Abstract.
A detailed treatment of adjustment problems in combined global positioning system (GPS)/levelling/geoid networks is given. The two main types of `unknowns' in this kind of multi-data 1D networks are usually the gravimetric geoid accuracy and a 2D spatial field that describes all the datum/systematic distortions among the available height data sets. An accurate knowledge of the latter becomes especially important when we consider employing GPS techniques for levelling purposes with respect to a local vertical datum. Two modelling alternatives for the correction field are presented, namely a pure deterministic parametric model, and a hybrid deterministic and stochastic model. The concept of variance component estimation is also proposed as an important statistical tool for assessing the actual gravimetric geoid noise level and/or testing a priori determined geoid error models. Finally, conclusions are drawn and recommendations for further study are suggested.
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Received: 9 September 1998 / Accepted: 8 June 1999
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Kotsakis, C., Sideris, M. On the adjustment of combined GPS/levelling/geoid networks. Journal of Geodesy 73, 412–421 (1999). https://doi.org/10.1007/s001900050261
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DOI: https://doi.org/10.1007/s001900050261