Showing 621 - 640 results of 653 for search '"fixed-wing"', query time: 0.11s Refine Results
  1. 621
  2. 622

    Monitoring Geomorphic Change and Catchment Sediment Production to Understand the Erosive Dynamics in a Gullied Channel by Means of High-Resolution DEMs by Alberto Alfonso-Torreño, Álvaro Gómez-Gutiérrez, Susanne Schnabel, J. Francisco Lavado Contador, Manuel Pulido Fernández, Jesús Barrena-González

    Published 2020-05-01
    “…The methodology included the following steps: (1) flying the same study area with different time periods using a fixed-wing small Unmanned Aerial System (sUAS) to capture high-resolution aerial images and surveying Ground Control Points (GCPs) using a GNSS, (2) Structure-from-Motion photogrammetry processing using the acquired images and the GCPs to produce high-resolution DEMs for each date, (3) Applying the DEMs of difference approach to estimate topographic changes and to quantify the sediment budget and finally (4) analyzing the relationship between rainfall events, discharge, sediment load and changes in the channel previously estimated. …”
    Get full text
    Article
  3. 623
  4. 624

    Precision Soil Moisture Monitoring With Passive Microwave L-Band UAS Mapping by Kyung Y. Kim, Ziyue Zhu, Runze Zhang, Bin Fang, Michael H. Cosh, Andrew L. Russ, Eryan Dai, Jack Elston, Maciej Stachura, Albin J. Gasiewski, Venkataraman Lakshmi

    Published 2024-01-01
    “…We offer one of the very first validation studies on a dry-down event captured by a novel L-band radiometer onboard a Black Swift Technologies fixed-wing S2 UAS. A fallow cornfield at the Beltsville Agricultural Research Center was selected as a study area to validate volumetric soil moisture estimates in mid-April. …”
    Get full text
    Article
  5. 625
  6. 626
  7. 627

    Observations of the lower atmosphere from the 2021 WiscoDISCO campaign by P. A. Cleary, G. de Boer, G. de Boer, G. de Boer, J. P. Hupy, S. Borenstein, J. Hamilton, J. Hamilton, B. Kies, D. Lawrence, R. B. Pierce, J. Tirado, A. Voon, T. Wagner

    Published 2022-05-01
    “…During the 2021 Wisconsin's Dynamic Influence of Shoreline Circulations on Ozone (WiscoDISCO-21) campaign, two UAS platforms, a fixed-wing (University of Colorado RAAVEN) and a multirotor (Purdue University DJI M210), were used simultaneously to capture lake breeze during forecasted high-ozone events at Chiwaukee Prairie State Natural Area in southeastern Wisconsin from 21–26 May 2021​​​​​​​. …”
    Get full text
    Article
  8. 628

    A Parsimonious Approach to Estimate Soil Organic Carbon Applying Unmanned Aerial System (UAS) Multispectral Imagery and the Topographic Position Index in a Heterogeneous Soil Lands... by Marc Wehrhan, Michael Sommer

    Published 2021-09-01
    “…In our case study we tested a fixed-wing UAS equipped with visible and near infrared (VIS-NIR) sensors to estimate topsoil SOC distribution at two fields under the constraint of limited sampling points, which were selected by pedological knowledge. …”
    Get full text
    Article
  9. 629

    A Lightweight Remote Sensing Payload for Wildfire Detection and Fire Radiative Power Measurements by Troy D. Thornberry, Ru-Shan Gao, Steven J. Ciciora, Laurel A. Watts, Richard J. McLaughlin, Angelina Leonardi, Karen H. Rosenlof, Brian M. Argrow, Jack S. Elston, Maciej Stachura, Joshua Fromm, W. Alan Brewer, Paul Schroeder, Michael Zucker

    Published 2023-03-01
    “…The system has been successfully operated for fire observations using a Black Swift Technologies S2 small, fixed-wing UAS for flights over a prescribed grassland burn in Colorado and onboard an NOAA Twin Otter crewed aircraft over several western US wildfires during the 2019 Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) field mission.…”
    Get full text
    Article
  10. 630

