Results 41 to 50 of about 42,071 (231)

Spatial metrics in fire ecology: seeking consistency amidst complexity

open access: yesBiological Reviews, EarlyView.
ABSTRACT Technological advances, including remote sensing, have led to a proliferation of metrics used in ecological studies to examine spatial patterns of fire regimes and their ecological effects. Researchers can use many different metrics to analyse spatial variation in both fire events and resulting fire regimes, including fire size, shape ...
Alexander R. Carey   +5 more
wiley   +1 more source

Satellite antenna management system and method [PDF]

open access: yes, 1999
The antenna management system and method allow a satellite to communicate with a ground station either directly or by an intermediary of a second satellite, thus permitting communication even when the satellite is not within range of the ground station ...
Azzolini, John D, Leath, Timothy T
core   +1 more source

Trends in marine species distribution models: a review of methodological advances and future challenges

open access: yesEcography, EarlyView.
Correlative species distribution models (SDMs) are quantitative tools in biogeography and macroecology. Building upon the ecological niche concept, they correlate environmental covariates to species presence to model habitat suitability and predict species distributions.
Moritz Klaassen   +3 more
wiley   +1 more source

Research and realization of automated test system for satellite batch production

open access: yesDianzi Jishu Yingyong, 2023
In order to solve the problems of large quantity of mass satellite production, short cycle, and shortage of personnel, a new type of satellite automatic test system is proposed.
Yuan Jianfu   +5 more
doaj   +1 more source

Fully automatic telemetry data processor [PDF]

open access: yes, 1968
Satellite Telemetry Automatic Reduction System /STARS 2/, a fully automatic computer-controlled telemetry data processor, maximizes data recovery, reduces turnaround time, increases flexibility, and improves operational efficiency.
Cox, F. B., Keipert, F. A., Lee, R. C.
core   +1 more source

An Integrated Framework for Sensing Radio Frequency Spectrum Attacks on Medical Delivery Drones

open access: yes, 2020
Drone susceptibility to jamming or spoofing attacks of GPS, RF, Wi-Fi, and operator signals presents a danger to future medical delivery systems. A detection framework capable of sensing attacks on drones could provide the capability for active responses.
Kulp, Philip H., Mei, Nagi
core   +1 more source

Digital Twin‐Based Optimization of Service Availability in LEO Mega Constellations Considering Handover Delays in Open RAN

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT As non‐terrestrial networks (NTNs) become integral to future 6G systems, ensuring seamless connectivity and service continuity over low Earth orbit (LEO) satellite constellations is essential. This work investigates the impact of open radio access network (RAN) functional splits on handover performance in NTNs, focusing on minimizing service ...
Siva Satya Sri Ganesh Seeram   +3 more
wiley   +1 more source

Analysis of space weather and small satellite data in polar orbit using machine learning [PDF]

open access: yesE3S Web of Conferences
This publication explores the dependencies between factors of space weather (geomagnetic indices Dst, Kp, and Ap, Wolf solar activity index, and solar wind parameters) and the telemetry of the small satellite Cubebel-1.
Listov Dmitriy, Aleshko Roman
doaj   +1 more source

Unique Post-telemetry Recapture Enables Development of Multi-Element Isoscapes From Barnacle Shell for Retracing Host Movement

open access: yesFrontiers in Marine Science, 2020
Many ecological investigations rely on understanding the movement of animals through marine environments. Most available tracking techniques are invasive (e.g., tissue sampling) and require extensive effort and/or cost (e.g., capture-mark-recapture or ...
Ryan M. Pearson   +4 more
doaj   +1 more source

Perspectives on the Special Issue for Applications of Remote Sensing for Livestock and Grazingland Management

open access: yesRemote Sensing, 2022
The use of geospatial sciences and technologies for the management of grazinglands has fostered a plethora of applications related to ecology, wildlife, vegetation science, forage productivity and quality, and animal husbandry.
Edward C. Rhodes   +3 more
doaj   +1 more source

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