CONTENTS

Annex 1  Telecommunication requirements and characteristics of EESS and MetSat service DCS and platform location
 1     Principle and applications
 2     Satellite system design
        2.1     LEO satellite systems
        2.2     GSO satellite systems
 3     Platform location
 4     Platform modes of operation
        4.1     Interrogated platforms
                  4.1.1     Interrogated platforms in GSO satellite systems
                  4.1.2     Interrogated platforms in LEO satellite systems
        4.2     Platforms operating in a random access mode
        4.3     Self-timed platforms
 5     Typical platform transmitter characteristics
        5.1     Platforms of LEO systems
                  5.1.1     PSK/PM platforms
                  5.1.2     Mixed QPSK platforms
                  5.1.3     GMSK platforms
                  5.1.4     Receiver downlink
        5.2     Platforms of GSO systems
                  5.2.1     International Data Collection System (IDCS)
                  5.2.2     Regional data collection service
 6     Typical satellite receiver characteristics
        6.1     LEO satellite receiver characteristics
                  6.1.1     ARGOS DCS satellite receiver characteristics
                  6.1.2     MOS DCS satellite receiver characteristics
                  6.1.3     Brazilian DCS satellite receiver characteristics
        6.2     GSO satellite receiver characteristics
        6.3     LEO satellite-to-platform transmitter characteristics
        6.4     LEO satellite-to-station transmitter characteristics for transparent transponder
        6.5     GSO satellite transmitter characteristics
 7     Conclusions