The Exploration of Satellite Clock and Ephemeris Error Correction in Wide Area Differential System

2012 ◽  
pp. 583-592 ◽  
Author(s):  
ChengLin Cai ◽  
XiaoHui Li ◽  
HaiTao Wu
Keyword(s):  
Error Correction ◽  
Differential System ◽  
Wide Area ◽  
Satellite Clock

A satellite clock error correction method in the wide area differential system

2009 ◽  
Vol 54 (24) ◽  
pp. 4616-4623 ◽  
Author(s):  
ChengLin Cai ◽  
XiaoHui Li ◽  
HaiTao Wu ◽  
XingWang Chang
Keyword(s):  
Error Correction ◽  
Differential System ◽  
Correction Method ◽  
Wide Area ◽  
Satellite Clock ◽  
Clock Error ◽  
Error Correction Method ◽  
Satellite Clock Error

scholarly journals Picturing Extreme Programming and Public-Private Key Pairs

2019 ◽  
Vol 8 (9S3) ◽  
pp. 826-830
Keyword(s):  
Fault Tolerance ◽  
Error Correction ◽  
Forward Error Correction ◽  
Wide Area ◽  
Extreme Programming ◽  
Byzantine Fault Tolerance ◽  
Private Key ◽  
Byzantine Fault ◽  
Recent Advances ◽  
Forward Error

Recent advances in authenticated technology and perva-sive configurations have paved the way for SCSI disks. After years of compelling research into Byzantine fault tolerance, we validate the refinement of wide-area net-works. In order to achieve this aim, we concentrate our efforts on disconfirming that forward-error correction and RAID can collude to realize this purpose.

Beidou wide-area augmentation system clock error correction and performance verification

2020 ◽  
Vol 65 (10) ◽  
pp. 2348-2359
Author(s):  
Jiu-Long Liu ◽  
Yue-Ling Cao ◽  
Xiao-Gong Hu ◽  
Cheng-Pan Tang
Keyword(s):  
Error Correction ◽  
Wide Area ◽  
Performance Verification ◽  
Clock Error ◽  
System Clock ◽  
Wide Area Augmentation System ◽  
And Performance

Wide Area Differential GPS Field Study

1994 ◽  
Vol 47 (2) ◽  
pp. 146-158
Author(s):  
Ivan Catchpole ◽  
Peter Upton ◽  
Andrew Sinclair ◽  
Jim Nagle
Keyword(s):  
Field Study ◽  
Wide Area ◽  
Model Parameters ◽  
Atmospheric Effects ◽  
Differential Gps ◽  
Satellite Clock ◽  
Ocean Region ◽  
Representative Model ◽  
Phase Data ◽  
Collection Sites

Inmarsat commissioned the field study to be carried out by Signal Computing Ltd. in association with the Royal Greenwich Observatory. The study aimed to identify the commercial suitability of Wide Area Differential GPS (WADGPS) corrections. The corrections provided to users will be relayed via Inmarsat-3 geostationary satellites and are required to be valid over the footprint of an entire Inmarsat ocean region (approximately one third of the Earth's surface).The study has been conducted within the Inmarsat Atlantic Ocean Region East. Trials took place over a five-month period to achieve a representative set of data. Six widely-distributed collection sites were used to ensure that the maximum duration of satellite data were received and that a representative model for atmospheric effects was obtained. Analysis is restricted to the use of GPS carrier and phase data obtained using the C/A code transmitted by Block II satellites only.This paper presents the analysis of data collected during a four-day trial period. The ability to determine the GPS satellite ephemeris (independent of GPS broadcast ephemeris), Klobuchar model parameters tailored to the oceanic region, and satellite clock corrections using GPS data obtained from this limited deployment of collection sites is addressed. The primary degradation effects on stand-alone GPS positioning of Selective Availability (SA) are corrected using WADGPS, resulting in a significant improvement in position accuracy.

Algorithms for automated montage synthesis of images from laser-scanning confocal microscopes

1995 ◽  
Vol 53 ◽  
pp. 650-651
Author(s):  
D. E. Becker
Keyword(s):  
Image Analysis ◽  
High Resolution ◽  
Laser Scanning ◽  
Cell Counting ◽  
Wide Area ◽  
Data Set ◽  
Computational Synthesis ◽  
Automated Cell Counting ◽  
Partial View ◽  
The Individual

An efficient, robust, and widely-applicable technique is presented for computational synthesis of high-resolution, wide-area images of a specimen from a series of overlapping partial views. This technique can also be used to combine the results of various forms of image analysis, such as segmentation, automated cell counting, deblurring, and neuron tracing, to generate representations that are equivalent to processing the large wide-area image, rather than the individual partial views. This can be a first step towards quantitation of the higher-level tissue architecture. The computational approach overcomes mechanical limitations, such as hysterisis and backlash, of microscope stages. It also automates a procedure that is currently done manually. One application is the high-resolution visualization and/or quantitation of large batches of specimens that are much wider than the field of view of the microscope.The automated montage synthesis begins by computing a concise set of landmark points for each partial view. The type of landmarks used can vary greatly depending on the images of interest. In many cases, image analysis performed on each data set can provide useful landmarks. Even when no such “natural” landmarks are available, image processing can often provide useful landmarks.

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