A PPK RE-entry Telemetry System

Abstract

This article introduces a new re-entry telemetry system. It is based on the theory of PCM/PPK and applies wait and receive mode of pulse modulation system. It has the capabilities of telemetering slow changing, fast changing, super fast changing and height parameters. With the memory and replay technique, the system can telemeter full range characteristic data and data in black area. Microcomputers are used in both airborne equipment and ground equipment of the system. It features digitalized interface, high precision, simple hardware and high reliabilty.