    Unmanned Aerial Systems (UAS)-Based Methods for Solar Induced Chlorophyll Fluorescence (SIF) Retrieval with Non-Imaging Spectrometers: State of the Art by Juan Quirós Vargas, Juliane Bendig, Alasdair Mac Arthur, Andreas Burkart, Tommaso Julitta, Kadmiel Maseyk, Rick Thomas, Bastian Siegmann, Micol Rossini, Marco Celesti, Dirk Schüttemeyer, Thorsten Kraska, Onno Muller, Uwe Rascher

    Published 2020-05-01
    “…The latest approach focuses on the observation of one single ground point across a multiple-kilometer atmosphere vertical column using the high altitude UAS named as AirFloX, mounted on a specifically designed and manufactured fixed wing platform: ‘FloXPlane’. We present technical details and preliminary results obtained from each instrument, a summary of their main characteristics, and finally the remaining challenges and open research questions are addressed. …”
    Get full text
    Article
  11. 631
  12. 632

    Tree species classification using UAS-based digital aerial photogrammetry point clouds and multispectral imageries in subtropical natural forests by Zhong Xu, Xin Shen, Lin Cao, Nicholas C. Coops, Tristan R.H. Goodbody, Tai Zhong, Weidong Zhao, Qinglei Sun, Sang Ba, Zhengnan Zhang, Xiangqian Wu

    Published 2020-10-01
    “…In this study, we acquired high spatial resolution multispectral and RGB imagery over a subtropical natural forest in southwest China using a fixed-wing UAV system. Digital aerial photogrammetric (DAP) technique was used to generate multi-spectral and RGB derived point clouds, upon which individual tree crown (ITC) delineation algorithms and a machine learning classifier were used to identify dominant tree species. …”
    Get full text
    Article
  13. 633

    UAV PHOTOGRAMMETRY FOR MAPPING AND MONITORING OF NORTHERN PERMAFROST LANDSCAPES by R. H. Fraser, I. Olthof, M. Maloley, R. Fernandes, C. Prevost, J. van der Sluijs

    Published 2015-08-01
    “…This gap can be filled to a certain extent using helicopter or fixed-wing aerial surveys, but at a cost that is often prohibitive. …”
    Get full text
    Article
  14. 634
  15. 635
  16. 636
  17. 637

    The role of seasonal migration in the near-total loss of caribou on south-central Canadian Arctic Islands by Frank L. Miller, Samuel J. Barry, Wendy A. Calvert

    Published 2007-04-01
    “…In our examination of the survey results, we could find no reason to question that the calculated population estimates were not reasonable approximations. The fixed-wing aerial surveys in 1980 (Gunn & Decker, 1984), 1985 (Gunn & Ashevak, 1990), and 1995 (Gunn & Dragon, 1998) were highly comparable, well designed and executed, using standard procedures for a fixed-width, strip-transect, systematic aerial survey of caribou. …”
    Get full text
    Article
  18. 638

    UAVs Task and Motion Planning in the Presence of Obstacles and Prioritized Targets by Yoav Gottlieb, Tal Shima

    Published 2015-11-01
    “…The intertwined task assignment and motion planning problem of assigning a team of fixed-winged unmanned aerial vehicles to a set of prioritized targets in an environment with obstacles is addressed. …”
    Get full text
    Article
  19. 639

    Hand lauched UAV by Anthony Jhoni

    Published 2018
    “…Therefore, in this project the design development will encompass foldable fix wing UAV platform and ground-based propulsion. …”
    Get full text
    Final Year Project (FYP)
  20. 640

    Fault Tolerant Control of Drone Interceptors Using Command Filtered Backstepping and Fault Weighting Dynamic Control Allocation by Biao Xu, Qingfeng Ma, Jianxin Feng, Jinpeng Zhang

    Published 2023-02-01
    “…This paper proposes a fault tolerant control strategy for drone interceptors with fixed wings and reaction jets subject to actuator faults. …”
    Get full text
    Article