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Dual-satellite source geolocation with time and frequency offsets and satellite location errors
2017
2017 20th International Conference on Information Fusion (Fusion)
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This measurement fusion step eliminates the time and frequency offsets while taking into account the presence of satellite location errors. ...
Achieving the maximum likelihood (ML) geolocation performance usually requires jointly estimating the source position and extra variables (i.e., time and frequency offsets as well as satellite locations ...
CONCLUSIONS We investigated the problem of dual-satellite source geolocation when time and frequency offsets between satellites and satellite location errors are present. ...
doi:10.23919/icif.2017.8009716
dblp:conf/fusion/LiuYM17
fatcat:6huhfr75j5h47mzigr3ohrtj5q
Application Of A Dual Satellite Geolocation System On Locating Sweeping Interference
2012
Zenodo
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This paper describes an application of a dual satellite geolocation (DSG) system on identifying and locating the unknown source of uplink sweeping interference. ...
The geolocation system integrates the method of joint time difference of arrival (TDOA) and frequency difference of arrival (FDOA) with ephemeris correction technique which successfully demonstrated high ...
The resulting differential time offset (DTO) gives partial location information of the interference source. Physically the two satellites are moving with respect to the ground and each other. ...
doi:10.5281/zenodo.1075968
fatcat:2vleycrehfbfnc33pa3676jeu4
Comparison of Orbit-Based and Time-Offset-Based Geometric Correction Models for SAR Satellite Imagery Based on Error Simulation
2017
Sensors
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In this regard, this paper evaluated the orbit-based and time-offset-based models with an error simulation. ...
In this regard, this study compared the so-called orbit-based and time-offset-based geometric correction models with conducting the error simulation of geolocation of the SAR satellite imagery. ...
The result implies that the accuracy of the satellite orbit information has an important role for geolocation accuracy and the orbit information determined with dual-frequency GPS signals can ensure a ...
doi:10.3390/s17010170
pmid:28106729
pmcid:PMC5298743
fatcat:f2wjshxsejb77cbhfxqbu4lsjq
Critical Analyses of Data Differences between FNMOC and AFGWC Spawned SSM/I Datasets
1998
Journal of the Atmospheric Sciences
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Antenna temperatures and the corresponding geolocation data from the five sources of the Special Sensor Microwave/Imager data from the Defense Meteorological Satellite Program F11 satellite have been characterized ...
Analyses of the geolocation data identified perturbations in the FNMOC and National Environmental Satellite, Data and Information Service data. ...
The authors thank each of the sources, FNMOC, RSS, NGDC, and NESDIS. Their cooperative attitude and help made it easy to acquire and process the data. We also thank T. ...
doi:10.1175/1520-0469(1998)055<1601:caoddb>2.0.co;2
fatcat:mdk4zyuv5jcpzkft3vswrkw37m
The NanoROLD project in the frame of the AeroClouds programme
2011
International Journal of Remote Sensing
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All these error sources amount to less than 1 km uncertainty error. ...
A third problem is the baseline length, which impacts directly on the location error. ...
doi:10.1080/01431161.2010.498450
fatcat:nk3xo472jjfdhntu34j3djzxna
ZY3-02 Laser Altimeter Footprint Geolocation Prediction
2017
Sensors
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Laser footprint location prediction is the first step in calibration that is based on ground infrared detectors, and it is difficult because the sample frequency of the ZY3-02 laser altimeter is 2 Hz, ...
Due to the influences of rocket thrust torque changes, platform vibration, external environment change, time inconsistency, atmospheric delay, and others, certain systematic errors are introduced to the ...
help about the paper structure; Xingke Fu and Xiaoming Gao gave some useful guidance and support for field test; and Xianhui Dou performed the outdoor laser detector setting tests and collected the test ...
doi:10.3390/s17102165
pmid:28934160
pmcid:PMC5677141
fatcat:declcmxgxbgtlnjcvlkj4qoekm
Improvement and Assessment of the Absolute Positioning Accuracy of Chinese High-Resolution SAR Satellites
2019
Remote Sensing
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Therefore, they cannot meet national demands for high-resolution SAR images with good geometric accuracy. ...
The absolute positioning accuracy of such satellites is important for mapping areas without ground reference points and for automated processing. ...
Author Contributions: M.D. wrote the paper and conducted the experiments. G.Z. and C.C. guided the experiments and the structure of the paper. ...
doi:10.3390/rs11121465
fatcat:urzbjalajzfsxp3ucf4sfrq2sq
A Survey for Recent Techniques and Algorithms of Geolocation and Target Tracking in Wireless and Satellite Systems
2021
Applied Sciences
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A single Radio-Frequency Interference (RFI) is a disturbance source of modern wireless systems depending on Global Navigation Satellite Systems (GNSS) and Satellite Communication (SatCom). ...
and satellite systems for geolocation and target tracking that may be extremely beneficial. ...
