John R. Samson

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— 123 With the ever-increasing demand for higher bandwidth and processing capacity of today's space exploration, space science, and defense missions, the ability to efficiently apply commercial-off-the-shelf (COTS) processors for on-board computing is now a critical need. In response to this need, NASA's New Millennium Program office has commissioned the(More)
This paper describes the successful development and demonstration of a Laser Fault Injection (LFI) technique to inject soft, i.e., transient, faults into VLSI circuits in a precisely-controlled, non-destructive, non-intrusive manner for the purpose of validating fault tolerant design and performance. The technique described in this paper not only enables(More)
This paper focuses the attention on the problem of Radio Frequency Interference (RFI) mitigation in the framework of GNSS. The paper concentrates on interference mitigation algorithms to be applied within the digital part of a GNSS receiver. The first part of the paper focuses on the mitigation of RFI based on Wavelets. The theoretical fundamentals of the(More)
—The Space Technology 8 (ST8) mission is the latest in NASA's New Millenium Program technology demonstration missions. ST8 includes a spacecraft bus built by industry, flying four new technology payloads in low-Earth orbit. This paper will describe each payload, along with a brief description of the mission and spacecraft. The payloads include a miniature(More)
Space exploration, science, and defense missions are requiring ever-increasing bandwidth and processing capacity to the extent that the ability to apply high performance COTS processors for onboard computing in space is becoming a critical need. NASA NMP ST8's Dependable Multiprocessor (DM) is an experimental system embodying an architecture and a(More)
1 The Dependable Multiprocessor project was formerly known as the Environmentally Adaptive Fault Tolerant Computer project. With the ever-increasing demand for higher bandwidth and processing capacity of today's space exploration, space science, and defense missions, the ability to efficiently apply commercial-off-the-shelf (COTS) processors for on-board(More)
The expanding application of computing systems and the continuing advances in semiconductor technology are forcing the on-chip inclusion of design for dependability features (concurrent fault tolerance). These features detect, log and provide recovery from errors induced by faults concurrently with the operation of the system. A very difficult task is the(More)