GRAVIMETRIC AND GRADIOMETRIC AIDING OF INERTIAL NAVIGATION SYSTEMS

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Authors
  1. Schwarz, K.P.
  2. Krynski, J.
  3. Wei, M.
  4. Pointon, K.W.
  5. Knickmeyer, E.T.
  6. and others
Corporate Authors
Calgary Univ, Calgary ALTA (CAN) Dept of Surveying Engineering;Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The main objective of this report is to quantify the effect of gravity induced velocity and position errors in a strapdown INS environment and to discuss operational procedures to eliminate them. There are two basic approaches to do this. In the first one, the anomalous gravity vector in the area of operation is modelled from the available gravity information and is used as input to the inertial system. With the high-order global geopotential models available today, this is a promising approach which does not require additional measurements. In the second approach the gravity vector components or gravity gradients are measured along the vessel trajectory and are used to directly update the inertial system. Both approaches will be investigated in this report.
Keywords
Gradiometers;Gradiometric
Report Number
DREO-CR-93-613 — Contract Report (Final)
Date of publication
01 Apr 1992
Number of Pages
190
DSTKIM No
97-01290
CANDIS No
501759
Format(s):
Hardcopy;Document Image stored on Optical Disk

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