Results 31 to 40 of about 2,781,871 (195)

Dust Deposition at Zhurong Landing Site From Multispectral Camera Observations

open access: yesGeophysical Research Letters, 2023
Dust deposition is one of the most predominant processes occurring on Mars. Until now, just a few in situ observations have been conducted to investigate the Martian dust.
Qing Zhang   +9 more
doaj   +1 more source

A Study of Autonomous Small Satellite Constellations for Disaster Management and Deep Space Strategy

open access: yesRemote Sensing, 2022
The complex and dynamic space environment is both exciting and challenging in this NewSpace era. In particular, Low-Earth Orbits are being realigned and reinvented for various purposes using suitable technological advancement.
Mohammed Irfan Rashed, Hyochoong Bang
doaj   +1 more source

Mariner II Deep Space Telecommunications [PDF]

open access: yes, 1963
Two major telecommunication activities were in process during the Venus encounter of 1962, the largest, activity involved the two-way communications and tracking of the Mariner spacecraft from the DSIF (Deep Space Instrumentation Facility) stations on ...

core   +1 more source

Design and Analysis of a Micro–Electro-Mechanical System Thruster for Small Satellites and Low-Thrust Propulsion

open access: yesAerospace
As a cost-effective and versatile solution, small satellites are increasingly being considered for space exploration. However, one of the major challenges in deploying small satellites for high total impulse missions, particularly deep space exploration,
Yubin Zhong   +6 more
doaj   +1 more source

Deep space FM system, a concept [PDF]

open access: yes, 1968
Deep space frequency modulation system permits transmission of data where the signal deviation is greater than 1/2 the predetection bandwidth.
Doland, G. D.
core   +1 more source

Simulating Atmospheric Dust With a Global Variable‐Resolution Model: Model Description and Impacts of Mesh Refinement

open access: yesJournal of Advances in Modeling Earth Systems, 2023
In this study, a global variable‐resolution modeling framework of atmospheric dust and its radiative feedback is established and evaluated. In this model, atmospheric dust is simulated simultaneously with meteorological fields, and dust‐radiation ...
Jiawang Feng   +6 more
doaj   +1 more source

The Delayed Response of the Troposphere‐Stratosphere‐Mesosphere Coupling to the 2019 Southern SSW

open access: yesGeophysical Research Letters, 2022
A strong Southern Hemisphere (SH) sudden stratospheric warming event occurred in September 2019 and significantly weakened the stratospheric polar vortex. Due to the positive zonal wind anomalies in the troposphere, the barotropic/baroclinic instability,
Chengyun Yang   +5 more
doaj   +1 more source

Deep Space Network information system architecture study [PDF]

open access: yes, 1992
The purpose of this article is to describe an architecture for the Deep Space Network (DSN) information system in the years 2000-2010 and to provide guidelines for its evolution during the 1990s.
Atkinson, D. J.   +9 more
core   +1 more source

Spectrum-based deep neural networks for fraud detection

open access: yes, 2017
In this paper, we focus on fraud detection on a signed graph with only a small set of labeled training data. We propose a novel framework that combines deep neural networks and spectral graph analysis. In particular, we use the node projection (called as
Li, Jun   +3 more
core   +1 more source

NASA Light Emitting Diode Medical Applications from Deep Space to Deep Sea [PDF]

open access: yes, 2001
This work is supported and managed through the NASA Marshall Space Flight Center-SBIR Program. LED-technology developed for NASA plant growth experiments in space shows promise for delivering light deep into tissues of the body to promote wound healing ...
Buchmann, Ellen V.   +14 more
core   +1 more source

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