Results 21 to 30 of about 3,063 (257)

RPC-Based Orthorectification for Satellite Images Using FPGA

open access: yesSensors, 2018
Conventional rational polynomial coefficients (RPC)-based orthorectification methods are unable to satisfy the demands of timely responses to terrorist attacks and disaster rescue.
Rongting Zhang   +4 more
doaj   +1 more source

A globally asymptotically stable polynomial vector field with rational coefficients and no local polynomial Lyapunov function [PDF]

open access: yesSystems & Control Letters, 2018
We give an explicit example of a two-dimensional polynomial vector field of degree seven that has rational coefficients, is globally asymptotically stable, but does not admit an analytic Lyapunov function even locally.
Amir Ali Ahmadi, Bachir El Khadir
openaire   +3 more sources

Optical satellite sensor and positioning accuracy analysis for the Hongqi-1-H9 wide-range satellite in different terrains

open access: yesEURASIP Journal on Wireless Communications and Networking, 2021
The excellent performance of geometric positioning of a newly launched satellite will greatly broaden its application field. Launched on January 15, 2020, the Hongqi-1-H9 wide-range satellite is the largest sub-meter-level satellite worldwide and the ...
Wenping Song   +6 more
doaj   +1 more source

Sums of squares of polynomials with rational coefficients [PDF]

open access: yesJournal of the European Mathematical Society, 2016
We construct families of explicit (homogeneous) polynomials f over \mathbb Q that are sums of squares of polynomials over \
openaire   +3 more sources

Improvement and Assessment of Gaofen-3 Spotlight Mode 3-D Localization Accuracy

open access: yesRemote Sensing, 2023
The spotlight image acquired by the Gaofen-3 satellite has a resolution of 1 m, which has great potential for 3-D localization. However, there have been no public reports on the 3-D localization accuracy evaluation of Gaofen-3 spotlight synthetic ...
Nuo Chen   +4 more
doaj   +1 more source

CALIBRATION AND VALIDATION OF THE ADVANCED LAND OBSERVING SATELLITE-3 “ALOS-3” [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
The “Advanced Land Observing Satellite-3” (ALOS-3, nicknamed “DAICHI-3”) is the next high-resolution optical mission as a successor of the optical mission by the Advanced Land Observing Satellite (ALOS, “DAICHI”) in Japan Aerospace Exploration Agency ...
T. Tadono   +5 more
doaj   +1 more source

Approximation by rational functions with polynomials of positive coefficients as the denominators

open access: yesAnalysis in Theory and Applications, 2006
Summary: The present paper proves that if \(f(x)\in C_{[0,1]}\), changes its sign exactly \(l\) times at \(0< y_1 ...
Yu, Dansheng, Zhou, Songping
openaire   +1 more source

SARPointNet: An Automated Feature Learning Framework for Spaceborne SAR Image Registration

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Accurate registration between synthetic aperture radar (SAR) images is the basis for high-precision geometric correction of SAR images. The feature points extracted by conventional feature extraction methods are unsatisfactory, which are affected by ...
Xin Li   +6 more
doaj   +1 more source

Bias Compensation for Rational Polynomial Coefficients of High-Resolution Satellite Imagery by Local Polynomial Modeling [PDF]

open access: yesRemote Sensing, 2017
The Rational Function Model (RFM) is a widely used generic sensor model for georeferencing satellite images. Owing to inaccurate measurement of satellite orbit and attitude, the Rational Polynomial Coefficients (RPCs) provided by image vendors are commonly biased and cannot be directly used for high-precision remote-sensing applications. In this paper,
Xiang Shen   +3 more
openaire   +2 more sources

Mathematical Modeling and Accuracy Testing of WorldView-2 Level-1B Stereo Pairs without Ground Control Points

open access: yesRemote Sensing, 2017
With very high resolution satellite (VHRS) imagery of 0.5 m, WorldView-2 (WV02) satellite images have been widely used in the field of surveying and mapping.
Jiang Ye, Xu Lin, Tao Xu
doaj   +1 more source

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