Comparison and Assessment of Float, Fixed, and Smoothed Precise Point Positioning
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025615%3A_____%2F20%3AN0000011" target="_blank" >RIV/00025615:_____/20:N0000011 - isvavai.cz</a>
Result on the web
<a href="https://www.irsm.cas.cz/materialy/acta_content/2020_doi/Vaclavovic_AGG_2020_0024.pdf" target="_blank" >https://www.irsm.cas.cz/materialy/acta_content/2020_doi/Vaclavovic_AGG_2020_0024.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.13168/AGG.2020.0024" target="_blank" >10.13168/AGG.2020.0024</a>
Alternative languages
Result language
angličtina
Original language name
Comparison and Assessment of Float, Fixed, and Smoothed Precise Point Positioning
Original language description
Precise Point Positioning (PPP) has been considered a powerful method for GNSS data processing. The essential input products, such as precise satellite orbits and clocks, are provided within the International GNSS Service (IGS) with a sufficient quality for estimating receiver coordinates with centimeter level accuracy. However, the IGS satellite clocks enable users to estimate ambiguities only as float values. An additional product for satellite phase biases is necessary for an integer ambiguity resolution (PPP AR). Another approach is the backward smoothing algorithm utilizing already precise and converged parameters for improving those parameters estimated at previous epochs. All the three approaches for ambiguity estimation are compared and assessed in terms of advantages and disadvantages, achieved coordinates precision, and flexibility. The comparison are performed through a processing of GNSS data from selected IGS permanent stations during 30 days in 2018, and a processing of high rate GNSS observations of the station STRF in Greece collected during the seismic event occurred on October 25, 2018. The backward smoothing improved the float solution similarly like the PPP AR, and therefore can be considered an alternative approach providing easier implementation and no dependency on additional satellites products. We utilized two different products for phase biases in the PPP AR, namely Integer Recovery Clocks (IRC) provided by the Centre National d'Etudes Spatiales/Collecte Localisation Satellites (CNES/CLS) analyses center and Fractional Cycle Biases (FCB) which were estimated at the Geodetic Observatory Pecny (GOP) analyses. The IRC is based on the assimilation phase biases into satellite clocks, while the FCB products are distributed in terms of wide-lane and narrow-lane biases. A similar accuracy obtained from our comparison indicates an interoperability of products when using different strategies and even different software.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
—
Continuities
O - Projekt operacniho programu
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACTA GEODYNAMICA ET GEOMATERIALIA
ISSN
1214-9705
e-ISSN
—
Volume of the periodical
17
Issue of the periodical within the volume
3
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
12
Pages from-to
329-340
UT code for WoS article
000575734300006
EID of the result in the Scopus database
2-s2.0-85092132744