Engineering topics

Wilson, K.

Publications and source records attributed to Wilson, K..

At least 37 records · Page 2

NASA NTRS2004

Adaptive Optics Communications Performance Analysis

The performance improvement obtained through the use of adaptive optics for deep-space communications in the presence of atmospheric turbulence is analyzed. Using simulated focal-plane signal-intensity distributions, uncoded pulse-position modulation (PPM) bit-error probabilities are calculated assuming the use of an adaptive focal-plane detector array as well as an adaptively sized single detector. It is demonstrated that current practical adaptive optics systems can yield performance gains over an uncompensated system ranging from approximately 1 dB to 6 dB depending upon the PPM order and background radiation level.

Srinivasan, M.↗

NASA NTRS2003

Daytime adaptive optics for deep space optical communications

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Mars↗

NASA NTRS2003

Optical ground station site diversity for Deep Space Optical Communications the Mars Telecom Orbiter optical link

Future NASA deep space missions will fly advanced high resolution imaging instruments that will require high bandwidth links to return the huge data volumes generated by these instruments. Optical communications is a key technology for returning these large data volumes from deep space probes. Yet to cost effectively realize the high bandwidth potential of the optical link will require deployment of ground receivers in diverse locations to provide high link availability. A recent analysis of GOES weather satellite data showed that a network of ground stations located in Hawaii and the Southwest continental US can provide an average of 90% availability for the deep space optical link. JPL and AFRL are exploring the use of large telescopes in Hawaii, California, and Albuquerque to support the Mars Telesat laser communications demonstration. Designed to demonstrate multi-Mbps communications from Mars, the mission will investigate key operational strategies of future deep space optical communications network.

laser communications↗

NASA NTRS2003

Daytime adaptive optics for deep space optical communications

In this paper we present our early analytical results that demonstrated the improvement in the optical communications system performance when adaptive optics techniques are implemented in a high background environment.

lasercom↗

NASA NTRS2003

AFRL optical ground stations for MTO lasercom demo

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ground station↗

NASA NTRS2003

Performance analysis and comparison of clustered and linearly dispersed optical deep space networks

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telescope network optical comm deep space ground-b↗

NASA NTRS2003

Trends in ground based laser tracking global network for deep space applications

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tracking laser deep space satellite↗

NASA NTRS2002

Multi-gigabit data-rate optical communication depicting LEO-to-GEO and GEO-to-Ground Links

Communication links with multi-gga-bits per sec (Gbps) data-rates depicting both LEO-GEO and GEO-to-Ground optical communications were characterized in the laboratory.

optical communications laser communication↗

NASA NTRS2001

Multi-gigabit data-rate optical communication depicting LEO-to-GEO and GEO-to-Ground links

The goal is to develop key components for a technology that will enable optical communications to meet the data delivery requirements of the EOS (Earth Observing Spacecraft) community.

optics communication↗

NASA NTRS2000

Optical communications for deep space missions

This paper describes the activities at JPL to evaluate optical communication systems for use on deep space exploration spacecraft.

optical↗

NASA NTRS2000

Optical communications at JPL

UNKNOWN

optical↗

NASA NTRS2000

Progress in Design and Construction of the Optical Communications Telescope Laboratory (OCTL)

JPL is constructing an Optical Communications Telescope Laboratory (OCTL) at its Table Mountain Facility complex in the San Bernadino Mountains of Southern California.

free↗

NASA NTRS2000