Syntonics’ Staring Projectile Detection Radar (SPiDR) uses stealthy ultra wideband “noise” radar to detect incoming and near-miss projectiles ranging from slow RPGs to fast rifle bullets. Staring ultra wideband (UWB) noise radar are lightweight, elegantly simple, intrinsically low cost/low power devices that use low probability-of-detection (LPD) spread-spectrum radio frequency signals to detect and range on objects. Using LPD signals at power levels comparable to the environmental RF noise floor means the radar can operate without a detectable electronic signature.
Within approximately 20 milliseconds of hostile fire, SPiDR annunciates the relative bearing to the firing point(s) and provide continuous relative bearings to the incoming projectile(s) using a combination of audio and video displays. SPiDR can:
SPiDR’s detection and ranging technique is intrinsically immune to platform vibration and maneuvering. Its radar modules are small and can be mechanically integrated in a variety of ways including as conformal patches on the platform alongside existing threat sensors, or as a single multi-sided squat pyramid. SPiDR’s user interface can be integrated with the AN/AVR-2B Laser Warning System or Advanced Aircraft Survivability Equipment (AASE).
- Detect incoming projectiles with velocities ranging from ~350 fps (an RPG), up to ~4400 fps (the fastest rifle bullet). This velocity range is adjustable in software.
- Electronically trigger countermeasures and/or alarms after a hostile projectile moves only 20 feet towards a SPiDR unit.
- Ignore outgoing projectiles (i.e., return fire), noise, sunshine, bright lights, all sonic effects, and airborne objects such as other aircraft, rocks and dust.
- Operate stealthily due to the use of spread spectrum technology.
» FSS Antenna System
The Army is using "RF-over-fiber” technology with both heritage and new radios to implement an aerial layer of aerostat-based communications in Afghanistan. Other applications of the same technology can decrease the risk of electronic detection of command posts (CP); reduce the threat to communication personnel and costly radio/crypto equipment; decrease CP set-up time; enable radio-antenna configurations that are otherwise impossible; and lower maintenance response times. The physics of relevant electro-optic components are introduced. System building blocks are introduced (e.g., lasers; detectors; optical fibers, connectors, circulators, splitters, amplifiers). System design examples are presented for specific tactical radios. The tutorial concludes with a discussion of system design issues for an aerial layer of communications relays.