Sensors/Data Acquisition

Hyperlinked Overview of Piloted Evaluations (HOPE) Web- Based Data Archive

Langley Research Center, Hampton, Virginia The Hyperlinked Overview of Piloted Evaluations (HOPE) application provides an interface for users to enter data on pilots, metrics, configurations, tasks, and data collection sessions, as well as descriptive information for each item and the experiment as a whole. As this information is collected, hyperlinks allow other users (possibly without editing privilege) to peruse the database and see all runs for a given task or configuration, background information on evaluation subjects, simulation configuration, and summaries of various metrics.

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GRAVITE Database

Goddard Space Flight Center, Greenbelt, Maryland Government Resource for Algorithm Verification, Independent Test, and Evaluation (GRAVITE) system is a National Oceanic and Atmospheric Administration (NOAA) system, developed and deployed by Joint Polar Satellite System (JPSS) Ground Project to support Calibration and Validation (Cal/Val), Data Quality Monitoring, and Algorithm Investigation, Tuning and Integration. GRAVITE enables novice and expert users to discover and obtain data easily by using standard protocols. The Database is a component of the GRAVITE version 3.0 (GV3.0) system. It stores necessary information about archived files and corresponding metadata in a maintainable PostgreSQL database, and provides easy access to all GV3.0 components.

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GRAVITE Monitor

Goddard Space Flight Center, Greenbelt, Maryland Government Resource for Algorithm Verification, Independent Test, and Evaluation (GRAVITE) system is a National Oceanic and Atmospheric Ad - ministration (NOAA) system, developed and deployed by Joint Polar Satellite System (JPSS) Ground Project to support Calibration and Validation (Cal/Val), Data Quality Monitoring, and Algorithm Investigation, Tuning and Integration. GRAVITE enables novice and expert users to discover and obtain data easily by using standard protocols. The Monitor is a component of the GRAVITE version 3.0 (GV3.0) system. It monitors the status of the various components including those used from Apache OODT (Object Oriented Data Technology) and provides certain statistics. GV3.0 system has very large volumes of data arriving from multiple sources, and requires many PGEs (Product Generation Executable) to be run against the data. Operators must be able to analyze the incoming data without needing to examine every file individually. The general problem of monitoring a complex software environment via status and statistics is common and well documented.

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Signal Processing for High-Temperature Health Monitoring of Condensed Water Height in Steam Pipes

An algorithm has been developed for monitoring the health of steam pipes to determine the height of condensed water through the wall in real time. NASA’s Jet Propulsion Laboratory, Pasadena, California An algorithm for analyzing wave reflections and time-of-flight ultrasonic pulse-echo data has been developed for monitoring the health of steam pipes to determine the height of condensed water through the wall in real time, at temperatures up to 250 °C.

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Satellite Situation Update

Goddard Space Flight Center, Greenbelt, Maryland Satellite Situation Update (SSUP) software shows the current locations of a selected set of orbiting spacecraft, along with each satellite’s ground track and/or orbit shape. SSUP is intended as a real-time display, showing multiple spacecraft, that is suitable for a large wall monitor meant to be in public spaces for the appreciation of a wider audience. Satellite positions are constantly updated to stay current, based on either publicly available information (e.g. Celestrak) or other sources [by arrangement with Flight Dynamics Facility (FDF)]. The user chooses the spacecraft to be monitored, as well as other configuration parameters. SSUP is intended for education and outreach purposes; it is a way for an organization to, for example, take pride in the spacecraft they had a role in building or operating. SSUP also is an attractive way to stimulate interest in Earth-Sun-Moon relationships and basic orbital geometries.

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Non-Intrusive, On-Line, Simultaneous Multi-Species Impurity Monitor for Hydrogen Gas

A sensor based on this technique could be used to monitor gas composition for multiple industries. Stennis Space Center, Mississippi In testing hydrogen-fueled engines, the purity of the hydrogen fuel is important. Hydrogen may become contaminated with nitrogen (N2), argon (Ar), or oxygen (O2), thereby making the hydrogen unusable for engine testing at Stennis Space Center (SSC). Therefore, for rocket engine testing, the quality of hydrogen from the fuel tank or feed line is tested before use. If there are contaminants found within the hydrogen, it is mandatory for the tank to be emptied; this results in testing delay. Therefore, NASA has specific interest in measuring concentrations of N2, Ar, and O2 in hydrogen gas. The approach currently used for testing the purity of hydrogen is conducted by collecting a gas sample from the hydrogen supply line or storage tank and then sending it to an analytical laboratory for evaluation. This procedure is time consuming and can, if the sampling is not carefully conducted, inadvertently introduce contamination, which would provide a misguided reading for the entire tank. Therefore, establishing a non-intrusive, on-line, near-real-time monitor that has a simultaneous multi-species impurity detection capability for hydrogen would eliminate these issues.

Posted in: Briefs, Sensors

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X1 Human Interface Detection System (HIDS)

This sensor technology can detect pressures, such as ground force reactions, down to 30 g in weight. Lyndon B. Johnson Space Center, Houston, Texas This innovation is a sensor technology that can detect pressures, such as ground force reactions, down to 30 g in weight with a minimum resolution of 5 × 5 mm (resolution dictated by the limitations of the resistor grid array). This device uses a commercially available resistor grid array and custom sensing hardware and software. The sensor hardware encompasses an area no greater than 2-3/8 × 2-3/8 in. (≈6 × 6 cm) and, combined with the software, can process more than 900 pressure points at a minimum rate of 72 scans/second (each scan = 900 sensors). The custom hardware and software is, by design, adaptable to all operating systems, as well as custom data protocols and data transfers. In addition to determining relative pressures and center of pressure measurements, the device also uses a sensing system to detect weight (force) within 2% accuracy using a strategic load cell topology. This pressure system, in combination with a force detection system, is called X1 HIDS.

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