Scott Johnson has over twenty years experience in system architecture, database design, software development with twelve years of project leadership experience and hardware configuration. His GPS and telemetry experience include the development of a GPS telemetry abstraction layer that was based on a de-commutation server that Mr. Johnson had previously developed for NASA's X-Ray telescope testing facility. The abstraction layer was necessary due to the five unique vendor supplied mobile GPS devices used by the project. The GPS receivers used GPRS (General Packet Radio Service) for hosting a port on a static IP. The various GPS data sets were normalized by the abstraction layer into a binary data record for distribution to a real-time vehicle tracking system. The tracking system transformed the latitude and longitude elements for use by a third party mapping system. Epochs from the GPS UTC clock and the server's system NTP (Network Time Protocol) derived clock were stored at millisecond resolution. Timing deltas were captured for alerting users when GPRS system latency exceeded predefined thresholds.
Mr. Johnson also developed software to test underwater digital communication methods for the US Navy using the GPS UTC clock telemetry data along with a dedicated IRIG system clock. This was to precisely time the telemetry data from an underwater acoustics sonar array that was capturing signals being generated from a separate towed array or mounted to a research submarine. The measurements required coordinated time stamping at the microsecond level.
Mr. Johnson has had teaching experience with AVL Systems, Inc., Huntsville, Alabama, and at Quality Research, Inc., Huntsville, Alabama, where he conducted technical training courses for NASA and Quality Research employees, creating lecture outlines and hands-on computer course work.
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