Error propagation for the Molodensky G1 term
| Autor: | J. C. McCubbine, N. J. Brown, Will Featherstone |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Propagation of uncertainty
010504 meteorology & atmospheric sciences Computation Radius 010502 geochemistry & geophysics Geodesy Grid 01 natural sciences Gravity anomaly Term (time) Geophysics Geochemistry and Petrology Computers in Earth Sciences Digital elevation model 0105 earth and related environmental sciences Free-air gravity anomaly Mathematics |
| Zdroj: | Journal of Geodesy. 93:889-898 |
| ISSN: | 1432-1394 0949-7714 |
| Popis: | Molodensky G terms are used in the computation of the quasigeoid. We derive error propagation formulas that take into account uncertainties in both the free air gravity anomaly and a digital elevation model. These are applied to generate G1 terms and their errors on a 1″ × 1″ grid over Australia. We use these to produce Molodensky gravity anomaly and accompanying uncertainty grids. These uncertainties have average value of 2 mGal with maximum of 54 mGal. We further calculate a gravimetric quasigeoid model by the remove–compute–restore technique. These Molodensky gravity anomaly uncertainties lead to quasigeoid uncertainties with a mean of 4 mm and maximum of 80 mm when propagated through a deterministically modified Stokes’s integral over an integration cap radius of 0.5°. |
| Databáze: | OpenAIRE |
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