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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. Introduction. Assessment of H 2 O Line Intensities. - PowerPoint PPT Presentation
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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