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2 Reports on Geodesy

2 Dousa J.

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GOP data center for near real-time GPS analysis

100%

Dousa J.

tom z. 2/57

149-152

The GPS meteorology - meaning the analysis of GPS data for a near real-time monitoring of the tropospheric path delays - is good example where the applications of the GPS can actually lead up to. Not only this method makes the accurate near real-time (NRT) GPS processing potentially interesting. Here, we present the topic related to any NRT analysis - NRT data supply together with the necessary products and actual site/system/product information. We call the NRT analysis here such a processing based on hourly RINEX files with results accessible within a few hours (1-3). This paper shows our motivations and ideas behind the establishment of the assistant local data center at the Geodetic Observatory Pecny (GOP LDC), ftp://pecny.asu.cas.cz/LDC/. This data center is the basis for all NRT analysing activities at the GOP analysis center (GOP AC), http://pecny.asu.cas.cz/AnalysC.html. Furthermore, we explain here the general organization, the functions and the benefits of GOP LDC in its status for February 2001.

Long-period solutions of results of the GOP EUREF local analysis center

100%

Dousa J.

tom z. 9/39

359-372

Since the end of January 1998, Geodetic Observatory Pecny (GOP) in cooperation with Department of Geodesy of the Czech Technical University in Prague operates as the tenth local analysis center (LAC) of the EUREF Permanent GPS network. More then one year analysis center GOP is producing the official weekly results in SINEX format to the BKG regional data center (IfAG). The processing period isn't too long to estimate velocities of the permanently processed stations. Nevertheless the tests of methods of combination were performed and coordinates versus coordinates and velocities estimation compared. Consequently some additional studies of influences to the GPS regional network solution and its long-period combination are provided. 0. 10' 20' ~. ~, w' ~ ~ 4 ~. 0. ~o. ~. ~. ~