CAVIAR Meeting

Exeter April 2010

Liam Tallis, Keith Shine, Tom Gardiner, Marc Coleman, Igor Ptashnik

Contents

• Assessment of H2O Line Intensities– Introduction– Camborne– Jungfraujoch

• Moving Toward the Absolute Calibration– Camborne

• Future Work

ASSESSMENT OF H2O LINE INTENSITIES

Introduction

Introduction

a τw + b τg + c

ASSESSMENT OF H2O LINE INTENSITIES

Camborne

Fit

Retrieved “a” parameter

MCT Problems

MCT Problems

MCT Problems

MCT Problems

Fit Wings of Strong Lines

Fit All of Weaker Lines

Retrieved “a” parameter

MCT Retrieved “a” Numbers

Flight Date Time (U.T.)Solar Zenith Angle

Average a Value Between 820cm-1 and 920cm-1

B396 19 Aug 2008 130941 38.77 0.976131050 38.83 0.980131204 38.89 0.979131243 38.92 0.979

B400 18 Sep 2008 111459 48.98 0.976111459 48.98 1.021

ASSESSMENT OF H2O LINE INTENSITIES

Jungfraujoch

Fit

Retrieved “a” parameter

ABSOLUTE CALIBRATION

Optical Depth at Camborne

Optical Depth at Camborne

Optical Depth at Camborne

Optical Depth at Camborne

FUTURE WORK IDEAS

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