Apparatus and method for determining receiver performance in a multilateration system
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United States of America Patent
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Apr 19, 2011
Grant Date -
Jan 29, 2009
app pub date -
May 4, 2006
filing date -
Jul 1, 2005
priority date (Note) -
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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.
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