Mars Exploration Rover: mission system critical design review
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MER Mars Exploration Rover critical design review ↗
Engineering topics
Erickson, J.
Publications and source records attributed to Erickson, J..
Issues for Radiation Assurance Validation at Jupiter's Moon, Europa
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Radiation Jupiter Europa Dose Spacecraft Anomalies↗
Issues for Radiation Assurance Validation at Jupiter's Moon, Europa
Missions to Europa and other moons of Jupiter will experience the most severe radiation environment in the Solar System outside the Sun.
Radiation Mission Assurance Dose Failure Electroni↗
Project Galileo Completing Europa, Preparing for Io
Galileo has completed the Europa leg of the Galileo Europa Mission, and is now pumping down the apojove in each succeeding orbit in preparation for the Io phase.
Galileo↗
Galileo Post-GEM Option
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Galileo Post-GEM↗
Galileo Orbitor Telemetry Measurements and Data Formats, Level 3/Galileo Orbitor Flight Equipment Plasma Wave Subsystem
This document establishes the functional requirements of the Galileo Orbitor plasma wave subsystem (PWS) which is used to investigate electric and magnetic waves in space plasmas.
Galileo OTM PWS↗
Galileo Software Interface Specification -- Spacecraft Event File (SEF) Phase 2
This Software Interface Specification (SIS) describes the form and syntax of each S/C Event File (SEF) which is a product of the Mission Sequence System (MSS).
S/W SIS SEF Phase 2↗
Technology test results from an intelligent, free-flying robot for crew and equipment retrieval in space
The ground-based demonstrations of Extra Vehicular Activity (EVA) Retriever, a voice-supervised, intelligent, free-flying robot, are designed to evaluate the capability to retrieve objects (astronauts, equipment, and tools) which have accidentally separated from the Space Station. The EVA Retriever software is required to autonomously plan and execute a target rendezvous, grapple, and return to base while avoiding stationary and moving obstacles with subsequent object handover. The software architecture incorporates a heirarchical decomposition of the control system that is horizontally partitioned into five major functional subsystems: sensing, perception, world model, reasoning, and acting. The design provides for supervised autonomy as the primary mode of operation. It is intended to be an evolutionary system improving in capability over time and as it earns crew trust through reliable and safe operation. This paper gives an overview of the hardware, a focus on software, and a summary of results achieved recently from both computer simulations and air bearing floor demonstrations. Limitations of the technology used are evaluated. Plans for the next phase, during which moving targets and obstacles drive realtime behavior requirements, are discussed.
Erickson, J.↗
Optical Testing of Integrated Circuits
Optical spot-raster scanner produces weighted photoresponse image (PI) of operating CMOS IC. Digital analysis of PI's, which correlates differences in PI's with electrical behavior of IC, shows promise both as 100-percent screening method for use in IC manufacture and as diagnostic tool in IC development.
Erickson, J.↗
Research advances in satellite-aided crop forecasting
The underlying concept of the technology is to estimate crop area and yield for specified regions and to multiply the two to obtain production at the regional level. The treatment here is mainly of area estimation. The approach to non-U.S. crop forecasting does not require ground observations. Among the problems hampering development are the need to estimate crop areas much earlier in the season and the need for information extraction methods that reduce the quantity and quality of the data required.
Erickson, J.↗
Supporting Research and Technology (SRT) session: Supporting research, a focused approach to research development
There are no author-identified significant results in this report.
Erickson, J.↗
Multispectral scanner data processing algorithm documentation
The algorithms employed in the current ERIM data processing scheme are described. Methods for suitable visual display of the results of this processing are discussed.
Gordon, M.↗