Local Statistical Testing in Quality Control of GNSS Observations
The paper discusses GNSS statistical-testing methods for detection and identifications of observation outliers at the estimation "current" epoch, defined here as local testing. First, detection methods are discussed including testing the probability distribution (likelihood) of the residua...
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| Format: | Journal Article |
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International Association of Chinese Professionals in Global Positioning Systems (CPGPS)
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/36328 |
| _version_ | 1848754738399543296 |
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| author | El-Mowafy, Ahmed |
| author_facet | El-Mowafy, Ahmed |
| author_sort | El-Mowafy, Ahmed |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The paper discusses GNSS statistical-testing methods for detection and identifications of observation outliers at the estimation "current" epoch, defined here as local testing. First, detection methods are discussed including testing the probability distribution (likelihood) of the residuals, testing using dynamic control limits of the range, the mean and standard deviation of the residuals. A method is proposed examining the difference between the mean and the median of the residuals. To identify the satellites with faulty measurements, several methods were investigated, including checking the likelihood of the residuals at the present epoch, and in a time series. A test is presented utilizing the control limits of the residuals' moving range for each satellite. Testing of the proposed methods was carried out using only GPS phase measurements in the kinematic mode. Results show that the proposed methods are efficient for detection and identification of large errors/outliers. However, the performance degrades with error values less than 5 cycles and when using small significance levels. |
| first_indexed | 2025-11-14T08:45:11Z |
| format | Journal Article |
| id | curtin-20.500.11937-36328 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:45:11Z |
| publishDate | 2010 |
| publisher | International Association of Chinese Professionals in Global Positioning Systems (CPGPS) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-363282017-09-13T15:52:52Z Local Statistical Testing in Quality Control of GNSS Observations El-Mowafy, Ahmed Statistical Testing Positioning GNSS Quality Control The paper discusses GNSS statistical-testing methods for detection and identifications of observation outliers at the estimation "current" epoch, defined here as local testing. First, detection methods are discussed including testing the probability distribution (likelihood) of the residuals, testing using dynamic control limits of the range, the mean and standard deviation of the residuals. A method is proposed examining the difference between the mean and the median of the residuals. To identify the satellites with faulty measurements, several methods were investigated, including checking the likelihood of the residuals at the present epoch, and in a time series. A test is presented utilizing the control limits of the residuals' moving range for each satellite. Testing of the proposed methods was carried out using only GPS phase measurements in the kinematic mode. Results show that the proposed methods are efficient for detection and identification of large errors/outliers. However, the performance degrades with error values less than 5 cycles and when using small significance levels. 2010 Journal Article http://hdl.handle.net/20.500.11937/36328 10.5081/jgps.9.1.12 International Association of Chinese Professionals in Global Positioning Systems (CPGPS) fulltext |
| spellingShingle | Statistical Testing Positioning GNSS Quality Control El-Mowafy, Ahmed Local Statistical Testing in Quality Control of GNSS Observations |
| title | Local Statistical Testing in Quality Control of GNSS Observations |
| title_full | Local Statistical Testing in Quality Control of GNSS Observations |
| title_fullStr | Local Statistical Testing in Quality Control of GNSS Observations |
| title_full_unstemmed | Local Statistical Testing in Quality Control of GNSS Observations |
| title_short | Local Statistical Testing in Quality Control of GNSS Observations |
| title_sort | local statistical testing in quality control of gnss observations |
| topic | Statistical Testing Positioning GNSS Quality Control |
| url | http://hdl.handle.net/20.500.11937/36328 |