EW 104: Electronic Warfare Against a New Generation of Threats (EW100) by Adamy David L

Author:Adamy, David L. [Adamy, David L.]
Language: eng
Format: azw3
Publisher: Artech House Publishers
Published: 2015-01-31T16:00:00+00:00

Figure 6.42Two precision emitter location sites determine a mathematically defined locus of possible emitter locations from analysis of the same signal as received at two emitter location sites that are distant from one another.

(RMS Error)2 = (Standard Deviation)2 + (Mean Error)2

Thus, if the mean error is mathematically removed, the RMS error equals the standard deviation from the true angle of arrival. If the causes of errors can be considered normally distributed, the standard deviation is 34%. Thus, as shown in Figure 6.43, the RMS error lines describe an area around the true line of bearing that have a 68% chance of containing any measured angle of arrival. Looking at this a different way, it means that if the system measures a specific angle, there is a 68% chance that the true emitter location is within the wedge-shaped area shown. This assumes that the measured mean error has been removed during data processing.

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