Results 31 to 40 of about 1,971 (165)

Natural Frequencies of a Tethered Satellite System

open access: yesApplied Sciences
This study investigated the natural frequencies of a tethered satellite system to enhance stability and operational reliability. Tethered satellite systems provide many advantages for space missions but exhibit inherently complex dynamics due to the ...
Yihun Yoon, Woojae Jang, Jintai Chung
doaj   +1 more source

An analytical model for wind-driven Arctic summer sea ice drift [PDF]

open access: yesThe Cryosphere, 2016
The authors present an analytical model for wind-driven free drift of sea ice that allows for an arbitrary mixture of ice and open water. The model includes an ice–ocean boundary layer with an Ekman spiral, forced by transfers of wind-input ...
H.-S. Park, A. L. Stewart
doaj   +1 more source

The development of the Atmospheric Measurements by Ultra-Light Spectrometer (AMULSE) greenhouse gas profiling system and application for satellite retrieval validation [PDF]

open access: yesAtmospheric Measurement Techniques, 2020
We report in this paper the development of an embedded ultralight spectrometer (<3 kg) based on tuneable diode laser absorption spectroscopy (with a sampling rate of 24 Hz) in the mid-infrared spectral region.
L. Joly   +15 more
doaj   +1 more source

Tethered satellite opportunity

open access: yesEos, Transactions American Geophysical Union, 1984
The National Aeronautics and Space Administration (NASA) and the Piano Spaziale Nazionale of the Consiglio Nazionale Delle Ricerche of Italy (PNS/CNR) are inviting researchers to participate in the first three flights of the Tethered Satellite System (TSS) on the space shuttle. The Tethered Satellite, a joint Italian/U.S.
openaire   +1 more source

The flight of the tethered satellite system

open access: yesEos, Transactions American Geophysical Union, 1992
The first Tethered Satellite System (TSS‐1) Electrodynamics Mission is scheduled for launch aboard the space shuttle ST‐46 on July 31, 1992, as a joint mission between the United States and Italy. A 500‐kg, 1.6‐m‐diameter satellite, attached to the shuttle by a thin (.24 cm), conducting, insulated wire (tether), will be reeled upwards from the orbiter ...
Dennis Papadopoulos   +2 more
openaire   +2 more sources

Spinning Tethered Systems: Opportunities for Improved Earth Observation and Planetary Exploration

open access: yesRemote Sensing
Spinning tethered satellite systems represent a promising advancement in the design of spaceborne architectures for Earth and planetary observation.
Nicolò Trabacchin   +8 more
doaj   +1 more source

Upgrade and automation of the JPL Table Mountain Facility tropospheric ozone lidar (TMTOL) for near-ground ozone profiling and satellite validation [PDF]

open access: yesAtmospheric Measurement Techniques, 2019
As part of international efforts to monitor air quality, several satellite missions such as the Tropospheric Monitoring Instrument (TROPOMI) were deployed and others, like Tropospheric Emissions: Monitoring Pollution (TEMPO), are planned for the near ...
F. Chouza   +3 more
doaj   +1 more source

Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean [PDF]

open access: yesBiogeosciences, 2015
We studied time-series fluxes of diatom particles from 4 October 2010 to 18 September 2012 using bottom-tethered moorings with two sediment traps deployed at 180 and 1300 m depths at Station NAP (75° N, 162° W; 1975 m water depth) in the western Arctic ...
J. Onodera   +3 more
doaj   +1 more source

Dynamics and Staged Deployment Strategy for a Spinning Tethered Satellite System

open access: yesAerospace
This paper investigates flexible multibody dynamic modeling and a staged deployment strategy for large-scale spinning tethered satellite systems, targeting deployment instability, inefficiencies, and tension-induced fracture risks.
Yue Zhang   +3 more
doaj   +1 more source

An Improved Electron Pre-Sheath Model for TSS-1R Current Enhancement Computations

open access: yesAerospace, 2017
This report presents improvements of investigations on the Tethered Satellite System (TSS)-1R electron current enhancement due to magnetic limited collections.
Chunpei Cai
doaj   +1 more source

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