Magazine

The Automated SAR Image Processor (ASIP) computer program increases the efficiency of production of scientifically useful imagery from raw synthetic-aperture-radar (SAR) image data. In the absence of ASIP, the processing of SAR data is a labor-intensive task, often involving supporting personnel, that...

A software system designed to provide a purely signal-based diagnosis of virtually any time-varying system has been developed. This software is part of an overall concept called “Beacon-based Exception Analysis for Multimissions,” or BEAM. This concept provides for real-time...

The EMNet computer program has been developed to overcome the difficulties and reduce the errors that, heretofore, have been encountered in transferring data from computer-aided design (CAD) systems to computer numerically controlled (CNC) machines. EMNet could improve operations in almost...

A computer program implements several aspects of the International Temperature Scale of 1990 (ITS90).

The 1999 version of the NASA/Marshall Space Flight Center Global Reference Atmospheric Model (GRAM-99) and version 3.8 of the Mars Global Reference Atmospheric Model (Mars- GRAM) are the latest in two series of computer programs for calculating selected physical properties of the...

The Gyroscope Automated Testbed (GAT) is a fully automated inertial device characterization testbed. Rotational response parameterization and shortterm noise stability analysis are the fundamental principles behind the system. Complete response characterization, bias stability, sensitivity, and range are supported along...

A computer program offers enhanced capabilities for calculating two-dimensional (2D) patterns needed to construct specified three-dimensional (3D) surfaces to within acceptably close approximations, with minimal waste of sheet material. Examples of complexly shaped sheet-material items that could be...

Electron-beam welding at high temperatures has been found to be a suitable process for joining structural components made by casting certain superalloys. This process can be used in the fabrication of superalloy parts that must withstand high operating temperatures. Examples of such parts...

A method of relatively easily, rapidly, and inexpensively quantifying the structural diversity of a multiple-species community of micro-organisms is based on the rate of extinction of phenotypic traits across a dilution gradient of a sample of the community. In this context, the concept of...

A special-purpose solar simulator includes (1) a tungsten lamp that serves as a gray-body radiator with a temperature of 3,200 K and (2) a mosaic of filters such that the filtered lamp output has the same normalized spectral irradiance as that of sunlight outside the atmosphere of the...

The IEEE 1394 and I2C Mixed-Signal Driver is one of two application-specific integrated circuits (ASICs) designed to function together as an interface among the following three digital-signal buses: A peripheral component interface (PCI) bus; A high-speed serial data bus that conforms to...

JIFI (Jet Propulsion Laboratory's Implementation of a Fault Injector) is a computer program for studying the ability of a computer to tolerate, detect, and/or recover from faults (that is, bit errors). JIFI affords the capability to inject faults into user-specified central- processing-unit (CPU)...