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2 Networks and Data Sources
Pages 10-13

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From page 10...
... DGPS Navigation Service, which included 51 GPS reference stations transmitting differential corrections as of March 1, 1996. His overview covered network architecture, the technical characteristics of reference stations, system performance, site locations, and current operational status.
From page 11...
... Frequently, a group of researchers or a government agency develops plans to install a permanent GPS reference station in a given location, not knowing that a station is already operating a short distance away that could meet their requirements with only minor modifications Although some scientific researchers may require autonomous control of a GPS reference station and its ancillary equipment, many users only need to know how to obtain data In a timely manner, and if necessary, how to request a configuration change, such as a higher sampling rate, from the operators of existing GPS networks. However, this requires sufficient knowledge of network operations on the part of users to prevent unreasonable requests from interfering with the primary function of a network or reference station.
From page 12...
... geophysical, and atmospheric research GRAPES and Geographic Survey ~ 600/1,000 COSMOS Institute of Japan Spatial reference, Japan geodetic and geophysical research in Japan a - Lois table is not meant to represent every permanent GPS reference station network. Only the networks discussed in the papers in Chapter 7 of this report are shown.
From page 13...
... JO D^ tilt _"d~s~- ~ to ~d~ _~S~1e ~ (_- ~ ~ I^ on EMS 0.5 ~ or la. 1 cost 1 (Cam)


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