Steve Parkes

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This article reviews the technique of verbal protocol analysis and gives a profile of its use within software engineering research over the last two decades. An overview is given of the procedures used in verbal protocol analysis, and commonly-found difficulties in the application of the technique by researchers are described. The article reports on(More)
Spacecraft exploration of asteroids presents autonomous-navigation challenges that can be aided by virtual models to test and develop guidance and hazard-avoidance systems. Researchers have extended and applied graphics techniques to create high-resolution asteroid models to simulate cameras and other spacecraft sensors approaching and descending toward(More)
(2) Austrian Aerospace Complete mailing address (including country) Email: (2) EADS Astrium GmbH Complete mailing address (including country) Email: ABSTRACT A SpaceWire network comprises SpaceWire links, nodes and routers. The nodes are the functional units that wish to use the onboard communication services of the SpaceWire network and are fitted with one(More)
SpaceWire time-codes provide a means of distributing time information across a SpaceWire system [1][2]. Time can be distributed across a large network with relatively low jitter. This time information can be provided as ticks or as an incrementing value which may be synchronized to spacecraft time. Time-codes provide a mechanism for supporting distributed(More)
In mainstream software development there can often be a gap which exists between the stages of performing the architectural design of a software system and implementing the detailed algorithms and processes required in the program code. Code Rocket is a code visualization and documentation system which has been developed to fill this gap. Code Rocket(More)