1. Refmod maker Binput to sfit4.ctl converter update Output levels Comment line / version / run date / # reference 2 – every thing currently except very redundant data Better read checks add tag name Check units Check normalization – write out scale factors 1 – basic output, detail file, statevec, spectra, AK 0 – just for operational runs – binary format enough to build hdf (default) Ability to recalculate spectrum from previous retrieved state Error analysis mode New input block – a posteriori Entry for each kb ?? Or all we can? Separate snr ad-hoc versus real? Put snr in t15asc for each spectrum Allow different resolutions for a given µw sfit

2. Possible Components Already in K BckGrdSlp- background slope BckGrdCur- background curvature DWNumShft- differential wavenumber shift SWNumShft- single wavenumber shift IWNumShft- independent wavenumber shift EmpApdFcn- empirical apodization function EmpPhsFnc- empirical phase function SolLnShft- solar line shift Sollnstrn- solar line strength SPhsErr- simple phase error ZeroLev- zero level offset Interfering species- n other fit species Channel- 4 parameters / beam Jan/28/2013 IRWG/NORS Error Analysis Workshop, NCAR, January 2013 2

3. Jan/28/2013 IRWG/NORS Error Analysis Workshop, NCAR, January 2013 3 Components Requiring new K b not fitted: – Target gas absorption line(s) intensity – Target gas absorption line(s) air broadened line half-width – Retrieved gas absorption line(s) intensity – Retrieved gas absorption line(s) air broadened line half-width – Other possible line parameters: Self broadening Lower state energy Temperature dependence exponent pressure shift Galatry Beta Line mixing, SDV params: GAMMA2, ETA2, LMTK1, LMTK2, YLM – Solar pointing – Temperature – Kb from linefit output

4. Sb prescriptions defined by physical error source 1/ Pointing Time or ephemeris calculation (at racking and/or at synthetic spec. calc.) Bias on (quad) sensors SZA change during measurement integration time ? ILS both phase & modulation Error along scan path How many points or order of polynomial? (4 th order) Errors from linfit output: cell p, T instrument variability 120/M > 125HR… Solar intensity variation during course of scan Temperature Error by layer Some inter-layer correlation? If so what? From ensemble / NCEP ? Off axis values for Sb should be considered

5. Sb prescriptions defined by physical error source 2/ background slope background curvature differential wavenumber shift single wavenumber shift independent wavenumber shift solar line shift solar line strength simple phase error Separate from ILS phase ? zero level offset Fitted only

6. Documentation SFIT to hdf work flow - Bavo Ncar batch outline Sfit4 input file key Sfit4.ctl – mostly done Isotope.input – done Hbin.input- done Ils.dat- done but old Wvmr.input - Reference.prf / waccm / zpt Sfit4 output keys Nothing yet – start next week Sfit 4 theory to implementation How do options work Sb definition / outline

7. Kb from sfit – Jim, Mathias, Nicholas Sb outline – Martine to start – Expand and pass to group - Jim error calculation code – Stephanie refmaker.f90- Jim, Mathias Sfit4 workflow- Bavo Move codes to IRWG ws – Jim Sfit4 input/output key- Mathias Sfit4 implementation doc – Jim, New batching code- Hideaki, Nicholas, Jim – Input definition (control, spec list)- everyone – Output definition (hdf, list)- everyone Task manager- Bavo Specmaker - runlog or ckopus/prepspsec Provide testcases(3+ NDACC)- everyone Speclistmaker- after runlog Actions 1 Feb 2013