Results 71 to 80 of about 18,971,872 (256)

Lightning electromagnetic emission location using arrival time differencing (LEELA): An introduction to the Met Office's next generation Very Low Frequency lightning location system

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
This paper describes the Met Office's new lightning location system LEELA. A brief overview of the upgraded hardware and geolocation algorithms is given. LEELA has improved lightning detection capabilities, especially at night. When comparing LEELA to the previous ATDnet system against ground truths LEELA has 100% storm detection efficiency within 5 km
Graeme Marlton   +7 more
wiley   +1 more source

Education and Understanding of Astronomy through Total Solar Eclipses

open access: yes, 2003
A total solar eclipse has a great impact on ppeople, and hence there are very old historic records in China, Mesopotamia, etc. The impact still does not change in present times, and inspires wonder in us. The spectacular and magnificent event at a total
Takahashi, Noritsugu   +2 more
core  

Sliding Mode Control in Aerospace Applications: A Survey

open access: yesInternational Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Author Correction: Ultra-high-resolution observations of persistent null-point reconnection in the solar corona

open access: yesNature Communications, 2023
X. Cheng   +23 more
doaj   +1 more source

Tuning the Legacy Survey of Space and Time Observing Strategy for Solar System Science: Incremental Templates in Year 1

open access: yesThe Astrophysical Journal Supplement Series
The Vera C. Rubin Observatory is due to commence the 10 yr Legacy Survey of Space and Time (LSST) at the end of 2025. To detect transient/variable sources and identify solar system objects (SSOs), the processing pipelines require templates of the static ...
James E. Robinson   +15 more
doaj   +1 more source

The new worlds observer: The astrophysics strategic mission concept study

open access: yesEPJ Web of Conferences, 2011
We present some results of the Astrophysics Strategic Mission Concept Study for the New Worlds Observer (NWO). We show that the use of starshades is the most effective and affordable path to mapping and understanding our neighboring planetary systems, to
Cash W.
doaj   +1 more source

Embedded Interactions and Selective Disclosure: Network Effects on Conversations aboard Skylab

open access: yesSymbolic Interaction, EarlyView.
How do absent others influence our interactions? We argue in this paper that interactions are embedded within networks formed by chains of specific relationships between known third parties. The anticipation of future interactions with external others conditions our interpretation of the current situation and affects our behavior in the interaction. We
Michael Schultz   +2 more
wiley   +1 more source

Support Services for the Laboratory for Astronomy and Solar Physics

open access: yes, 2001
This report covers software and science support activities for the Laboratory for Astronomy & Solar Physics at NASA/Goddard Space Flight ...
Cornett, Robert H., Oliversen, R.
core  

Meteorological effects of the 29 March 2025 solar eclipse over the UK

open access: yesWeather, EarlyView.
Here we present a comprehensive analysis of the effects of the moderate partial solar eclipse of 29 March 2025 on meteorological conditions over the UK, based on 1‐min‐resolution data from ~250 automatic weather stations in the Met Office's Meteorological Monitoring Network, finding a modest but nevertheless significant surface air temperature response
Edward Hanna   +4 more
wiley   +1 more source

Anthropogenic and natural factors are associated with bird dawn chorus onset in subtropical East Asia

open access: yesIbis, EarlyView.
Anthropogenic factors such as artificial lighting at night (ALAN) and natural factors including temperature and moonlight can affect the dawn chorus pattern in birds. However, most studies are conducted in temperate regions. We investigated the effect of anthropogenic and natural factors on dawn chorus timing in eight species of bird across Hong Kong ...
Ann W. Y. To, Sarah A. Collins
wiley   +1 more source

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