Abstract: A ground station for satellite communication transmission systems which utilize a beam which is relatively narrow in the "hour angle direction" and is relatively wide in the "declination angle direction" so as to prevent interference from satellites on geostationary orbits and resulting in an antenna which is longer in the longitudinal direction than it is in the transverse direction, thus, making it easy to move from place to place without disassembly.

Abstract: A method for detecting the coincidence between the phase position of a code of an SSMA signal which has been received with a heterodyne receiver and the code which is produced in the receiver through means for evaluating the signal power increase in an intermediate frequency position when the correct phase position occurs.

Abstract: A receiver for electric oscillations modulated in SSMA technique with which, in an intermediate frequency position, a multiplier is provided for multiplying the intermediate frequency signal with a code which is to be received, and with which a synchronous demodulator for obtaining the information to be received is connected to the multiplier, wherein the receiver includes in a section preceding the multiplier a gain control amplifier having two control voltage derivation circuits assigned thereto for deriving control signals, one of the voltage derivation circuits operable to evaluate the output signal of the multiplier and other of the voltage derivation circuits operable to evaluate the output of a synchronous demodulator so that in an unsynchronized state of the synchronous demodulator the control signal which is derived from the multiplier output serves to control the gain control amplifier and in the case of synchronous operation the control signal derived from the synchronous demodulator is employed to