Comparison of GPS tropospheric delays derived from two consecutive EPN reprocessing campaigns from the point of view of climate monitoring - Publikacja - MOST Wiedzy

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Comparison of GPS tropospheric delays derived from two consecutive EPN reprocessing campaigns from the point of view of climate monitoring

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The main purpose of this research was to acquire information about consistency of ZTD (zenith total delay) linear trends and seasonal components between two consecutive GPS reprocessing campaigns. The analysis concerned two sets of the ZTD time series which were estimated during EUREF (Reference Frame Sub-Commission for Europe) EPN (Permanent Network) reprocessing campaigns according to 2008 and 2015 MUT AC (Military University of Technology Analysis Centre) scenarios. Firstly, Lomb–Scargle periodograms were generated for 57 EPN stations to obtain a characterisation of oscillations occurring in the ZTD time series. Then, the values of seasonal components and linear trends were estimated using the LSE (least squares estimation) approach. The Mann–Kendall trend test was also carried out to verify the presence of linear long-term ZTD changes. Finally, differences in seasonal signals and linear trends between these two data sets were investigated. All these analyses were conducted for the ZTD time series of two lengths: a shortened 16-year series and a full 18-year one. In the case of spectral analysis, amplitudes of the annual and semi-annual periods were almost exactly the same for both reprocessing campaigns. Exceptions were found for only a few stations and they did not exceed 1 mm. The estimated trends were also similar. However, for the reprocessing performed in 2008, the trends values were usually higher. In general, shortening of the analysed time period by 2 years resulted in a decrease of the linear trends values of about 0.07mm yr-1. This was confirmed by analyses based on two data sets.

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Autorzy (5)

  • Zdjęcie użytkownika  Zofia Baldysz

    Zofia Baldysz

    • Wojskowa Akademia Techniczna
  • Zdjęcie użytkownika dr inż. Grzegorz Nykiel

    Grzegorz Nykiel dr inż.

    • Wojskowa Akademia Techniczna
  • Zdjęcie użytkownika  Andrzej Araszkiewicz

    Andrzej Araszkiewicz

    • Wojskowa Akademia Techniczna
  • Zdjęcie użytkownika prof. dr hab. inż. Mariusz Figurski

    Mariusz Figurski prof. dr hab. inż.

    • Wojskowa Akademia Techniczna
  • Zdjęcie użytkownika  Karolina Szafranek

    Karolina Szafranek

    • Wojskowa Akademia Techniczna

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Wersja publikacji
Accepted albo Published Version
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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
Atmospheric Measurement Techniques nr 9, wydanie 9, strony 4861 - 4877,
ISSN: 1867-1381
Język:
angielski
Rok wydania:
2016
Opis bibliograficzny:
Baldysz Z., Nykiel G., Araszkiewicz A., Figurski M., Szafranek K.: Comparison of GPS tropospheric delays derived from two consecutive EPN reprocessing campaigns from the point of view of climate monitoring// Atmospheric Measurement Techniques. -Vol. 9, iss. 9 (2016), s.4861-4877
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.5194/amt-9-4861-2016
Weryfikacja:
Politechnika Gdańska

wyświetlono 177 razy

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