Results 61 to 70 of about 8,325 (213)

The discovery of a low mass, pre-main-sequence stellar association around gamma Velorum

, 2000
We report the serendipitous discovery of a population of low mass, pre-main sequence stars (PMS) in the direction of the Wolf-Rayet/O-star binary system gamma^{2} Vel and the Vela OB2 association.
Harmer, S., Jeffries, R. D., Kenyon, M., Naylor, T., Pozzo, M., Totten, E. J.   +5 more
core   +1 more source

Satellite Reentry Predictions During Sudden Stratospheric Warmings

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Prediction of uncontrolled satellite reentry time and trajectory are essential to avoid damages to human being and properties over land. Reentry time and trajectory are largely controlled by aerodynamic drag and mass neutral density below 200 km.
Jia Yue, Sean Bruinsma, Jack Wang, Nicholas Pedatella, Wandi Yu, Jean‐Charles Marty, Maria Kuznetsova   +6 more
wiley   +1 more source

Seeds of Doubt: North American farmers' experiences of GM crops [PDF]

, 2002
The picture the biotechnology industry has painted of GM crops in North America is one of unqualified success, after six years of commercial growing. The objective of this report was to assess whether this image is accurate and if not what problems have ...
Meziani, Gundula, Warwick, Hugh
core  

Global Energy Circulation During a Solar Wind Density Pulse

Space Weather, Volume 24, Issue 4, April 2026.
Abstract We study the propagation and impacts of a strong density pulse through the magnetosphere during 11:40–12:00 UT near the peak of a geomagnetic storm on 3 February 2022. Using the Space Weather Modeling Framework Geospace global simulation, we show how the energy transport in the magnetosphere is enhanced promptly after the pulse arrival at the ...
Tuija Pulkkinen, Matti Ala‐Lahti, Austin Brenner, Gábor Tóth, Daniel Welling, Timothy Keebler   +5 more
wiley   +1 more source

The task of detecting inconspicuous flying objects based on recording changes in the radiation characteristics of the Starlink satellite network

Вестник Самарского государственного технического университета. Серия: Технические науки
This work is devoted to the detection of inconspicuous flying objects (unmanned aerial vehicles) by ground-based means. The analysis of traditional methods of solving the problem under consideration, based on the use of active radar, is carried out.
Vladimir N. Vorozheikin, Dmitry A. Polyakov   +1 more
doaj   +1 more source

The discovery of the optical/IR counterpart of the 12s transient X-ray pulsar GS 0834-43 [PDF]

, 2000
We report the discovery of the optical/infra-red counterpart of the 12.3s transient X-ray pulsar GS0834-43. We re-analysed archival ROSAT PSPC observations of GS0834-43, obtaining two new refined positions, about 14" and 18" away from the previously ...
Campana, S., Covino, S., Di Paola, A., Fontana, A., Giallongo, E., Israel, G. L., Lazzati, D., Mereghetti, S., Polcaro, V. F., Roche, P., Stella, L., Verrecchia, F.   +11 more
core   +2 more sources

The Prediction of Short‐Term Atmospheric Density in Lower Thermosphere

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Accurate short‐term prediction of atmospheric density in the lower thermosphere (85–125 km) is essential for precise orbit determination and satellite drag mitigation, particularly during geomagnetic storms. Although physics‐based models such as NRLMSIS 2.1 provide empirical estimates, their effectiveness is limited under extreme space weather.
Zheng Li, Xiang Chen, Hua Zhang, Jingyuan Li, Yanan Sun   +4 more
wiley   +1 more source

Latency Performance Evaluation of LEO Starlink and SES-12 GEO HTS Network Under Tropical Rainfall Conditions

International Islamic University Malaysia Engineering Journal
High Throughput Satellites (HTS) in geostationary Earth orbit (GEO) have been rapidly launched to meet the growing demand for high-speed data. However, the latency of HTS remains the same as that of conventional GEO satellites due to the characteristics
Hazrul Hafiz Abdul Shukur, Yasser Asrul Ahmad, Muhammad Sharir Fathullah Mohd Yunus, Khairayu Badron   +3 more
doaj   +1 more source

TWO APPROACHES TO MEASURING THE ECONOMIC IMPACT OF STARLINK CORN ON U.S. PRODUCERS [PDF]

The discovery of StarLink corn in U.S. food products caused considerable disruption in the corn markets in 2000 and 2001. We estimated two models on the impact of StarLink corn over the 2000/2001 marketing year.
Moss, Charles B., Schmitz, Andrew, Schmitz, Troy G.   +2 more
core   +1 more source

Advocacy Coalitions and the Evolution of U.S. Space Policy: Private Companies, Competition, and Space Traffic Coordination

Politics &Policy, Volume 54, Issue 2, April 2026.
ABSTRACT This study employs advocacy coalition framework (ACF) theory to analyze debates over U.S. space policies designed to avoid dangerous collisions between objects in Earth orbit. For decades, the Department of Defense prioritized national security in its development of space traffic coordination (STC) systems like the Space Surveillance Network ...
Jeffrey S. Lantis
wiley   +1 more source