Engineering topics
Publications and source records attributed to Cesarone, R..
This paper discusses the large array background, scope, and evolution, and some of the lessons learned from preliminary studies of the uplink array.
Recent advances in space technology for Earth observations, global communications, and positioning systems have created heavy traffic at a variety of orbits. These include smart sensors in low Earth orbits (LEO), internet satellites in LEO and GEO orbits, Earth observing satellites in high Earth orbits (HEO), observatory class satellites at Lagrangian libration points, and those heading for deep space.
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The objective of this paper is to compare the operational and performance cost factors for an Optical Deep Space Network (OSDN).
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Optical communications can provide high-data-rate telemetry from deep-space probes with subsystems that have lower mass, consume less power, and are smaller than their radio frequency (RF) counterparts. However, because optical communication is more a.ected by weather than is RF communication, it requires groundstation site diversity to mitigate the adverse e.ects of inclement weather on the link. An optical relay satellite is not a.ected by weather and can provide 24-hour coverage of deep-space probes. Using such a relay satellite for the deep-space link and an 8.4-GHz (X-band) link to a ground station would support high-data-rate links from small deep-space probes with very little link loss due to inclement weather. We have reviewed past JPL-funded work on RF and optical relay satellites, and on proposed clustered and linearly dispersed optical subnets. Cost comparisons show that the life cycle costs of a 7-m optical relay station based on the heritage of the Next Generation Space Telescope is comparable to that of an 8-station subnet of 10- m optical ground stations. This makes the relay link an attractive option vis- a-vis a ground-station network.
In this paper we will discuss and analyze various ways that phased array technology can be utilized to provide multifunction capabilities for planetary space applications.
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In this paper they discuss various options but focus on the feasibility of the phased arrays as a viable option for this application.
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NASA's Mars Surveyor Program is developing plans for an evolving constellation of satellites in Mars orbit, called the Mars Network, to support the telecommunication and navigation needs of future Mars exploration.
Mars has become the focus of an unprecedented series of missions spanning many years, involving numerous nations and evolving from robotic to human exploration.
A recent Mars Exploration Program Architecture Definition Study, conducted by NASA with strong international participation, recommands establishment of a low cost in-situ communications and navigation relay satellite network to provide enabling and enhancing support for the international exploration of Mars.