Multi-view Cloud-top Height and Wind Retrieval with Photogrammetric Methods: Application to Meteosat-8 Hrv Observations

The height assignment of atmospheric motion vectors (AMV) is still an open issue. From the numerous height assignment techniques, each retrieval method has its own characteristics. The presented stereophotogrammetric method has the advantage that it is only dependent on the geometry and therefore offers a completely independent height retrieval compared to the other methods. As polar-orbiting instrument, the Multi-angle Imaging SpectroRadiometer (MISR) onboard EOS-Terra is used. With its nine viewing angles, it offers simultaneous cloud-top height (CTH) and wind (CTW) retrieval from at least three non-symmetric cameras. The operational Meteosat satellites (M5, M7 and M8) allow geostationary stereo height retrievals within the overlap area over the Indian Ocean and East Africa. In addition to the M5/M7 combination, the new combination M5/M8 HRV is analyzed with our photogrammetric methods. Two examples of coincident MISR, Meteosat-5, -7 and -8 HRV data over the Indian Ocean and East Africa are shown. The stereo-photogrammetric CTH and CTW results from MISR, Meteosat-5/-7 and Meteosat-5/-8 HRV are then compared with the operational NASA-JPL MISR L2TC product.