<div align="left" style="font-family: Arial, Helvetica, sans-serif; font-size: 12px">Space Instrumentation Lab</div>

COUPLING OF DYNAMICS AND AURORA (CODA)

CODA's two specific scientific goals were to measure the magnitude and distribution of turbulent diffusion in the lower E-region of the atmosphere (a result of auroral forcing) and to measure the meso-scale (10-100 km) horizontal variations in the vertical velocities of this turbulence.

The system was launched successfully 21 February 2002 into a decaying aurora, following a moderate to strong auroral substorm. The CODA payload, consisting of six sensor systems, followed the launch of three chemical-release rockets as closely as possible. Instruments aboard CODA measured the dispersion of chemical plumes from those rockets to provide estimates of turbulent diffusion in the lower E-region.

SDL designed and built or reconditioned two of the six sensor systems on board: a Plasma Frequency/DC Probe (PFP) combination to measure electron density, which was entirely SDL technology, and an Atomic Oxygen Experiment (ATOX) to measure atomic oxygen content.