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

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

ASSESSMENT OF H 2 O LINE INTENSITIES Introduction

a τ w + b τ g + c

ASSESSMENT OF H 2 O LINE INTENSITIES Camborne

Retrieved “a” parameter a = / a = / a = /- 0.06

Camborne: Retrieved ‘a’ Spectral Region (cm -1 )Retrieved ‘a’ 3000 – / – / /- 0.07

Retrieved “a” against Pseudo Strength

MCT Problems

Fit Wings of Strong Lines

Fit All of Weaker Lines

Retrieved “a” parameter

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

ASSESSMENT OF H 2 O LINE INTENSITIES Jungfraujoch

Retrieved “a” parameter a = / a = / a = /- 0.05

Retrieved “a” parameter

ABSOLUTE CALIBRATION

Absolute Calibration

FUTURE WORK

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