Online GPS processing services: an initial study

Ghoddousi‐Fard, Reza; Dare, Peter

doi:10.1007/s10291-005-0147-5

Cited by 72 publications

(29 citation statements)

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“…The basic requirements that the user needs to take advantage of these different services are almost the same in each case: access to the Internet and a valid email address. Users send a RINEX (Receiver Independent Exchange Format) file or compressed RINEX file to the service and within a short period of time the estimated position of the GNSS system used to collect the data is sent back to the user in the form of e-mails or report files (Ghoddousi-Fard and Dare, 2006). Note that OPUS also accepts most of receiver binary format files.…”

Section: Gnss Data Processing Using Online Servicesmentioning

confidence: 99%

“…Soler et al (2006) investigated how the accuracy of derived threedimensional positional coordinates depends on the length of the observing session using OPUS. Ghoddousi-Fard and Dare (2006) compared the performance of online services by submitting different data sets varying in time and location. Liu and Shih (2007) compared five of the online services in terms of success rate, cost, length of waiting period and choice of a specific reference frame.…”

Section: Introductionmentioning

confidence: 99%

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Rapid static GNSS data processing using online services

Berber¹,

Üstün²,

Yetkin³

2014

Journal of Geodetic Science

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Abstract:Recently, many organizations have begun providing online GNSS (Global Navigation Satellite System) data processing services. Currently, only one of these organizations i.e., OPUS (On-line Positioning Users Service) provides a rapid static data processing option. In case of static online data processing, the users are required to submit at least two hours of data to get reasonably precise results. To provide processing option with less than two hours of data, NGS (National Geodetic Survey) developed OPUS-RS for rapid static data processing so that users may submit as little as 15 minutes of dual frequency GNSS data. In this study, multiple observation sessions are conducted at the same locations to compare OPUS-RS generated coordinates among the different sessions to see whether separate values agree with each other. The results indicate that with OPUS-RS results the differences in horizontal coordinates agree with each other within 3.5 cm and vertical coordinates agree within 7.2 cm. For an independent check, OPUS-RS results are also compared against LGO (Leica Geo Office) produced Static results; this comparison yielded up to 4.5 cm variations among horizontal coordinate differences and variations among vertical coordinate differences are up to 11.4 cm.

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Section: Gnss Data Processing Using Online Servicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rapid static GNSS data processing using online services

Berber¹,

Üstün²,

Yetkin³

2014

Journal of Geodetic Science

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“…As an example, Ocalan et al [9] conducted an analysis of solutions from several reference stations based on 24-hour observations with 30-second intervals. By contrast, Ghoddousi-Fard and Dare [4] analyzed the accuracy of one-and two-hour static observations by a couple of online services. However, in the work [2], rapid static models were used for various lengths of observing sessions between eight minutes to almost two hours.…”

Section: Introductionmentioning

confidence: 99%

Test of GNSS online service PPP kinematic solutions

Maciuk

Skorupa

2017

geom

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Abstract:GNSSs are widely used in engineering solutions that demand high accuracy. In areas requiring decimeter precision, Internet online post-processing services are a potential tool for developing GNSS observations. These services have been contributed by a number of organizations, providing users simple, unlimited, and (above all) free access. As a result, online services could be an alternative to complex and expensive commercial programs. Authors analyzed free public online GNSS services for post-processing kinematic 5-second observations in PPP mode with accuracy estimation.

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“…Yaygın olarak kullanılan bağıl konumlama servislerine örnek olarak OPUS, AUSPOS ve SCOUT verilebilir. Web tabanlı servislerin performanslarını test etmek amacıyla birçok çalışma yapılmıştır [1][2][3][4][5][6][7][8].…”

Section: Introductionunclassified

Opus Ve Auspos Web-Tabanli GPS Değerlendi̇rme Servi̇sleri̇ni̇n Farkli Gözlem Süreleri̇ İçi̇n Doğruluk Performanslarinin İncelenmesi̇

Alçay¹,

Imren²

2017

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZWeb-tabanlı GNSS (Küresel Navigasyon Uydu Sistemi) değerlendirme servisleri kullanıcıya yüksek duyarlıklı koordinat elde etme imkânı sunmaktadır. Bu servisler, göreli ve mutlak çözüm yaklaşımı sunan servisler olmak üzere ikiye ayrılır. Bu çalışmada göreli konumlama yaklaşımı sunan servislerden OPUS (Online Positioning User Service) ve AUSPOS (Online GPS Processing Service) GPS servislerinin statik değerlendirme performansları uzun (24 s) ve kısa (2 s) gözlem süreleri dikkate alınarak test edilmiştir. Bu amaçla dünyanın farklı coğrafi bölgelerinde bulunan 8 IGS istasyonu seçilmiştir. OPUS ve AUSPOS çözümlerinin doğruluğunu test etmek amacıyla sonuçlar, noktaların ITRF 2008 referans sistemindeki ölçü epok koordinatlarıyla karşılaştırmalı bir yaklaşımla verilmiştir. Elde edilen sonuçlar, söz konusu servisler kullanılarak, tek bir alıcı ile 24 saatlik toplanan verilerden başka hiçbir veriye gereksinim duyulmadan yer kabuğu hareketlerinin izlenmesi, yapı sağlığı izlemeleri gibi yüksek doğruluk gerektiren çalışmalar ve 2 saatlik ölçümlerin yeterli olabileceği kadastral uygulamalar gibi birçok sivil uygulamalar için yeterli olabilecek doğrulukta, oldukça, kolay ve ekonomik bir şekilde konum belirlenebileceğini göstermiştir. Anahtar Kelimeler: AUSPOS, doğruluk, ITRF, OPUS, web-tabanlı GNSS veri değerlendirme INVESTIGATION OF THE ACCURACY PERFORMANCE OF OPUS AND AUSPOS WEB-BASED GPS POSITIONING SERVICES FOR VARIOUS OBSERVATION PERIODS ABSTRACTWeb-Based GNSS (Global Navigation Satellite System) processing services provide the user to obtain precise coordinates. These services are divided into two that provide a relative and absolute positioning approach. In this study, static processing performances of OPUS (Online Positioning User Service) and AUSPOS (Online GPS Processing Service) GPS services were tested by considering the long (24 h) and short (2 h) observation periods. For this purpose 8 IGS stations, located in different geographical regions in the world were used. In order to test the accuracy of the OPUS and AUSPOS, their results were given in a comparative approach to the measurement epoch coordinates of the stations in ITRF 2008 reference system. The obtained results show that these services can be used for positioning easily and economically with accuracy, which can be sufficient for high accuracy required studies such as monitoring crustal movements, structural health monitoring using 24 hourly data with a single receiver and civil applications such as cadastral applications where 2 hourly data may be sufficient.

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Online GPS processing services: an initial study

Cited by 72 publications

References 1 publication

Rapid static GNSS data processing using online services

Rapid static GNSS data processing using online services

Test of GNSS online service PPP kinematic solutions

Opus Ve Auspos Web-Tabanli GPS Değerlendi̇rme Servi̇sleri̇ni̇n Farkli Gözlem Süreleri̇ İçi̇n Doğruluk Performanslarinin İncelenmesi̇

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