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NRT Notification Detail
| Publication of ROM SAF Report 28 on WO modeling in ROPP-9 |
| DATE: 2018-04-03 12:08 TYPE: ROPP |
| Description |
| Dear ROM SAF GTS User Issued : 2018-04-03 12:07 UTC Description of wave optics modelling in ROPP-9 and suggested improvements for ROPP-9.1 Report link: http://www.romsaf.org/general-documents/rsr/rsr_28.pdf Abstract: The physical basis of the wave optics simulation code included in ROPP-9 is described. The ROPP wave optics simulation code is based on a multiple phase screen (MPS) approach which is well known, and so it is only reviewed briefly. A new method for computing the phase and amplitude at the LEO satellite, given the phase and amplitude at the final phase screen, is described in detail. More specifically, it is shown that the solution at the LEO can be computed efficiently in terms of standard Fresnel integrals. The simulations are tested by inverting the phase and amplitudes with a Full Spectrum Inversion (FSI) approach to produce bending angle profiles, and then comparing these with a one-dimensional geometrical optics forward model. Some errors for large bending angle cases in the lowest 2 km are identified, and improvements for implementation in ROPP-9.1 are presented. ROPP-9 users can contact S. B. Healy (sean.healy@ecmwf.int) directly for more information relating to the ROPP-9.1 changes. Kind regards The ROM SAF Team |
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