Indian Journal of Science and Technology

Abstract

Currently, atmospheric motion vectors (AMVs) are hourly generated satellite derived product on operational basis at India Meteorological Department (IMD), New Delhi. These wind vectors are associated with errors and difficult to use in mesoscale models without considering the quality issues. Quality control is an integral part of the AMVs retrieval from geo-stationary satellites. Present paper deals with various quality indicator or flags used in Automatic Quality Control (AQC) scheme of European Organization for the Exploitation of Meteorological Satellites (EUMETSAT) with new coefficients and Auto Editor (AE) criterion at Cooperative Institute for Meteorological Satellite Studies (CIMSS) on Kalpana –1 satellite data. The results obtained from the new parameters in AQC and with height adjustment made with AE are more realistic and free from spurious winds in both Infrared (IR) and Water Vapour (WV) channels. Collocation with radiosonde during one month period shows an average decrease (decrease) of RMSE in CMVs (WVWs) is of the order of 4 % (3 %) and increase (decrease) in mean bias is of the order of 3 % (10 %).
Keywords: Automatic quality control (AQC), Atmosphere Motion Vector (AMV), IR, Meteorology, Wind vapour,India