Digital ChoreoGraphics' Projects for
NASA and Jet Propulsion Laboratories

MSAT-X : Mobile Satellite Telecommunications Experiment

Digital ChoreoGraphics designed and developed the Modem Software and Diagnostic I/O Hardware for the MSAT-X project. The project was funded by a consortium of satellite communications organizations.

This digital telephone was designed to transmit a signal to and receive a signal from an orbiting or geo-stationary satellite. The RF technology was a four phase signal that encoded 16 symbols (QPSK). Since the signal would doppler shift as a 600 mph combat aircraft turned, or the satellite progressed through its orbit, the software had to track the center frequency of the signal and predict subsequent phase changes for the demodulation stage.

The modem consisted of five asynchonous TMS32010 Digital Signal Processors, each having its own Realtime Operating System. One processor performed modulation, and the other four DSP's formed the signal tracking and demodulation pipeline.

Digital ChoreoGraphics designed and wrote the operating systems, data acquisition sub-systems, digital filters, data encoding and decoding firmware, interprocessor communication code, self-test diagnostic firmware, and designed and built the 8086 based hardware, software, and diagnostic tools for the test fixture.

This is the technolgy that went into your personal digital cellular telephone.

3D Visualization

Digital ChoreoGraphics designed and developed a 3 Dimensional Visualization and Animation software package used to present data captured from the Goldstone Radar facility.

Digital ChoreoGraphics responded to a requirement from JPL's Deep Space Network to quickly provide an inexpensive 3D Visualization tool to be used in preliminary research for the Martian Rover Project. NASA scientists wanted to preview the Rover's route over the Martian terrain from data collected at NASA's Goldstone, CA radar facility.

The 3D Visualization software allowed the NASA scientist to reconstruct the surface of a planet (e.g. Mars or Venus) from the radar altitude data. The software also provided for animation, i.e. "fly by's" of a planet in 3D.

The 3DVIS software was also used with Venusian data to recreate Venus' surface, and to display surface information and reconstruct images of major asteroids.

Pick on the following images for full-screen displays.

LEFT The "Crater Farm" on Venus, overlaid with altitude info.
TOP A Fun Spacey Fantasy - from Tarman Designs
MID. A Vision of the Rockies from the Pacific Northwest
BOT. This image, and MID. above were created for National Geographic Society Magazine at the request of the USGS.