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Prospects for gradiometric aiding of inertial survey systems

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Abstract

The state of current and proposed moving-base gravity gradiometer instruments is briefly reviewed. The review perspective is directed toward their deployment as a source of additional gravimetric data during inertial surveys. In such gradiometer-aided surveys, the additional gravity gradient information could be used to:

  1. Improve surveyed gravity vector accuracy

  2. Extend the interval between zero velocity update stops

  3. Accomplish varying combinations of the above.

The paper examines potential survey improvements associated with gradiometers having noise levels observed in laboratory prototypes. The additional improvements possible with future gradiometers are also discussed. These results are interpreted in light of present and likely future inertial survey system technology.

Sommaire

L’état des gradiomètres actuels à base mobile est brièvement passé en revue. La perspective est dirigée vers leur utilisation comme une source additionnelle de données gravimétriques durant les arpentages intertiels. Dans le but d’aider ces arpentages, de tels gradiomètres peuvent fournir de l’information concernant le gradient de gravité pour:

  1. améliorer la précision du vecteur de gravité mesuré,

  2. augmenter l’intervalle entre les arrêts de vitesse nulle,

  3. accomplir des combinaisons variées des points ci-dessus.

Cette communication examine les améliorations potentielles de l’arpentage associé aux gradiomètres prototypes ayant les niveaux de bruit de fond observés en laboratoire. Les améliorations additionnelles possibles avec les futurs gradiomètres sont aussi discutées. Ces résultats sont interprétés à la lumière de la technologie inertielle présente et probable du futur.

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References

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Heller, W.G. Prospects for gradiometric aiding of inertial survey systems. Bull. Geodesique 55, 354–369 (1981). https://doi.org/10.1007/BF02527058

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  • DOI: https://doi.org/10.1007/BF02527058

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