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

2. Contents Assessment of H 2 O Line Intensities – 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. Retrieved “a” parameter a = 1.02 +/- 0.03 a = 1.20 +/- 0.04 a = 1.01 +/- 0.06

7. Camborne: Retrieved ‘a’ Spectral Region (cm -1 )Retrieved ‘a’ 3000 – 80000.97 +/- 0.02 8000 – 92001.17 +/- 0.05 10000 - 140000.98 +/- 0.07

8. Retrieved “a” against Pseudo Strength

10. MCT Problems

14. Fit Wings of Strong Lines

15. Fit All of Weaker Lines

16. Retrieved “a” parameter

17. MCT Retrieved “a” Numbers FlightDateTime (U.T.) Solar Zenith Angle Average a Value Between 820cm-1 and 920cm-1 B39619 Aug 200813094138.770.976 13124338.920.979 B40018 Sep 200811145948.981.025

18. ASSESSMENT OF H 2 O LINE INTENSITIES Jungfraujoch

19. Retrieved “a” parameter a = 1.00 +/- 0.04 a = 1.17 +/- 0.04 a = 0.99 +/- 0.05

20. Retrieved “a” parameter

21. ABSOLUTE CALIBRATION

22. Absolute Calibration

27. FUTURE WORK

28. Future Work Assessment of Line Intensities – Camborne Completed; retrieved “a” are consistent with previous work at Reading – Jungfraujoch Work has began; will be fairly quick with confirmed water profiles. Initial results are quite promising to moving closer to band centres 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 Calibration data now available; work to begin after Camborne