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| Titel |
On the issues of probability distribution of GPS carrier phase observations |
| VerfasserIn |
X. Luo, M. Mayer, B. Heck |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250023249
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| Zusammenfassung |
| In common practice the observables related to Global Positioning System (GPS) are assumed
to follow a Gauss-Laplace normal distribution. Actually, full knowledge of the observables’
distribution is not required for parameter estimation by means of the least-squares algorithm
based on the functional relation between observations and unknown parameters as well as the
associated variance-covariance matrix. However, the probability distribution of GPS
observations plays a key role in procedures for quality control (e.g. outlier and
cycle slips detection, ambiguity resolution) and in reliability-related assessments of
the estimation results. Under non-ideal observation conditions with respect to the
factors impacting GPS data quality, for example multipath effects and atmospheric
delays, the validity of the normal distribution postulate of GPS observations is in
doubt.
This paper presents a detailed analysis of the distribution properties of GPS carrier phase
observations using double difference residuals. For this purpose 1-Hz observation data from
the permanent SAPOS |
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