Assessment of strategies for detection and correction of cycle slips on GPS L1 observables
Main Author: | |
---|---|
Publication Date: | 2009 |
Other Authors: | , |
Format: | Article |
Language: | por |
Source: | Boletim de Ciências Geodésicas |
Download full: | https://revistas.ufpr.br/bcg/article/view/14605 |
Summary: | To prevent large errors in the GPS positioning, cycle slips should be detected and corrected. Such procedure is not trivial, mainly for single frequency receivers, but normally it is not noticed by the users. Thus, it will be discussed some practical and more used methods for cycle slips detection and correction using just GPS single-frequency observations. In the detection, the triple (TD) and tetra differences were used. In relation to the correction, in general, each slip is corrected in the pre-processing. Otherwise, other strategies should be adopted during the processing. In this paper, the option was to the second option, and two strategies were tested. In one of them, the elements of the covariance matrix of the involved ambiguities are modified and new ambiguity estimation starts. In the one, a new ambiguity is introduced as additional unknown when a cycle slip is detected. These possibilities are discussed and compared in this paper, as well as the aspects related to the practicity, implementation and viability of each one. Some experiments were carried out using simulated data with cycle slips in different satellites and epochs of the data. This allowed assessing and comparing the results of different occurrence of cycle slip and correction in several conditions. |
id |
UFPR-2_631b7ebd39a0e8a88a6c2a6743d12f2a |
---|---|
oai_identifier_str |
oai:revistas.ufpr.br:article/14605 |
network_acronym_str |
UFPR-2 |
network_name_str |
Boletim de Ciências Geodésicas |
repository_id_str |
|
spelling |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observablesAVALIAÇÃO DE ESTRATÉGIAS DE DETECÇÃO E CORREÇÃO DE PERDAS DE CICLOS NA PORTADORA GPS L1To prevent large errors in the GPS positioning, cycle slips should be detected and corrected. Such procedure is not trivial, mainly for single frequency receivers, but normally it is not noticed by the users. Thus, it will be discussed some practical and more used methods for cycle slips detection and correction using just GPS single-frequency observations. In the detection, the triple (TD) and tetra differences were used. In relation to the correction, in general, each slip is corrected in the pre-processing. Otherwise, other strategies should be adopted during the processing. In this paper, the option was to the second option, and two strategies were tested. In one of them, the elements of the covariance matrix of the involved ambiguities are modified and new ambiguity estimation starts. In the one, a new ambiguity is introduced as additional unknown when a cycle slip is detected. These possibilities are discussed and compared in this paper, as well as the aspects related to the practicity, implementation and viability of each one. Some experiments were carried out using simulated data with cycle slips in different satellites and epochs of the data. This allowed assessing and comparing the results of different occurrence of cycle slip and correction in several conditions. Para evitar grandes erros no posicionamento com GPS, as perdas de ciclos que eventualmente ocorrerem devem ser detectadas e corrigidas. Trata-se de uma etapa não trivial do processamento de dados GPS, principalmente quando envolve dados de apenas uma freqüência. Essa etapa, na maioria das vezes passa despercebido pelos usuários. Neste artigo discute-se sobre alguns métodos utilizados para detecção e correção de perdas de ciclos utilizando apenas observações de simples freqüência. Na detecção, as triplas e tetras diferenças (TD) foram utilizadas. No que concerne a correção, em geral, cada perda é corrigida no pré-processamento dos dados. Caso contrário, alguma estratégia deve ser adotada durante o processamento. Neste trabalho optou-se pela segunda opção, testando duas estratégias. Numa delas, assim que a perda de ciclos é detectada, os elementos da matriz variância e covariância (MVC) das ambigüidades envolvidas na perda são alterados e uma nova estimativa se inicia, enquanto que na outra uma nova ambigüidade é introduzida com incógnita. Essas possibilidades são discutidas e comparadas neste artigo, bem como os aspectos relacionados com praticidade, facilidade de implementação e viabilidade de cada uma delas. Foram realizados experimentos utilizando dados com perdas de ciclos simuladas em diferentes satélites e épocas envolvidas na coleta. Isso permitiu