Application-driven critical values for GNSS ambiguity acceptance testing

Sandra Verhagen*, Peter J G Teunissen, Jingyu Zhang

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


Integer ambiguity estimation and validation are crucial steps when solving the carrierphase based GNSS model. For the validation, different ambiguity acceptance tests have been proposed. For those tests often fixed critical values are used, with the important disadvantage that the performance of the tests varies a lot depending on measurement set-up and circumstances. Therefore it is better to use model-driven critical values such that it is guaranteed that the failure rate will not exceed a user-defined threshold. This contribution will study the model-dependency of the critical values for two well known acceptance tests, the ratio test and difference test, and then specifically for a given application. This means that mainly the satellite-receiver geometry and number of epochs will be variable. It will be shown that critical values do exhibit a strong dependence on these factors, and it will not be possible to simply use a fixed (i.e., constant) application-driven critical value.

Original languageEnglish
Title of host publicationIAG 150 Years - Proceedings of the 2013 IAG Scientific Assembly
PublisherSpringer Science+Business Media
Number of pages7
ISBN (Print)9783319246031
Publication statusPublished - 2016
Event150th Anniversary with a Scientific Assembly, IAG 2013 - Potsdam, Germany, Potsdam, Germany
Duration: 2 Sep 20136 Sep 2013


Conference150th Anniversary with a Scientific Assembly, IAG 2013
Abbreviated titleIAG 2013


  • Critical value
  • Integer acceptance test
  • Model-dependency


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