Estimation accuracy analysis of zenith tropospheric delays obtained by precise point positioning technique

DOI: 10.34759/trd-2020-110-15

Аuthors

Valaitite A. A.

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

e-mail: alinavalaytite@gmail.com

Abstract

At present, the number of application domains of global navigation satellite system (GNSS) receivers increased. Besides the tasks requiring high precision positioning such as geodesy, navigation, autonomous control of equipment, navigation data is used to such atmospheric parameters monitoring as integral water vapor content, pressure, tropopause height. Another example of the GNSS employing receiver, beyond the tasks associated with the consumer positioning, is track delay integration, obtained from the receiver with microwave radiometer measurements with the view of high-precision estimation of the tropospheric delay wet component for altimetry products

An accurate calculation of the values of zenith tropospheric delays can be obtained by the Precise Point Positioning (PPP) technique. PPP technique is a secondary measurement processing method allowing achieve centimeter positioning accuracy with a single GNSS receiver. The values of zenith tropospheric delays (ZTD) herewith will be estimated directly in the Kalman filter with the rest unknown values such as position, clock offsetting and velocity.

Due to the growing interest in this positioning technique, associated mainly with the possibility of its application in various fields, many ready-made algorithms for its implementation exist, both as online services and as software packages.

This article presents a comparative analysis of estimates accuracy of zenith tropospheric delays obtained by navigation measurements processing from the four ground-base stations of the International IGS network with three software products, namely gLAB, CSRS-PPP and MagicGNSS.

Zenith tropospheric delays estimated by this means were compared with reference tropospheric delays in the “*.zpd” format, provided by the International GNSS service.

The presented study revealed two basic tendencies. Firstly, it was found that MagicGNSS and CSRS-PPP software products allowed obtaining ZTD estimates rather close to the IGS tropospheric product value. Secondly, the dependence between the time of year and zenith tropospheric determining delay accuracy was revealed.

Keywords:

global navigation satellite system (GNSS), precise point positioning technique, zenith tropospheric delay, CSRS-PPP, gLAB program, magicGNSS program

References

1. Perov A.I., Kharisov V.N. GLONASS. Printsipy postroeniya i funktsionirovaniya (GLONASS. Principles of foorming and operation), Moscow, Radiotekhnika, 2010, 800 p.

2. Chukin V.V., Aldoshkina E.S., Vakhnin A.V., Kanukhina A.Yu., Mel’nikova O.A. Uchenye zapiski Rossiiskogo gosudarstvennogo gidrometeorologicheskogo universiteta, 2010, no. 12, pp. 51 – 60.

3. Jerrett D., Nash J. Potential Uses of Surface Based GPS Water Vapour Measurements for Meteorological Purposes, Physics and Chemistry of the Earth Part A Solid Earth and Geodesy, 2001, no. 26, pp. 457 – 461. DOI: 10.1016/S1464-1895(01)00083-7

4. Fernandes J., Lazaro C., Ablain M., Pires N. Improved wet path delays for all ESA and reference altimetric missions, Remote Sensing Environment, 2015, vol. 169, pp. 50 – 74. DOI: 10.1016/j.rse.2015.07.023

5. Nikitin D.P., Valaitite A.A. Elektrosvyaz’, 2016, no. 11, pp. 12 – 17.

6. Valaitite A.A., Nikitin D.P. Trudy MAI, 2015, no. 82, available at: http://trudymai.ru/eng/published.php?ID=58806

7. Dawidowicz K., Krzan G. Coordinate estimation accuracy of static precise point positioning using on-line PPP service, a case study, Acta Geodaetica et Geophysica Hungarica, 2014, no. 49 (1), pp. 37 – 55. DOI: 10.1007/s40328-013-0038-0

8. Dembelov M.G., Ovdin M.E. Vlagosoderzhanie troposfery nad punktom nablyudeniya Ust’-Barguzin, Izvestiya Irkutskogo gosudarstvennogo universiteta, 2019, no. 27, pp. 32 – 45.

9. Lei Yang et al. Numerical Weather Prediction Based Troposphere Correction for Real Time Precise Point Positioning, Geo-spatial Information Science, 2013, no. 16, pp. 186 – 200.

10. Nikitin. D.P. Telekommunikatsii, 2012, no. 6, pp. 8 – 33.

11. Nikitin D.P., Valaitite A.A. Elektrosvyaz’, 2016, no. 11, pp. 18 – 24.

12. GPS Satellite Ephemerides. Satellite & Station Clocks. In IGS Products, available at: http://igs.org/products

13. Wolfgang R. Dick, Daniela Thaller. IERS Annual Report 2017. International Earth Rotation and Reference Systems Service, Central Bureau, 2017, 207 p.

14. Agapov R.V., Shirokii S.M., Titov E.V. Trudy Instituta prikladnoi astronomii RAN, 2017, no. 42, pp. 3 – 10.

15. Huang C-Y., Liou Y-A., Chiang C-C., Lin Y-J. Reconstruction of 3-D Wet Refractivity Structure of the Troposphere Using Simulated GPS Measurements, Journal Photogrammetry and Remote Sensing, 2005, no. 10, available at:
    

    https://www.researchgate.net/publication/267413602_Reconstructing_3D_wet_refractivity_structures_of_the_lower_troposphere_from_GPS_measurements

16. Vovasov V.E., Betanov V.V., Gerko S.A. Trudy MAI, 2015, no. 79, available at: http://trudymai.ru/eng/published.php?ID=55831

17. Ashraf Farah. Accuracy assessment study of UNB3m neutral atmosphere model for global tropospheric delay mitigation, Journal Artificial Satellites, 2015, vol. 50, no. 4. DOI: 10.1515/arsa-2015-0016

18. Leandro R., Santos M., Langley R. UNB Neural Atmosphere Models, Proceedings of the 2006 National Technical Meeting of the Institute of Navigation, Monterey, CA, January 2006, pp. 564 – 573.

19. Bohm J. et al. Development of an improved empirical model for slant delays in the troposphere, GPS Solution, 2015, vol. 19, pp. 433 – 441.

20. Hurter F., Maier O. Tropospheric profiles of wet refractivity and humidity from the combination of remote sensing data sets and measurements on the ground, Atmospheric Measurement Techniques, 2013, 6 (3), pp. 4895 – 4940. DOI: 10.5194/amtd-6-4895-2013

21. Podkorytov A.N. Trudy MAI, 2012, no. 59, available at: http://trudymai.ru/eng/published.php?ID=34845

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