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Results for “beacons”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 91 records · Page 5

All sources NASA NTRS DOE OSTI

NASA NTRS1965

Eccentric geophysical-observatory satellite S-49 with interpretation of the radio- beacon experiment Technical report no. 1

Evaluation of radio beacon data from satellite observation of earth exosphere - data scaling techniques

EXOSPHERE↗

NASA NTRS1965

An investigation of second-order corrections to first-order ray theory as applied to beacon satellite transmission studies

Second order corrections to first order ray theory of wave propagation through ionosphere as applied to Beacon satellite transmission studies

IONOSPHERIC PROPAGATION↗

NASA NTRS1966

Solar reflecting beacon Final report, 16 Jun. 1965 - 16 Apr. 1966

Systems design study for earth visible and astronaut visible lunar solar reflecting beacons to aid in descent and landing of lunar excursion module and other lunar landing vehicles

LUNAR EXCURSION MODULE /LEM/↗

NASA NTRS1966

A timing experiment using the GEOS satellite optical beacon

Timing of GEOS satellite xenon beacon flashes

GEODETIC SATELLITE↗

NASA NTRS1965

The application of a beacon telemetry system for measuring orbital performance of the Echo II satellite.

Radio beacon telemetry system for measuring orbital performance of Echo II satellite, including internal pressure and skin temperature

TELEMETRY↗

NASA NTRS1965

Tracking of the Beacon-Explorer satellites with laser beams.

Accurate tracking of Beacon-Explorer orbiting optical reflectors, using pulsed ruby laser beams

RUBY LASER↗

NASA NTRS1965

Laser reflections from the Beacon Explorer satellites

Laser reflections from Beacon Explorer satellite

BEACON SATELLITE↗

NASA NTRS1966

Some geophysical measurements using extended range observations of a radio beacon satellite.

Ionospheric electron content measured using passage of transit IVA radio beacon satellite across view field of observing station

TRANSIT IVA SATELLITE↗

NASA NTRS2000

Beacon Spacecraft Operations: Lessons in Automation

A new approach to mission operations has been flight validated on NASA's Deep Space One (DS1) mission that launched in October 1998. The beacon monitor operations technology is aimed at decreasing the total volume of downlinked engineering telemetry by reducing the frequency of downlink and the volume of data received per pass.

spacecraft operations automation beacon↗

NASA NTRS1997

Flight Software Implementation of the Beacon Operations Experiment on the NASA New Millennium Deep Space 1 (DS-1) Mission

This paper will describe the implementation approach of the beacon monitor experiment on the DS-1 spacecraft.

Flight Software New Millennium Deep Space 1 cost b↗

NASA NTRS1997

Flight Software Implementation of the Beacon Monitor Expreiment On the NASA New Millennium Deep Space 1 (DS-1) Mission

A new technology that can lower the cost of mission operations on future spacecraft will be tested on the NASA New Millennium Deep Space 1 (DS-1) Mission. This technology, the Beacon Monitor Experiment (BMOX), can be used to reduce the Deep Space Network (DSN) tracking time and its associated costs on future missions.

cost Beacon Monitor Experiment↗

NASA NTRS1997

Beacon Monitoring Would Reduce Communication Requirements and Ground Interactions with Spacecraft

Beacon Monitoring denotes a concept for providing a spacecraft with a simple way to notify the gound when it requires interaction.

system↗

DOE OSTI2024

Anticipating Optical Availability in Hybrid RF/FSO Links Using RF Beacons and Deep Learning

Radiofrequency (RF) communications offer reliable but low data rates and energy-inefficient satellite links, while free-space optical (FSO) promises high bandwidth but struggles with disturbances imposed by atmospheric effects. A hybrid RF/FSO architecture aims to achieve optimal reliability along with high data rates for space communications. Accurate prediction of dynamic ground-to-satellite FSO link availability is critical for routing decisions in low-earth orbit constellations. In this paper, we propose a system leveraging ubiquitous RF links to proactively forecast FSO link degradation prior to signal drops below threshold levels. This enables pre-calculation of rerouting to maximally maintain high data rate FSO links throughout the duration of weather effects. We implement a supervised learning model to anticipate FSO attenuation based on the analysis of RF patterns. Through the simulation of a dense lower earth orbit (LEO) satellite constellation, we demonstrate the efficacy of our approach in a simulated satellite network, highlighting the balance between predictive accuracy and prediction duration. An emulated cloud attenuation model is proposed to provide insight into the temporal profiles of RF signals and their correlation to FSO channel dynamics. Our investigation sheds light on the trade-offs between prediction horizon and accuracy arising from RF beacon numbers and proximity.

FSO availability↗

NASA NTRS1963