Results 121 to 130 of about 95,672 (234)

Lightning mapping system [PDF]

open access: yes
A Lightning Detection and Ranging (LDAR) System is being implemented at KSC in Florida. The first operational use is expected in the late summer of 1991.
Lennon, C., Maier, L.
core   +1 more source

Improving Aerosol Absorption Estimates Via Size‐Resolved Constraints Based on AERONET and In Situ Measurements

open access: yesGeophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Accurate aerosol particle size distribution is essential for estimating radiative forcing but is often hindered by assumptions that oversimplify more physical approximations of aerosol mixing state and size. This work performs a single‐site observational‐closure study that combines AERONET multi‐wavelength extinction and absorption retrievals,
Luoyao Guan   +5 more
wiley   +1 more source

Characterization and Localization of Chemical Explosions and Lightning Flashes by a Flotilla of Stratospheric Balloons

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 5, 16 March 2026.
Abstract On 3 August 2021, a flotilla of four Heliotrope solar hot air balloons was launched from central New Mexico (USA). The balloons, equipped with microbarometers, flew from sunrise to sunset at altitudes between 17 and 22 km. During the flight, eight chemical explosions ranging from 45 to 136 kg TNT equivalent and a thunderstorm occurred in the ...
T. Farges   +5 more
wiley   +1 more source

Research on indoor positioning system algorithm based on UWB technology

open access: yesMeasurement: Sensors
Ultra wideband (UWB) indoor positioning technology is attracting significant attention in the present realm of indoor wireless positioning technology due to its numerous advantages, including low energy consumption, exceptional wireless transmission ...
Weimin Ma   +3 more
doaj   +1 more source

Rainfall and Rain‐on‐Snow Events Over Greenland in Summer: Climatology, Trends, Synoptics

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 5, 16 March 2026.
Abstract Rain‐on‐snow (ROS) events in the Arctic can lead to major impacts on the snow cover, cryosphere and environment. During the last decades, these events have significantly increased, mostly due to climate change. Here, we use outputs from the regional climate model MAR (version 3.14) driven by the ERA5 reanalysis at 10‐km resolution over ...
Emilie Frame   +7 more
wiley   +1 more source

Geometrical statistical channel model with an Inverted-Parabolic spatial distribution

open access: yesTongxin xuebao, 2014
Due to the complexity of calculation for the parameters of angle of arrival(AOA),time of arrival(TOA) and Dopplerspectra(DS),etc.,a proper geometrical statistical channel model was proposed with inverted-parabolic spatial distribution around mobile ...
Jie ZHOU, Dong-dong XU, Kikuchi HISAKAZU
doaj   +2 more sources

Robust Indoor Positioning with Smartphone by Utilizing Encoded Chirp Acoustic Signal

open access: yesSensors
Recently, indoor positioning has been one of the hot topics in the field of navigation and positioning. Among different solutions on indoor positioning, positioning with acoustic signals has its promise due to its relatively high accuracy in the line of ...
Bingbing Cheng, Ying Huang, Chuanyi Zou
doaj   +1 more source

Fingerprint localization based on hybrid TOA, AOA, and RSS measurements

open access: yesDiscover Applied Sciences
This paper presents a novel joint TOA-AOA-RSS fingerprint localization method aimed at reducing the necessity for collecting extensive fingerprint data for database construction.
Shuiwei Liu, Lei Tang, Zhangsheng Wang
doaj   +1 more source

An indoor positioning system based on distributed LTE network

open access: yesDianxin kexue, 2018
Indoor positioning technology has important applications in the business and security fields,but there are still existing problems with low positioning accuracy and high deployment costs.An indoor positioning system based on long term evolution ( LTE ...
Yu YANG, Ming CHEN, Daqing LIU
doaj   +2 more sources

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