Oxford-RAL IASI Group Meetings

Meeting#05 (14Apr15)

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RAL: Victoria Bennett, Brian Kerridge, Diane Knappett, Richard Siddans

Oxford: Anu Dudhia, Catherine Hayer, Tony Vincent


CH4 Retrievals (DK) [Prev] [Next]
Incorporate results of recent EUMETSAT study on IASI + MHS (microwave) retrievals: use study L2 products as a priori for IASI CH4, 3 test days. 3 cases, 1 Eumetsat T+q, 2: Eumetsat T,q + emiss, 3: Eumetsat T,q,emiss + cloud. Not yet clear which is best

IASI NRT web-site (CH) [Prev] [Next]
Now have data running in approximately NRT for IASI A and B. Running out of memory space (more RAM required?). Processed linear retrieval for IASI A for complete archive. Aim to have iterative retrieval in NRT if possible (SO2 heights). CEMS have to order IASI off-line data periodically, so occasionally gaps develop. Could NRT data be kept until off-line data available? IASI-A NRT feed not working since last week? VB would like sample netCDF output with a view to archiving the data. Issue getting ECMWF forecast data for NRT non-linear processing. Would it be better to use IASI operational T retrievals?

RFM Look-Up Tables (TV) [Next]
Working on RFM LUTs for different molecules, aiming to model RTTOV ensemble of 80 atmospheres within 0.1 of nominal IASI across whole IASI infrared range. CO2 and H2O are particular problems, eg finding suitable p,T axes (and VMR-axis for H2O). H2O LUTs are currently huge.