TITLE:
Efficient Harmonic Analysis Technique for Prediction of IGS Real-Time Satellite Clock Corrections
AUTHORS:
Mohamed Elsayed Elsobeiey
KEYWORDS:
Real-Time Service, Clock Prediction, Precise Point Positioning
JOURNAL NAME:
Positioning,
Vol.8 No.3,
August
30,
2017
ABSTRACT: Real-time satellite orbit
and clock corrections obtained from the broadcast ephemerides can be improved
using IGS real-time service (RTS) products. Recent
research showed that applying such corrections for broadcast ephemerides can significantly improve the RMS of the
estimated coordinates. However, unintentional streaming interruption may
happen for many reasons such as software or hardware failure. Streaming
interruption, if happened, will cause sudden
degradation of the obtained solution if only the broadcast ephemerides
are used. A better solution can be obtained in real-time if the predicted part
of the ultra-rapid products is used. In this paper, Harmonic analysis technique
is used to predict the IGS RTS corrections using historical broadcasted data.
It is shown that using the predicted clock corrections improves the RMS of the
estimated coordinates by about 72%, 58%, and 72% in latitude, longitude, and
height directions, respectively and reduces the 2D and 3D errors by about 80%
compared with the predicted part of the IGS ultra-rapid clock corrections.