The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2011
Filed:
May. 04, 2006
James Joseph Fisher, Romsey, GB;
Philip Edward Roy Galloway, Romsey, GB;
Timothy John Quilter, Romsey, GB;
Robert John Weedon, Romsey, GB;
James Joseph Fisher, Romsey, GB;
Philip Edward Roy Galloway, Romsey, GB;
Timothy John Quilter, Romsey, GB;
Robert John Weedon, Romsey, GB;
Roke Manor Research Limited, Romsey, GB;
Abstract
In a multilateration system receivers are grouped into two groups. The first group is used to determine a position of a signal source, for example, an aircraft equipped with a SAR transponder. From the determined position, predicted time of arrival values are produced for the second group receivers. These are compared with the actual time of arrival values for the signals arriving at the second group receivers. A difference is determined and then the variation of that difference is determined as the aircraft travels in its track. The groupings are then varied and further variations determined. When the minimum variation is determined an alert is given that the second group has a receiver which is operating with a larger than desirable group time delay.