Mobility

GPS Distributed Aperture Positioning (GDAP)

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Executive Summary

The GPS signal is subject to a variety of potential degradations, such as path loss (e.g., foliated or indoor environments), multipath (e.g., urban canyon or in building), and interference (intentional or unintentional). There are many applications, both commercial and military, where a group of GPS users may operate together in a denied or degraded GPS environment. Using the traditional GPS receiver approach, individual or all users may be denied the ability to navigate in such an environment, even though each user may be intermittently receiving useful satellite signal information.

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