H2O/NaCl-Based Radio Frequency Power Load

Marshall Space Flight Center, Alabama The purpose of the invention was to increase the operational power levels of power loads as well as improve the overall reliability and safety of existing systems. Using water (H2O), table salt (NaCl) or some other form of salt, and a matching network, an RF power load can be built to absorb transmitted power levels in the 10s or 100s of kilowatts, where the water absorbs the power. The only byproduct is the barely detectable heating of the water bath.

Posted in: Briefs, Electronics & Computers, Power Management, Radio equipment, Electric power


Discovery Through Eigenbasis Modeling of Uninteresting Data

The system learns only what to ignore, reducing the possibility of missing the items of interest. NASA’s Jet Propulsion Laboratory, Pasadena, California When presented with a new data set, a common initial goal is to explore its contents in a discovery mode to find items of interest. However, each user who views the data set may have a different scientific goal in mind, and therefore a different desired prioritization of the items for examination. Further, as the users explore more of the data set, they accumulate concrete examples of what is or is not of interest. The goal of this work was to formalize this iterative approach to understanding large data sets, and instantiate it with methods capable of the necessary adaptation as the system iteratively acquires user feedback.

Posted in: Briefs, TSP, Electronics & Computers, Information Sciences, Software, Statistical analysis, Data management


Obstacle Avoidance Methods

NASA’s Jet Propulsion Laboratory, Pasadena, California Obstacle avoidance is a difficult problem due to the non-convex state constraints. Therefore, the feasible state space needs to be convexified, or split, into convex regions at which point the search for an optimal solution among those convex regions is done. Methods for obstacle avoidance include two mixed integer linear programming (MILP) methods (obstacle related method and path-related method) and a state-constraint convexification method.

Posted in: Briefs, TSP, Electronics & Computers, Information Sciences, Software, Computer software and hardware, Collision avoidance systems


Bar Code Scanner to Supplement Property Inventory Process

There is no longer a need for any paper check-off sheets. Goddard Space Flight Center, Greenbelt, Maryland Within NASA Goddard, property inventories outside of the formal inventories had no automated method to perform quick checks of equipment location, especially during periods leading up to a formal inventory. One method that existed simply involved printing out an end-user’s equipment in a hard-copy form, and having each employee search for and annotate the results on the hard copy. These hard copies would then have to be returned to the property custodian. Information on the new whereabouts of equipment may or may not have been updated. This approach also relied on an honor system and the work styles of different individuals. Sometimes, multiple reminders needed to be sent to some employees to complete their inventory. In other cases, inventory was made more difficult because of the location of the equipment. A lot of property consists of test equipment in a lab environment. In this case, equipment is sometimes hard to access or grouped with numerous other pieces. These cases make it difficult to read off barcode numbers.

Posted in: Briefs, TSP, Electronics & Computers, Software, Data management, Logistics


Semantic Language and Tools for Reporting Human Factors Incidents

Lyndon B. Johnson Space Center, Houston, Texas This human factors incident reporting tool for authoring and using human factors incident data combines semantic Web technologies with automated assistive technologies to aid users in finding relationships among incidents. The semantic indexing provided by the use of incident reporting language permits more sophisticated search of archives. During Phase I of this project, a semantic language for incident reporting in XML was defined, and a technology approach was designed for authoring and using incident reports represented in this language. In Phase II, this software was implemented and its effectiveness evaluated for the space human factors community at JSC.

Posted in: Briefs, TSP, Electronics & Computers, Software, Computer software and hardware, Human factors


Control Software for Integrated CW Radar Module

This software controls the behavior of a miniaturized microwave radar module. It controls the hardware, digitizes raw samples from the analog output of the module, and applies DSP (digital signal processing) algorithms to the data stream to reduce the bandwidth and data rate. It also implements an automatic calibration algorithm to adjust the I/Q (in-phase and quadrature) values in the cancellation path to remove a large unchanging signal. The software implements a variety of commands to control the behavior of the system, and provides for synchronization of multiple modules. It encodes the digital data in a format suitable for serial ports.

Posted in: Briefs, TSP, Electronics & Computers, Information Sciences, Software, Computer software and hardware, Radar


Furuno Radar/SureTrak Interface Software

Goddard Space Flight Center, Greenbelt, Maryland The Wallops Flight Facility Launch Range has a need to interface data from ship surveillance Furuno radar to an existing surveillance display system (SureTrak). SureTrak is a multi-sensor waterway and air surveillance system. The display of Furuno radar data by the SureTrak system will be used for risk analysis purposes prior to rocket launches. The capability did not exist within the SureTrak system to ingest data from the Furuno radar. This software application was developed to provide the needed data interface capability within the SureTrak system. In addition to providing a data interface to SureTrak, the software application will also provide a data interface to another software application that performs probability of impact calculations on the ships reported by the Furuno radar.

Posted in: Briefs, TSP, Electronics & Computers, Software, Computer software and hardware, Radar


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