James T. Miller and Eugene W. G. David

Peer Reviewed

Abstract: The registration of data received from remote units or other facilities with surveillance data derived from a unit’s own organic sensors (principally radars) is called gridlocking. This function is fundamental to the successful employment of the external data for coordinating a ship’s activities with other units or forces and cueing the unit to possible threats. Accurate registration requires precise knowledge of the relationship between the ownship-derived data and the remote data. This relationship depends partially on knowing positions for the sensors which developed the various data. Because of the presence of sensor biases, the positions which provide the most accurate registration often do not correspond to the true geodetic position of the receiving unit and/or the remote sensors. Depending on the overlap between the remote sensor coverage volume and local ownship coverage volume, it can be shown that the role of navigation in developing this registration varies. Recent investigations, utilizing various data bases collected simultaneously from multiple physically separated naval radar suites, have shown that precise alignments can be achieved with minimal or, in some cases, no navigational input as long as common targets are held by the radar suites (i.e., relative gridlocking). Extension of these results to cases where no common coverage region exists (i.e., geodetic gridlocking) indicates that navigational positions from cooperative units within the local unit coverage volume could provide a possible standard for defining the relationship between ownship sensor coordinates and the absolute navigational coordinates. If the remote sensor data are also aligned to absolute coordinates, precise registration can then be achieved even in these cases.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 30, Number 2
Pages: 123 - 134
Cite this article: Miller, James T., David, Eugene W. G., "THE ROLE OF NAVIGATION IN THE PRECISION REGISTRATION OF SENSOR DATA AT SEA", NAVIGATION, Journal of The Institute of Navigation, Vol. 30, No. 2, Summer 1983, pp. 123-134.
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