CONTRAST: Low Rate (LRT - 1 sps) Navigation, State Parameter, and Microphysics Flight-Level Data

Updated UHSAS corrects underestimated ambient concentrations.

This update contains corrected 2DC data (variable names ending in _LWOO). No other data has been changed. It was discovered that all particles in a single buffer got time-stamped with the data-system time tag of the end off the buffer. For concentrations above 5-10/L, or when in heavy cloud, the system writes multiple buffers per second so the time-stamp will be very close to accurate. However when a buffer spans multiple seconds, all particles were being binned to the second of the end time-stamp for the buffer. This has now been corrected so data is spread across the time-period of the buffer correctly. This version also uses exact circle fitting for measuring particle size and limits accepted particles to center-in images. Finally, the variable A1DC, which was accidentally left in the last version, has been removed.

Some processing algorithms have changed since the last release. This version contains:

• recovery factor study modifications for temperature (elements 1 & 2 get a separate recovery factor now)
• humidity / MACH / TAS algorithm updates
• modifications to the wind uncertainty algorithm
• and for 2d processing, the processing didn't change, but extract2d got a new algorithm for determining which records should be rejected and not transferred into the 2d file.