The ITU Radiocommunication Assembly, considering that the hypothetical reference system specified in Recommendation ITU-R SA. 1020 defines space-to-Earth links for direct readout of data and acquisition of recorded data; that the performance objectives for these transmissions must be consistent with the attendant functional requirements and with the performance limitations associated with the systems and Cequency bands in which the requirements will be fulfilled.
ITU-R SA.1020 SPANISH-1994 Referenced Document
ITU-R SA.1020 Hypothetical Reference System for the Earth Exploration-Satellite and Meteorological-Satellite Services
ITU-R SA.1021 Methodology for Determining Performance Objectives for Systems in the Earth Exploration-Satellite and Meteorological-Satellite Services
ITU-R SA.1020 SPANISH-1994 history
1994ITU-R SA.1020 SPANISH-1994 HYPOTHETICAL REFERENCE SYSTEM FOR THE EARTH EXPLORATION-SATELLITE AND METEOROLOGICAL-SATELLITE SERVICES