The Application of the External Reconstruction Technique to the Retrieval of Troposheric Water Vapor

Recently, inversion of Integral Water Vapor (IWV) measurements, obtained through the use of the Normalized Differential Spectral Absorption (NDSA) has been proposed to retrieve the tropospheric Water Vapor (WV) content. In this paper, the results of the application of the External Reconstruction Tomographic Algorithm (ERTA) to that problem are presented. The results have been obtained by considering a measurement scenario composed of LEO satellites orbiting in the same plane and along the same angular direction (co-rotating satellites).