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Globalne prognozowanie

Nastula Jolanta, Czekaj Damian

Geodeta : magazyn geoinformacyjny

2021

nr 11

15--17

CBK PAN liderem

Geodeta : magazyn geoinformacyjny

2021

nr 11

14--16

UT1 prediction based on long-time series analysis

Tissen V., Tolstikov A., Malkin Z.

Artificial Satellites : Journal of Planetary Geodesy

2010

Vol. 45, No. 2

111--118

A new method is developed for prediction of UT1. The method is based on construction of a general polyharmonic model of the Earth rotation parameters variations using all the data available for the last 80-100 years, and modified autoregression technique. A rigorous comparison of UT1 predictions computed at SNIIM with the prediction computed by IERS (USNO) in 2008-2009 has shown that proposed method provides better accuracy both for ultra-short and long term predictions.

Ultra-rapid dut1-observations with e-VLBI

Haas R., Sekido M., Hobiger T., Kondo T., Kurihara S., Tanimoto D., Kokado K., Wagner J., Ritakari J., Mujunen A.

Artificial Satellites : Journal of Planetary Geodesy

2010

Vol. 45, No. 2

75--79

We give a short overview about the achievements of the FennoscandianJapanese ultra-rapid dUT1-project that was initiated in early 2007. The combination of real-time data transfer, near real-time data conversion and correlation, together with nearreal time data analysis allows to determine dUT1 with a very low latency of less than 5 minutes after the end of a VLBI-session. The accuracy of these ultra-rapid dUT1-results is on the same order than the results of the standard rapid-service of the International Earth Rotation and Reference Frame Service (IERS). The ultra-rapid approach is currently extended to 24 hour sessions and is expected to become an important contribution for the future next generation VLBI system called VLBI2010.

Future of Earth orientation predictions

Luzum B.

Artificial Satellites : Journal of Planetary Geodesy

2010

Vol. 45, No. 2

107--110

Earth orientation prediction has undergone a number of changes over the last few decades in response to changing conditions in the Earth orientation parameter user community. However, considering the recent pace of change, it is likely that the rate at which innovations are introduced into the prediction process will increase. Potential drivers for change are discussed and possible directions for change are outlined.