Results 121 to 130 of about 5,886 (223)

OFT ascent/descent ancillary data requirements document [PDF]

Requirements are presented for the ascent/descent (A/D) navigation and attitude-dependent ancillary data products to be generated for the space shuttle orbiter in support of orbital flight test requirements, MPAD guidance and navigation performance ...
Abramson, B., Bond, A. C., Jr.
core   +1 more source

An Interferometric Synthetic Aperture Radar Tropospheric Delay Correction Method Based on a Global Navigation Satellite System and a Backpropagation Neural Network: More Suitable for Areas with Obvious Terrain Changes. [PDF]

Sensors (Basel), 2023
Qiu L, Chen P, Yao Y, Chen H, Tang F, Xiong M.   +5 more
europepmc   +1 more source

Preliminary analysis of several microwave landing system flare elevation configurations [PDF]

Configurations of MLS Flare Elevation Systems that can be considered reasonable and practical in actual implementation are identified. Each of these are analyzed and compared with respect to (1) computational requirement, (2) required coverage, and (3 ...
Goka, T.
core   +1 more source

An optimized BP neural network for modeling zenith tropospheric delay in the Chinese mainland using coupled particle swarm and genetic algorithm

Geo-spatial Information Science
Tropospheric delay influences high-precision navigation positioning and precipitable water vapor retrieval with the Global Navigation Satellite System (GNSS).
Liangke Huang, Haohang Bi, Hongxing Zhang, Shitai Wang, Fasheng Liao, Lilong Liu, Weiping Jiang   +6 more
doaj   +1 more source

Analysis of Spatial Decorrelation of Small-Scale Tropospheric Delay Using High-Resolution NWP Data. [PDF]

Sensors (Basel), 2023
Håkegård JE, Sokolova N, Morrison A.
europepmc   +1 more source

Methods and Evaluation of AI-Based Meteorological Models for Zenith Tropospheric Delay Prediction

Remote Sensing
Zenith Tropospheric Delay (ZTD) is a significant error source affecting the accuracy of certain space geodetic measurements. This study evaluates the performance of Artificial Intelligence (AI) based meteorological models, such as Fengwu and Pangu, in ...
Si Xiong, Jiamu Mei, Xinchuang Xu, Ziyu Shen, Liangke Huang   +4 more
doaj   +1 more source

Multi-GNSS-Weighted Interpolated Tropospheric Delay to Improve Long-Baseline RTK Positioning. [PDF]

Sensors (Basel), 2022
Mirmohammadian F, Asgari J, Verhagen S, Amiri-Simkooei A.   +3 more
europepmc   +1 more source

Evaluation of InSAR Tropospheric Delay Correction Methods in the Plateau Monsoon Climate Region Considering Spatial-Temporal Variability. [PDF]

Sensors (Basel), 2023
Yang Q, Zuo X, Guo S, Zhao Y.
europepmc   +1 more source

Ingestion of GNSS-Derived ZTD and PWV for Spatial Interpolation of PM_2.5 Concentration in Central and Southern China. [PDF]

Int J Environ Res Public Health, 2021
Wei P, Xie S, Huang L, Liu L.
europepmc   +1 more source

A novel hybrid model for hourly PM2.5 prediction considering air pollution factors, meteorological parameters and GNSS-ZTD

Environmental Modelling & Software, 2023
Fanming Wu, Pengfei Min, Yan Jin, Kenan Zhang, Hongyu Liu, Jumin Zhao, Deng-ao Li   +6 more
semanticscholar   +1 more source