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Current technologies available for deep-space optical data transmission and networking are discussed in this paper, as well as ongoing experiments, future perspectives, and applications. ABSTRACT | The concept of deep-space optical communications was formulated shortly after the invention of lasers. The promise of laser communications, high data rate(More)
We report on engineering trades that led to the conceptual design of a laser communications terminal for a spacecraft orbiting Mars. The flight terminal, the ground receiver and the ground transmitter subsystems are described. The designed system is capable of 0.25 Gb/s downlink data-rate, 0.3 Mb/s uplink data-rate, and ranging with a 30 cm precision when(More)
Advanced Radio Interferometry Between Space and Earth (ARISE) is a space very long baseline interferometry (VLBI) mission with a nominal launch date of 2008. It consists of an inflatable 25-m radio telescope circulating in a highly elliptical Earth orbit with a perigee of 5,000 km and an apogee of 40,000 km. The objective is to observe in conjunction with(More)
  • Hamid Hemmati
  • 2014
In response to an ever increasing demand for higher bandwidth, the free space optical (laser) communications technology has now matured to the point that is has commenced commercial use in Earth orbit at multi-Gb/s data-rates, and is on the verge of being demonstrated for the first time from other planets. This technology has long been used in terrestrial(More)
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