TY - JOUR N2 - In the paper, the variation of the intensity of the geomagnetic field force is analysed in time and space. For the research, the data from measurements of the intensity of the geomagnetic field force at four airports (Kaunas, KlaipĖ™eda, Palanga andVilnius) and 6 geomagnetic field repeat stations aswell as the data from Belsk Magnetometric Observatory (Poland) were used. For the data analysis, the theory of covariance functions was applied. The estimates of the cross-covariance functions of the measured intensity of the geomagnetic field force or the estimates of auto-covariance functions of single data were calculated according to the random functions created from the force intensity measurement data arrays. The estimates of covariance functions were calculated upon varying the quantization interval on the time scale and applying the software created using Matlab package of procedures. The impact of radars of airports on the intensity of geomagnetic field variation and on changes of their covariance functions was established. L1 - http://www.czasopisma.pan.pl/Content/111971/PDF/12_MMS-2019-2_06-12.pdf L2 - http://www.czasopisma.pan.pl/Content/111971 PY - 2019 IS - No 2 EP - 376 DO - 10.24425/mms.2019.128364 KW - geomagnetic field parameters KW - covariance function KW - quantization interval A1 - Skeivalas, Jonas A1 - Obuchovski, Romuald PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 26 DA - 2019.06.25 T1 - An analysis of variation of geomagnetic field parameters upon applying the theory of covariance functions SP - 363 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/111971 T2 - Metrology and Measurement Systems ER -