The Anti-jam GPS Receiver (AGR) designed by Raytheon supports the Tactical Tomahawk missile program. The system uses PPS (Y-code) GPS signals, operating on both the L1 and L2 frequencies. When configured with a multi-element Controlled Reception Pattern Antenna (CRPA), the AGR’s post-correlation nulling techniques allow continued satellite track in the presence of high levels of hostile jamming. This patented anti-jam concept also provides satellite beam steering, to further enhance the tracking thresholds, and to mitigate the “spurious nulls” that can degrade the performance of other nulling implementations (e.g., pre-correlation). The AGR sequentially tracks up to eight visible satellites, and provides high-quality pseudorange/delta pseudorange (PR/DPR) measurements corrected for the effects of selective availability. The Tactical Tomahawk’s navigation processor then uses the PR/DR measurements to yield a high-performance navigation solution.
Elbit Systems Introduces a New Tactical UAS: the Hermes 650 Spark
Elbit Systems has rolled out the Hermes 650 Spark, the latest addition to its Hermes family of Uncrewed Aerial Systems (UAS). Spark is designed to be the contemporary successor to the long-serving Hermes 450, aiming to modernize UAS fleets that currently consist of mixed 450/900 models or are exclusively equipped with the 450 variants.