Results 41 to 50 of about 12,241 (271)
Deep Learning Based Detector YOLOv5 for Identifying Insect Pests
Applied Sciences, 2022 Insect pests are a major element influencing agricultural production. According to the Food and Agriculture Organization (FAO), an estimated 20–40% of pest damage occurs each year, which reduces global production and becomes a major challenge to crop ...
Iftikhar Ahmad +7 more
doaj +1 more source
BeiDou Satellite Radiation Force Models for Precise Orbit Determination and Geodetic Applications
IEEE Transactions on Aerospace and Electronic Systems, 2021 China's BeiDou satellite navigation system (BDS) has completed its full constellation in orbit since June 2020. Services have been evolved from regional (BDS-2) to global (BDS-3).
Bingbing Duan +5 more
semanticscholar +1 more source
Research Article. Improved Dual Frequency PPP Model Using GPS and BeiDou Observations
Journal of Geodetic Science, 2017 This paper introduces a new dual-frequency precise point positioning (PPP) model, which combines GPS and BeiDou observations. Combining GPS and BeiDou observations in a PPP model offers more visible satellites to the user, which is expected to enhance ...
Afifi A., El-Rabbany A.
doaj +1 more source
, 2020 Several noteworthy breakthroughs have been made with the BeiDou Navigation Satellite System (BDS) and other global navigation satellite systems as well as the associated augmentation systems, such as the commissioning of the BDS-3 preliminary system and ...
Rui Li +6 more
semanticscholar +1 more source
Advancing the Solar Radiation Pressure Model for BeiDou-3 IGSO Satellites
Remote Sensing, 2022 In the absence of detailed surface information, empirical solar radiation pressure (SRP) models, such as the five-parameter Empirical CODE Orbit Model (ECOM1) and its extended version-ECOM2, are widely used for modeling SRP forces acting on GNSS ...
Fengyu Xia +6 more
semanticscholar +1 more source
Geodesy and Geodynamics, 2023 The space constellation of the BeiDou navigation satellite system (BDS) is a hybrid constellation containing medium earth orbit (MEO) satellites, geostationary earth orbit (GEO) satellites, and inclined geosynchronous orbit (IGSO) satellites.
Jingjing Wang, Chao Zhou, Zhixuan Sun
doaj +1 more source
BeiDou Augmented Navigation from Low Earth Orbit Satellites [PDF]
Sensors, 2019 Currently, the Global Navigation Satellite System (GNSS) mainly uses the satellites in Medium Earth Orbit (MEO) to provide position, navigation, and timing (PNT) service. The weak navigation signals limit its usage in deep attenuation environments, and make it easy to interference and counterfeit by jammers or spoofers.
Mudan Su +3 more
openaire +3 more sources
Satellite NavigationWith the rapid development of technologies such as autonomous driving and robotic navigation, the demand for accurate and reliable positioning results with BDS has increased.
Weiguang Gao +5 more
semanticscholar +1 more source
ISPRS International Journal of Geo-Information, 2016 By August 2016, 5 new-generation BeiDou satellites (BeiDou-3) have successfully been launched. The observations of a very limited number of 9 International GNSS (Global Navigation Satellite System) Monitoring and Assessment Service (iGMAS) stations and ...
Bingfeng Tan +4 more
doaj +1 more source