Showing papers on "L band published in 1976"
01 Feb 1976
TL;DR: In this article, the feasibility of using adaptive multibeam multi-frequency antennas on the spacelab was studied, and the experiment configuration and program plan needed for a demonstration to prove the concept.
Abstract: The feasibility was studied of using adaptive multibeam multi-frequency antennas on the spacelab, and to define the experiment configuration and program plan needed for a demonstration to prove the concept. Three applications missions were selected, and requirements were defined for an L band communications experiment, an L band radiometer experiment, and a Ku band communications experiment. Reflector, passive lens, and phased array antenna systems were considered, and the Adaptive Multibeam Phased Array (AMPA) was chosen. Array configuration and beamforming network tradeoffs resulted in a single 3m x 3m L band array with 576 elements for high radiometer beam efficiency. Separate 0.4m x 0.4 m arrays are used to transmit and receive at Ku band with either 576 elements or thinned apertures. Each array has two independently steerable 5 deg beams, which are adaptively controlled.
1 citations
14 Jun 1976
TL;DR: The features of an orbiting L-band microwave radiometer experiment carried onboard the NASA Skylab satellite are described in this paper, where typical data and their usefulness are also presented so that both the instrument and its utility may be appreciated.
Abstract: The features of an orbiting L-band microwave radiometer experiment carried onboard the NASA Skylab satellite are described. Some typical data and their usefulness are also presented so that both the instrument and its utility may be appreciated.
1 citations