Low-Altitude Ion Heating, Downflowing Ions, and BBELF Waves in the Return Current Region: LOW-ALTITUDE ION HEATING
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Geophysical Research"
DOI: 10.1002/2017ja024955
Abstract: Heavy (O+) ion energization and field-aligned motion in and near the ionosphere are still not well understood. Based on observations from the CASSIOPE Enhanced Polar Outflow Probe (e-POP) at altitudes between 325 km and 730… read more here.
Keywords: low altitude; ion heating; field; altitude ion ... See more keywords
Close up observation and inversion of low-altitude ENA emissions during a substorm event
Sign Up to like & getrecommendations! Published in 2019 at "Science China Earth Sciences"
DOI: 10.1007/s11430-018-9307-x
Abstract: During a series of substorm events on November 12 2004, the Neutral Atom Detector Unit (NUADU) flying onboard the TC-2 spacecraft observed, close to perigee, bright low-altitude Energetic Neutral Atom (ENA) emissions from both north… read more here.
Keywords: ena emissions; low altitude; inversion; high temporal ... See more keywords
Design of low-altitude Martian orbits using frequency analysis
Sign Up to like & getrecommendations! Published in 2021 at "Advances in Space Research"
DOI: 10.1016/j.asr.2020.10.032
Abstract: Abstract Nearly-circular Frozen Orbits (FOs) around axisymmetric bodies — or, quasi-circular Periodic Orbits (POs) around non-axisymmetric bodies — are of primary concern in the design of low-altitude survey missions. Here, we study very low-altitude orbits… read more here.
Keywords: low altitude; frequency analysis; altitude; altitude martian ... See more keywords
Estimates of plant density of wheat crops at emergence from very low altitude UAV imagery.
Sign Up to like & getrecommendations! Published in 2017 at "Remote Sensing of Environment"
DOI: 10.1016/j.rse.2017.06.007
Abstract: Abstract Plant density is useful variable that determines the fate of the wheat crop. The most commonly used method for plant density quantification is based on visual counting from ground level. The objective of this… read more here.
Keywords: low altitude; plant; wheat; method ... See more keywords
Could Low-Altitude Reconnection Power Jupiter’s Polar Aurorae?
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DOI: 10.1029/2021eo163348
Abstract: Magnetic reconnection events less than 2 Jovian radii above the planet’s cloud tops could explain why Juno has yet to observe a source for Jupiter’s polar aurore. read more here.
Keywords: low altitude; altitude reconnection; jupiter polar; could low ... See more keywords
Altitude and Concussions in the NFL: Is There Really a “Mile-High” Effect?
Sign Up to like & getrecommendations! Published in 2019 at "Archives of Clinical Neuropsychology"
DOI: 10.1093/arclin/acz026.29
Abstract: The literature on altitude and concussions in football shows some evidence of protective effects of living and training and playing at high altitudes. We explored the likelihood of sustaining concussions within the AFC West division,… read more here.
Keywords: altitude versus; altitude; concussion; versus low ... See more keywords
Measurement-Based Characterization and Modeling for Low-Altitude UAV Air-to-Air Channels
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2929955
Abstract: In this paper, we characterize the unmanned aerial vehicle (UAV) air-to-air (A2A) channel for an 802.11-based low altitude network based on a preliminary measuring result over user datagram protocol (UDP) throughput, latency, received signal strength… read more here.
Keywords: uav air; altitude; air air; loss ... See more keywords
Recent Research Progress of Unmanned Aerial Vehicle Regulation Policies and Technologies in Urban Low Altitude
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DOI: 10.1109/access.2020.2987622
Abstract: With the rapid expansion in the number of Unmanned Aircraft Vehicles (UAVs) available and the development of modern technologies, the commercial applications of UAVs in urban areas, such as urban remote sensing (RS), express services,… read more here.
Keywords: altitude; airspace; air; low altitude ... See more keywords
Study on Composite Electromagnetic Scattering Characteristics of Low-Altitude Target Above Valley Composite Rough Surface Using Hybrid SBR-EEC Method
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.2987651
Abstract: The composite electromagnetic (EM) scattering characteristics of low-altitude target above valley composite rough surface are studied. The composite rough surface modeling theory is adopted to simulate the natural cavity structure of valley environment. Aiming at… read more here.
Keywords: target valley; method; altitude target; target ... See more keywords
Low-Altitude Target Detection Method Based on Distributed Sensor Networks
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3177655
Abstract: With the widespread application of low-altitude targets, it is absolutely necessary to monitor and control their use. The effective detection of targets is the basis for such control, and existing detection methods are still inadequate… read more here.
Keywords: low altitude; method based; detection method; detection ... See more keywords
A Non-Stationary 3-D Wideband Channel Model for Low Altitude UAV-MIMO Communication Systems
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Internet of Things Journal"
DOI: 10.1109/jiot.2021.3108411
Abstract: In this paper, a non-stationary three-dimensional (3-D) wideband geometry-based stochastic model (GBSM) is proposed for low altitude unmanned aerial vehicle (UAV) multiple-input multiple-output (MIMO) communication systems. The proposed GBSM is a combination of line-of-sight (LoS)… read more here.
Keywords: low altitude; mimo communication; far mpcs; non stationary ... See more keywords