Results 41 to 50 of about 843 (194)

Evaluation of GPS PDOP from elevation and azimuth of satellites [PDF]

, 1996
110-113Evaluation of position dilution of precision (PDOP) is very important for optimum selection of visible GPS satellites in order to get good accuracy I position fixing.
Banerjee, P, Bose, Anindya
core  

Mean static horizontal position accuracy, PDOP, and signal-to-noise values for the Flint GNSS receiver in the coniferous stand (n = 30).

, 2015
a Root mean squared errorb Circular error probable 50c Positional dilution of precisiond Carrier-to-noise densityMean static horizontal position accuracy, PDOP, and signal-to-noise values for the Flint GNSS receiver in the coniferous stand (n = 30).
Zennure Ucar (731822), Krista Merry (731824), Pete Bettinger (731823), Steven A. Weaver (731821)   +3 more
core   +1 more source

Assessment of BeiDou-3 and Multi-GNSS Precise Point Positioning Performance

Sensors, 2019
With the launch of BDS-3 and Galileo new satellites, the BeiDou navigation satellite system (BDS) has developed from the regional to global system, and the Galileo constellation will consist of 26 satellites in space. Thus, BDS, GPS, GLONASS, and Galileo
Guoqiang Jiao, Shuli Song, Yulong Ge, Ke Su, Yangyang Liu   +4 more
doaj   +1 more source

New Strategy for Improving the Accuracy of Aircraft Positioning Based on GPS SPP Solution

Sensors, 2020
The paper describes and presents a new calculation strategy for the determination of the aircraft’s resultant position using the GPS (Global Positioning System) SPP (Single Point Positioning) code method.
Kamil Krasuski, Adam Ciećko, Mieczysław Bakuła, Damian Wierzbicki   +3 more
doaj   +1 more source

Multistatic Frequency and Polarimetry Adaptive Autofocus for Synthetic Aperture Radar Imaging of a Moving Target

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This paper presents a multistatic, frequency‐ and polarimetry‐adaptive autofocus algorithm (F‐Pol) for SAR imaging of moving targets undergoing complex, six‐degrees‐of‐freedom (6‐DoF) motion. Building on Localised Threshold Sharpness (LTS), the method exploits agreement across frequency sub‐bands and polarisation channels to improve pulse‐by‐pulse ...
Anmol Rattan, Daniel Andre, Mark Finnis
wiley   +1 more source

Mean static horizontal position accuracy, PDOP, and signal-to-noise values for the Flint GNSS receiver in the second study, under leaf-off conditions (n = 30).

, 2015
a Root mean squared errorb Circular error probable 50c Positional dilution of precisiond Carrier-to-noise densityMean static horizontal position accuracy, PDOP, and signal-to-noise values for the Flint GNSS receiver in the second study, under leaf-off ...
Zennure Ucar (731822), Krista Merry (731824), Pete Bettinger (731823), Steven A. Weaver (731821)   +3 more
core   +1 more source

Polydopamine interface encapsulating graphene and immobilizing ultra-small, active Fe3O4 nanoparticles for organic dye adsorption

, 2021
In this study, a combined process of bio-inspired modification and magnetic treatment is presented for the preparation of a polydopamine (Pdop)-modified graphene (Pdop-G)-based adsorbent which incorporates ultra small, active Fe3O4 nanoparticles (with an
Wang, Xiaowen, Shan, Rui, Hu, Huawen, Zhang, Yuyuan   +3 more
core   +1 more source

Multi-Layer LEO Constellation Optimization for GLONASS Augmentation: Geometric Complementarity and Rapid PPP Convergence

Applied Sciences
The GLONASS constellation suffers from inherent geometric weaknesses in mid–low latitude regions, where uneven satellite elevation distribution leads to degraded PDOP and limits high-precision positioning performance.
Hao Xu, Ming Ma, Ronghua Zhang, Yingang Liu   +3 more
doaj   +1 more source

Screening and Identification of Diesel Biodegrading Bacteria Isolated From Petroleum Hydrocarbon Contaminated Garage Soils of Kericho County, Kenya

International Journal of Microbiology, Volume 2026, Issue 1, 2026.
Despite the benefits of petroleum hydrocarbon as essential raw energy sources in many industries, they cause major global environmental pollution. Petroleum hydrocarbons pollutants are highly toxic and recalcitrant, making them dangerous and persistent over long periods in an ecosystem.
Zeddy Yegon, John M. Wagacha, Evans Nyaboga, Richard Chalo, Eliud Wafula, Diriba Muleta   +5 more
wiley   +1 more source

A study on GPS PDOP and its impact on position error [PDF]

, 1997
107-111It is well established that 3-dimensional position error in position fix through GPS network should increase with PDOP value provided the range error estimates remain constant. To study this aspect an elaborate experimental observation was carried
Banerjee, P, Bose, Anindya, Mathur, B S
core