Regional GNSS measurements in Kyrgyzstan in 2021.

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   This year, employees of GPS laboratory (RS RAS) conducted routine field measurements of the Kyrgyz GPS network sites based on the Global Navigation Satellite Systems (GNSS) method. Annual repeated surveys of the same GPS sites on the study area allow to fix the high-precision position of the site at the measurement time and to track the multi-year rate of its displacement to solve fundamental geodynamic problems, as well as to assess the danger of the population and vital objects.

   From May to September 2021, two campaigns (KGS21a from 25.05.2021 to 25.06.2021; KGS21b from 17.08.2021 to 15.09.2021) were carried out for measure regional sites on the territory of Kyrgyzstan (Fig.1).


Figure 1 - Regional marks at which GNSS measurements were taken in 2021: yellow triangles are marks installed earlier and measured in the current year (116); green pluses and numbers are new marks installed on already existing sites (2); red circles are sites not measured due to lack of access roads, bridges, bad weather conditions, etc. (2).

   Four field brigades participated in these campaigns, including an operator and a driver of a ZIL-131 truck. During a month, each team measures 14-15 sites, 36 hours for measuring each site. The mileage of each vehicle is 1200-2000 km.


   Till 2020 the employees of the GPS Laboratory conducted measurements mainly with the Topcon Legacy-E instruments, which allow fixing the signals of GPS and GLONASS satellite systems. In the current year the works are carried out with the use of new generation devices of Russian production MR-8, which in addition to the 2 main ones are able to record additional information from the Beidou (China) and SBAS (Satellite Based Augmentation System) systems. These devices are much lighter and more compact, have an integrated design of the receiver with the antenna (Fig.2).


Figure 2 - GNSS receiver MR-8 under field regional measurements 2021:

a) on a threaded mark of IV18 site with pin support and controller; b) on the point-hole mark of KURV site with a rack-and-pinion support.
   Additional input GNSS information and processing with various methodological settings in GAMIT/GLOBK and Bernese GNSS Software will improve the accuracy of positioning and velocity of multi-year motion of a surface benchmark.


Geographic location

40 km. from Bishkek