1. CAVIAR Meeting Exeter April 2010 Liam Tallis, Keith Shine, Tom Gardiner, Marc Coleman, Igor Ptashnik

2. Contents Assessment of H 2 O Line Intensities – Introduction – Camborne – Jungfraujoch Moving Toward the Absolute Calibration – Camborne Future Work

3. ASSESSMENT OF H 2 O LINE INTENSITIES Introduction

4. a τ w + b τ g + c

5. ASSESSMENT OF H 2 O LINE INTENSITIES Camborne

6. Fit

7. Retrieved “a” parameter

8. MCT Problems

12. Fit Wings of Strong Lines

13. Fit All of Weaker Lines

14. Retrieved “a” parameter

15. MCT Retrieved “a” Numbers FlightDateTime (U.T.) Solar Zenith Angle Average a Value Between 820cm-1 and 920cm-1 B39619 Aug 200813094138.770.976 13105038.830.980 13120438.890.979 13124338.920.979 B40018 Sep 200811145948.980.976 11145948.981.021

16. ASSESSMENT OF H 2 O LINE INTENSITIES Jungfraujoch

17. Fit

18. Retrieved “a” parameter

19. ABSOLUTE CALIBRATION

20. Optical Depth at Camborne

24. FUTURE WORK IDEAS

25. Future Work Assessment of Line Intensities – Camborne Completed; retrieved “a” are consistent with previous work – Jungfraujoch Work has began; will be fairly quick with confirmed water profiles. Initial results are quite promising – Write up Already began writing this up as a paper.... Absolute Calibration – Camborne On going work; need to think in some detail now what is causing difference between model and observations (line lists, continuum model, Kurucz, water profiles.........) – Jungfraujoch No Work Yet