analisar e comparar os resultados das diferentes formas de correção de perdas de ciclos em diversas condições. Boletim de Ciências GeodésicasBulletin of Geodetic SciencesFAPESPMONICO, JOÃO FRANCISCO GALERADE SOUZA, ENIUCE MENEZESMACHADO, WAGNER CARRUPT2009-06-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufpr.br/bcg/article/view/14605Boletim de Ciências Geodésicas; Vol 15, No 2 (2009)Bulletin of Geodetic Sciences; Vol 15, No 2 (2009)1982-21701413-4853reponame:Boletim de Ciências Geodésicasinstname:Universidade Federal do Paraná (UFPR)instacron:UFPRporhttps://revistas.ufpr.br/bcg/article/view/14605/9803info:eu-repo/semantics/openAccess2016-06-28T15:28:53Zoai:revistas.ufpr.br:article/14605Revistahttps://revistas.ufpr.br/bcgPUBhttps://revistas.ufpr.br/bcg/oaiqdalmolin@ufpr.br|| danielsantos@ufpr.br||qdalmolin@ufpr.br|| danielsantos@ufpr.br1982-21701413-4853opendoar:2016-06-28T15:28:53Boletim de Ciências Geodésicas - Universidade Federal do Paraná (UFPR)false |
dc.title.none.fl_str_mv |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables AVALIAÇÃO DE ESTRATÉGIAS DE DETECÇÃO E CORREÇÃO DE PERDAS DE CICLOS NA PORTADORA GPS L1 |
title |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables |
spellingShingle |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables MONICO, JOÃO FRANCISCO GALERA |
title_short |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables |
title_full |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables |
title_fullStr |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables |
title_full_unstemmed |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables |
title_sort |
Assessment of strategies for detection and correction of cycle slips on GPS L1 observables |
author |
MONICO, JOÃO FRANCISCO GALERA |
author_facet |
MONICO, JOÃO FRANCISCO GALERA DE SOUZA, ENIUCE MENEZES MACHADO, WAGNER CARRUPT |
author_role |
author |
author2 |
DE SOUZA, ENIUCE MENEZES MACHADO, WAGNER CARRUPT |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
FAPESP |
dc.contributor.author.fl_str_mv |
MONICO, JOÃO FRANCISCO GALERA DE SOUZA, ENIUCE MENEZES MACHADO, WAGNER CARRUPT |
dc.subject.none.fl_str_mv |
|
description |
To prevent large errors in the GPS positioning, cycle slips should be detected and corrected. Such procedure is not trivial, mainly for single frequency receivers, but normally it is not noticed by the users. Thus, it will be discussed some practical and more used methods for cycle slips detection and correction using just GPS single-frequency observations. In the detection, the triple (TD) and tetra differences were used. In relation to the correction, in general, each slip is corrected in the pre-processing. Otherwise, other strategies should be adopted during the processing. In this paper, the option was to the second option, and two strategies were tested. In one of them, the elements of the covariance matrix of the involved ambiguities are modified and new ambiguity estimation starts. In the one, a new ambiguity is introduced as additional unknown when a cycle slip is detected. These possibilities are discussed and compared in this paper, as well as the aspects related to the practicity, implementation and viability of each one. Some experiments were carried out using simulated data with cycle slips in different satellites and epochs of the data. This allowed assessing and comparing the results of different occurrence of cycle slip and correction in several conditions. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-06-19 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufpr.br/bcg/article/view/14605 |
url |
https://revistas.ufpr.br/bcg/article/view/14605 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufpr.br/bcg/article/view/14605/9803 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Boletim de Ciências Geodésicas Bulletin of Geodetic Sciences |
publisher.none.fl_str_mv |
Boletim de Ciências Geodésicas Bulletin of Geodetic Sciences |
dc.source.none.fl_str_mv |
Boletim de Ciências Geodésicas; Vol 15, No 2 (2009) Bulletin of Geodetic Sciences; Vol 15, No 2 (2009) 1982-2170 1413-4853 reponame:Boletim de Ciências Geodésicas instname:Universidade Federal do Paraná (UFPR) instacron:UFPR |
instname_str |
Universidade Federal do Paraná (UFPR) |
instacron_str |
UFPR |
institution |
UFPR |
reponame_str |
Boletim de Ciências Geodésicas |
collection |
Boletim de Ciências Geodésicas |
repository.name.fl_str_mv |
Boletim de Ciências Geodésicas - Universidade Federal do Paraná (UFPR) |
repository.mail.fl_str_mv |
qdalmolin@ufpr.br|| danielsantos@ufpr.br||qdalmolin@ufpr.br|| danielsantos@ufpr.br |
_version_ |
1789796332884459520 |