CAVIAR Meeting

CAVIAR Meeting

May 2010

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

Contents

• Assessment of H2O Line Intensities– 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

Retrieved “a” parametera = 1.02 +/- 0.03

a = 1.20 +/- 0.04a = 1.01 +/- 0.06

Camborne: Retrieved ‘a’

Spectral Region (cm-1) Retrieved ‘a’

3000 – 8000 0.97 +/- 0.02

8000 – 9200 1.17 +/- 0.05

10000 - 14000 0.98 +/- 0.07

Retrieved “a” against Pseudo Strength

Retrieved “a” against Pseudo Strength

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 0.976131243 38.92 0.979

B400 18 Sep 2008 111459 48.98 1.025

ASSESSMENT OF H2O LINE INTENSITIES

Jungfraujoch

Retrieved “a” parametera = 1.00 +/- 0.04

a = 1.17 +/- 0.04a = 0.99 +/- 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