TELKOMNIKA Telecommunication, Computing, Electronics and Control
Quality control in GNSS reflectometry method for tide observations

TELKOMNIKA Telecommunication, Computing, Electronics and Control
Quality control in GNSS reflectometry method for tide observations

Control quality
GNSS-R
Periodogram
Tide

Recently, the reflected signals from global navigation satellite systems
(GNSS) have been utilized to observe coastal tides, and it has been found
that this method provides promising results. Although this method is
promising, there remain problems related to accuracy of the observed tides.
The purpose of this study was to improve the accuracy by employing an
optimal spectral method in the quality control scheme. The quality control
process is carried out by setting parameters to achieve the best possible
frequency correlated with sea levels such as estimation of the noise
frequency range, frequency amplitude power selection, and selection of peak
frequency to noise ratio. The results using the data at Morotai station showed
that the amplitude power less than 5 comes from low-frequency signals and
hence it is an indicator that the Lomb-Scargle periodogram (LSP) fails to
determine the dominant frequency. In addition, the result of the peak
frequency to noise ratio shows a value of 2.7, meaning that the peak
frequency of the LSP signal is at least 2.7 times greater than the signal noise.
Quality control sensitivity settings are very effective in determining the
reflectors height coming from the sea level. The periodogram visualization
can be used to decide which LSP is significant.

Agung Syetiawan, Dudy Darmawan Wijaya, Irwan Meilano

http://journal.uad.ac.id/index.php/TELKOMNIKA

Oct 19, 2021

peri irawan

pdf

english

text