Range/Range Rate Subsystem (RRS) for Completely Integrated Reference Instrumentation System (CIRIS)

摘要

An equipment procurement comprising a Range/Range Subsystem (RRS) for the Completely Integrated Reference Instrumentation System (CIRIS) is described in detail in a final technical report. An RRS composed of an airborne interrogator and four ground-based transponders is designed, fabricated, factory acceptance-tested, and delivered to the Air Force. With the interrogator operating under the control of the CIRIS airborne computer, and with ground transponders set up for operation at known (surveyed) locations, the RRS measures slant ranges from 200 feet to 200 miles with instrumental accuracies to within 3 feet rms, and measures range rates varying from -5000 to +5000 fps with instrumental accuracies to within 0.03 fps rms under range acceleration conditions from -1000 to +1000 fps squared. The CIRIS computer employs the RRS data to optimally update an inertial measurement unit, providing an accurate, real-time aircraft position, velocity and attitude reference system for aircraft flight test programs. Predesign analyses of subsystem requirements are discussed, delivered equipment units are pictured and described, and details of the computer/interrogator interface are presented. New circuit developments include a microstripline preamplifier, fully limiting receiver and 7.5W power amplifier, all operating at 1.6 GHz. A transponder verification problem is identified and its solution is provided. The report concludes that the RRS units will reliably meet all specified performance criteria. (Author)