Relative positioning calibration method of phase center offsets of GPS signal antennas

Phase center offset (PCO) of GPS antenna has a considerable influence on the precision and accuracy of the resulting coordinates. As joint observation mode of various GPS receivers and antennas becomes increasingly universal, efficient determination of PCO values of multi-type dual-frequency GPS receiver antennas at the same time needs to be addressed urgently. According to the property of antenna PCO, a relative positioning calibration method, which is based on GPS relative positioning survey theory, is proposed. This method only needs two steps, each being a simultaneous observation of one consecutive sidereal day for the reference antenna and the calibrated antenna. Experimental results for several widely used GPS antennas show that this method greatly improves the calibration efficiency and can estimate horizontal PCOs for both frequencies. The proposed method can be fully applied to synchronously assess PCOs of multi-type dual-frequency GPS. antennas in high precision position.

1. Schenk, V., Schenková, Z., Bosy, J., and Kontny, B., Reliability of GPS data for geodynamic studies case study: Sudeten area, The Bohemian Massif, Acta Geodyn. Geomater., 2010, vol.7, pp. 113-128.

2. Alvaro, S., Very short baseline interferometry: assessment of the relative stability of the GPS stations at the Yebes Observatory (Spain), Studia Geophysica et Geodaetica, 2013, vol. 57, no. 2, pp. 233-252.

3. Görres, B., Campbell, J., Becker, M., and Siemes, M., Absolute calibration of GPS antennas: laboratory results and comparison with field and robot techniques, GPS Solutions, 2006, vol. 10, pp. 136-145.

4. Stępniak, K., Wielgosz, P., and Baryła, R., Field tests of L1 phase centre variation models of surveying-grade GPS antennas, Studia Geophysica et Geodaetica, 2015, vol. 59, no. 3, pp. 394-408.

5. Ma, D., Study on the correction method of GNSS receiver antenna phase center error, Thesis, Chang’an University, Xi’an, China.

6. Baire, Q., Bruyninx, C., Legrand, J., Pottiaux, E., Aerts, W., Defraigne, P., Bergeot, N., and Chevalier, J. M., Influence of different GPS receiver antenna calibration models on geodetic positioning, GPS Solutions, 2014, vol. 18, no. 4, pp. 529-539.

7. Li, X., Wang, X., and Ren, J., Research on calibration methods of GNSS antenna phase center offsets and variations, Progress in Astronomy, 2012, vol. 30, no. 4, pp. 501-517.

8. Rothacher, M., Comparison of absolute and relative antenna phase center variations, GPS Solutions, 2001, vol.4, pp. 55-60.

9. Schmitz, M., Wübbena, G., and Boettcher, G., Tests of phase center variations of various GPS antennas, and some results, GPS Solutions, 2002, vol. 6, no. 1-2, pp. 18-27.

10. Aloi, D.N., Rusek, A., and Oakley, B.A., A relative technique for characterization of PCV error of large aperture antennas using GPS data, IEEE Trans. Instrum Meas., 2005, vol. 54, no.5, pp. 1820-1832.

11. Du, Q., Sun, Y., Liu, Z., Tao, P., Li, C., and Yu, F., Study on dual-frequency GPS antenna phase center stability, GNSS World of China, 2008, vol.33, no.2, pp. 6-9.