A New Civilian GPS Frequency: What Can Surveyors Expect?

Takac, Frank; Gerdan, George P.; Lemmon, Timothy R.; Halles, Timothy A.

doi:10.1080/00050347.1998.10558719

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1998

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“…In that case the variance of the L2 carrier could well be larger than the widelane variance, since it depends on how precise the widelane can be observed. These last remarks may in fact well explain the disagreement between the empirical and formal results presented in [Takac et al, 1998]. …”

Section: Discussionmentioning

confidence: 80%

Weighting GPS Dual Frequency Observations: Bearing the Cross of Cross-Correlation

Teunissen¹,

Jonkman²,

Tiberius³

1998

GPS Solutions

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A proper choice of the observation weight matrix is of importance for both adjusting and testing GPS data. Our understanding of the noise characteristics of GPS observations, on which the weight matrix should be based, is however still underdeveloped. This makes it difficult to draw up an appropriate weight matrix. The first and foremost purpose of this contribution is therefore to draw attention to the need to improve upon our rudimentary knowledge of the GPS stochastic model. To this end, results will be presented of a relatively simple casestudy in which the possible presence of cross-correlation between observables is considered. With these results we hope to spur further discussion and research on this important topic.

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Section: Discussionmentioning

confidence: 80%