e-Loran-Compatible Low Probability of Intercept/Detection(LPI/D) Alternative Navigation System Navy SBIR FY2016.1 Sol No.: Navy SBIR FY2016.1 Topic No.: N161-002 Topic Title: e-Loran-Compatible Low Probability of Intercept/Detection(LPI/D) Alternative Navigation System Proposal No.: N161-002-0745 Firm: Toyon Research Corp. 6800 Cortona Drive Goleta, California 93117 Contact: Kenan Ezal Phone: (805) 968-6787 Web Site: http://www.toyon.com Abstract: The Global Positioning System (GPS), while being highly successful, has created a single point of failure for many military and civilian applications requiring precise time and position. The Long Range Navigation (LORAN) system was a proven and stable navigation aid until it was abandoned because of the success of GPS. Now it is clear that a backup to GPS is required and the enhanced-LORAN (eLORAN) system is being proposed to take over that role. During this Phase I program Toyon proposes to modify an existing auxiliary navigation system design that is currently being developed for the Navy for GPS-denied carrier landing to include the ability to receive and process eLORAN signals as well as other communication signals. The modified receivers developed on this program will be fully compatible with that system. When developed, the system will be able to make use of GPS and other Global Navigation Satellite System (GNSS) signals, as well as eLORAN, and signals-of-opportunity (SoOp). When GPS is degraded or denied, in addition to eLORAN and SoOp, the receiver will be able to process a novel navigation waveform that will be broadcast from a pseudolite-like reference system that requires only two beacons for a full navigation solution. Benefits: The system developed under this program enables accurate navigation even when GPS is denied and augments GPS when available. The low-cost system is easily deployable and the eLORAN-compatible receiver can serve as a GPS receiver when it is available. The technology is applicable to virtually any military or civilian platform that requires local precision navigation capabilities. Moreover, the system is complementary to the Joint Precision Approach and Landing System (JPALS) and can be used with or without JPALS for autonomous landing by military and civilian aircraft on land-based or sea-based landing strips. Minimizing the navigation system reliance on GPS improves the robustness of the position, velocity, attitude and time (PVAT) solution and enables a greater variety of mission profiles. Furthermore, the system is inherently robust against jamming, spoofing, repeaters, and multipath. Return