Latvian magnetic network

Paper type: 
Poster

LATVIAN MAGNETIC NETWORK

 

L.Sulakova, A.Zjatkovs

Latvian Geospatial Information Agency, Department of Geodesy and Cartography

Email: lubova.sulakova@lgia.gov.lv

 

 

In Year 2004, the Latvian Geospatial Information Agency (LGIA) has monumented repeat stations and started systematical declination and inclination measurements of the Earth’s magnetic field in Latvia.

The network of 6 repeat station points is regularly distributed all over the territory of Latvia.

6 Repeat stations are:

Aglona      N (56º 07’ 14”) E (26º 59’ 56”);  Ozolaine N (56º 25’ 41”) E (24º 30’ 17”);

Mikeltornis N (57º 35’ 50”) E (21º 58’ 56”);  Velena  N (57º 14’ 42”) E (26º 24’ 02”);

Nigrande  N (56º 29’ 26”) E (22º 05’ 08”);     Vilkene N (57º 37’ 01”) E (24º 37’ 04”);

 

In each repeat station D, I and F values have been acquired. Declination on the territory of Latvia changes from 4,5° to 7,5°in west – east direction.In measurements the magnetometer LEMI – 203 has been used together with theodolite 3T2KP and protonmagnetometer PMP 5. The coordinates of the stations were determined with two frequency (L1/L2) GPS receivers. Coordinates are used to calculate the geographical azimuth.

For reduction the data from Toravere (Estonia, near Tartu) observatory was used, where a variometer from the Nurmijervi Geophysical Observatory is located.

Repeat station points are fixed with benchmarks. Benchmarks are non-magnetic.

All data is sent to the British Geological Survey Data Center.

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