Even with hundreds of satellite channels and multi frequency tracking capabilities with dual code/phase positioning methods, GNSS receivers may suffer from spoofing, jamming and interference, NLOS and ...
doi:10.3390/app11136079
fatcat:6vgotxtkrjanzhu5rjh7t5rkju
Error Budget for Geolocation of Spectroradiometer Point Observations from an Unmanned Aircraft System
2018
Sensors
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Two microelectromechanical systems-based inertial measurement units (IMUs) and global navigation satellite system (GNSS) receivers were used to determine the footprint location and extent of the spectroradiometer ...
Flying height and orientation measurement accuracy had the largest influence on the geolocation uncertainty, whereas the FOV, integration time, and flying speed had the biggest impact on the size of the ...
Acknowledgments: The authors would like to acknowledge the technical work of Richard Ballard, discussion and support of Darren Turner, Colin McCoull, and Juliane Bendig. ...
doi:10.3390/s18103465
pmid:30326591
pmcid:PMC6210439
fatcat:3lmzykntpjepnkx7fh32wpsmdu
PRELIMINARY GAOFEN-3 INSAR DEM ACCURACY ANALYSIS
2018
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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We analyze the error sources of GF-3 satellite in this paper, and provide the interferometric calibration model based on range function, Doppler shift equation and interferometric phase function, and interferometric ...
GF-3 satellite, the first C band and full-polarization SAR satellite of China with spatial resolution of 1&thinsp;m, was successfully launched in August 2016. ...
frequency, which are main factors affecting the geolocation and height measurement. ...
doi:10.5194/isprs-archives-xlii-3-173-2018
fatcat:ontk7nncrbcbzku4cjmhejwm24
Improvement of Gaofen-3 Absolute Positioning Accuracy Based on Cross-Calibration
2017
Sensors
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The Chinese Gaofen-3 (GF-3) mission was launched in August 2016, equipped with a full polarimetric synthetic aperture radar (SAR) sensor in the C-band, with a resolution of up to 1 m. ...
The absolute positioning accuracy of GF-3 is of great importance, and in-orbit geometric calibration is a key technology for improving absolute positioning accuracy. ...
Absolute positioning accuracy may change with increased satellite running time. ...
doi:10.3390/s17122903
pmid:29240675
pmcid:PMC5751683
fatcat:ipmihv2dy5czdgexflefrpxcfa
Suomi NPP VIIRS prelaunch and on-orbit geometric calibration and characterization
2013
Journal of Geophysical Research - Atmospheres
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This paper describes prelaunch pointing and alignment measurements, and the two sets of on-orbit correction of geolocation errors, the first of which corrected error from 1300 m to within 75 m (20% I-band ...
Well Earth-located (geolocated) instrument data are important to retrieving accurate biogeophysical variables. ...
The authors acknowledge the sponsorship of this work by the SNPP SDS, the SNPP Project Science Office, and NOAA Center for Satellite Applications and Research (STAR), and the cooperation and assistance ...
doi:10.1002/jgrd.50873
fatcat:es4uwolrwrd65k6dcwehfyqmiq
A Low-Cost, Mobile Real-Time Kinematic Geolocation Service for Engineering and Research Applications
2021
HardwareX
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Continued technological advancements have seen the miniaturisation of electronics and antennas, coupled with an increase in the number and performance of global navigation satellite systems (GNSS) by various ...
This paper demonstrates a low-cost, mobile, real-time kinematic (RTK) geolocation service for engineering and research applications, fabricated from components readily available from commercial suppliers ...
Phillip Howard and Heinrich van Schalkwyk for their assistance with the RTK-ASM scanning of the monument and surveying of the PY slab track, respectively.
Appendix A. ...
doi:10.1016/j.ohx.2021.e00203
pmid:35607668
pmcid:PMC9123378
fatcat:rxj665bifzfg7bfakg7jwuhc4a
PRECISE 2-D AND 3-D GROUND TARGET LOCALIZATION WITH TERRASAR-X
2013
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Previous studies have demonstrated the unprecedented absolute pixel localization accuracy of the German SAR (Synthetic Aperture Radar) satellites TerraSAR-X and TanDEM-X. ...
Using globally available tropospheric and ionospheric delay information such accuracies can even be approached world-wide. ...
This allows a consistent remapping of the slant ionospheric delays that are obtained from the geometry-free linear combination of dual-frequency GNSS observations for every GNSS satellite within an epoch ...
doi:10.5194/isprsarchives-xl-1-w1-23-2013
fatcat:vdq7l6o2nja5tdrqig7nasjm44
Measurements on the Absolute 2-D and 3-D Localization Accuracy of TerraSAR-X
2018
Remote Sensing
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The German TerraSAR-X radar satellites TSX-1 and TDX-1 are well-regarded for their unprecedented geolocation accuracy. ...
A brief outlook on an upcoming further improvement in geolocation accuracy and on some first applications for precise geolocation in the area of imaging geodesy, an area brought about by the geolocation ...
Wettzell and Metsähovi, respectively, and for their local support. ...
doi:10.3390/rs10040656
fatcat:4ybpztb4zvfqhbmnqvc7h2keiu
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