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Future deep-space exploration missions demand a broadband and integrated communication infrastructure to transport the scientific data to Earth. Optical communication employing optical arrays receiver is a viable alternative to the current NASA deep-space RF-based network. Atmospheric turbulence is a major limiting factor for the inter-planetary optical links. Investigation of the use of adaptive...
Telescope arrays receivers are analyzed for deep-space optical communications between Earth and Mars. It is shown that data rates up to 14 M bits/sec are possible when Mars is at the farthest range from the Earth.
Nonlinear transmission media can be used for high amplitude, narrow pulse generation. We developed the theory of pulse generation in one- and two-dimensional transmission lattices. We used a conventional CMOS process to fabricate these lattices. Using these structures, it is possible to generate signals with a bandwidth of more than the cut-off frequency of the fastest transistor on the same process...
This paper reports on a study of hybrid optical/radio frequency (RF) architectures for deep space missions. Previous proposed optical deep space communication architectures were generally designed to achieve 90% or better availability 24/7. This study, instead, considered alternative metrics and architectures. It focuses on a strategy to use RF links and existing RF infrastructure for navigation and...
On Earth, a large aperture telescope is required to achieve the substantial data rates needed for a deep space optical communication link. However, not only are large telescopes very costly but, it is also very difficult to attain near diffraction limited performance with large apertures. An array of relatively smaller sized telescopes combined to form a larger synthesized aperture is a viable and...
The primary motive for large transmit array of parabolic reflectors, also known as uplink array, was to explore alternate methods in order to replace the large 70m antennas of deep space network (DSN) such that the core capability for emergency support to a troubled spacecraft in deep space is preserved. Given that the Uplink Array is a new technology, the focus has always been on its feasibility...
Evolving optical deep space communication network architecture requires incremental growth in the total aperture. On the other hand, the cost of a large aperture telescope grows exponentially as a function of its diameter, therefore telescope array architecture could provide a cost effective scalable growth for an evolving optical deep space network. However, the total aperture size and the corresponding...
Multifunction phased array systems with radar, telecom, and imaging applications have already been established for flat plate phased arrays of dipoles, or waveguides. In this paper the design trades and candidate options for combining the radar and telecom functions of the deep space network (DSN) into a single large transmit array of small parabolic reflectors will be discussed. In particular the...
Although the technologies for large arrays of distributed reflector antennas with just downlink (receiving) capability have been well defined and proven for deep space applications, a similar architecture, i.e., the arraying of distributed reflector antennas for uplink (transmitting) applications has not been proven, tested, or built yet. In previous papers (Hurd, 2005) the need, feasibility, technology...
It has been very well established in the literature that the cost of a large aperture telescope grows exponentially as a function of its diameter. On Earth, large aperture telescopes in excess of 10m also have the disadvantage of undergoing gravitational and other environmental effects. Array configurations, instead, may be the potential alternatives when large aperture telescopes are considered for...
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