Spracovanie meraní s rôznou mierou neistoty
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2022-02-03
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Vysoké učení technické v Brně,Fakulta stavební
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V geodetickej praxi sa často stretávame s tým, že na bodoch geodetickej siete potrebujeme vykonať rôzne druhy geodetických meraní (z hľadiska meračských postupov aj presnosti) a v rámci procesu spracovania ich vhodne kombinovať. Najčastejšie používaná metóda najmenších štvorcov je síce jednoduchá, ale v rámci postupu spracovania kombinuje danú apriórnu presnosť meraní (jednotlivých meraní aj ich skupín) spolu s meraniami samotnými. V prípade, že apriórna presnosť jednej metódy (resp. skupiny meraní), je výrazne nadhodnotená, resp. podhodnotená voči inej metóde (skupine meraní), výsledok až tak neodzrkadľuje realitu. Metóda odhadu variančných komponentov je jedna z metód, ktorá ukazuje, ako sa s takouto situáciou vysporiadať.
In geodetic practice, we often encounter the fact that at the points of the geodetic network we need other types of geodetic measurements (in terms of measurement procedures and accuracy) and it is appropriate to combine them within the processing process. The most commonly used method of least squares is simple, but within the processing process it combines the given a priori accuracy of measurements (individual measurements and their groups) together with the measurements themselves. If the a priori uncertainty of one method (or group of measurements) is significantly overestimated, resp. underestimated against another method (group of measurements), the result does not reflect reality. The method of estimation of variance components is one of the methods that shows how to deal with such a situation.
In geodetic practice, we often encounter the fact that at the points of the geodetic network we need other types of geodetic measurements (in terms of measurement procedures and accuracy) and it is appropriate to combine them within the processing process. The most commonly used method of least squares is simple, but within the processing process it combines the given a priori accuracy of measurements (individual measurements and their groups) together with the measurements themselves. If the a priori uncertainty of one method (or group of measurements) is significantly overestimated, resp. underestimated against another method (group of measurements), the result does not reflect reality. The method of estimation of variance components is one of the methods that shows how to deal with such a situation.
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Družicové metody v geodézii a katastru 2022, s. 88-92. ISBN 978-80-86433-77-6.
http://geodesy.fce.vutbr.cz/konference/gnss-seminar/
http://geodesy.fce.vutbr.cz/konference/gnss-seminar/
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