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pT Microwindows Anu Dudhia University of Oxford

pT Microwindows Anu Dudhia University of Oxford. 350 Microwindows. 360 Microwindows. RR27 pT Microwindows Reduced resolution & lower altitudes  need to use CO2 laser band for low altitude retrievals Oversampling low altitudes  need many laser band MWs

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pT Microwindows Anu Dudhia University of Oxford

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  1. pT Microwindows Anu Dudhia University of Oxford

  2. 350 Microwindows

  3. 360 Microwindows

  4. RR27 pT Microwindows • Reduced resolution & lower altitudes  need to use CO2 laser band for low altitude retrievals • Oversampling low altitudes  need many laser band MWs • Laser band causes problems with discontinuities and (potentially) non-LTE effects • Latest selection (MW#361-366) uses additional MW at 790cm-1 to give improved tropospheric coverage and reduced reliance on laser band below 21km

  5. AE Mode Dec06Anu DudhiaUniversity of Oxford

  6. 26-29 Dec 2006 mixed NOM and AE mode data • Single L1B files contain complete orbit (unlike orig May’05) • Also: last sweep of last scan of each orbit flagged as corrupt

  7. Conclusions • Dec’06 AE mode data appears to have the same problems as earlier May’05 data: • L1B (engineering) altitudes are 2 km lower than given in mission planning document (5,7.5…km instead of 7,8.5…km) • L1B altitudes for sideways viewing appear to be approx 4.5km below actual tangent altitudes (based on climatological pressure) • L1B altitudes for rearward viewing appear to be approx 0.5km below actual tangent altitudes

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