.5…km)  L1B altitudes for sideways viewing appear to be approx 4.5km below actual tangent altitudes (based on climatological pressure)  L1B altitudes for rearward viewing appear to be approx 0.5km below actual tangent altitudes Conclusions

13. Atmospheric, Oceanic & Planetary Physics, University of Oxford A Dudhia MIPAS QWG12 ESRIN 14-16 Feb 2007 Page 13