Release Notes for Version 1.8.1

Version 1.8.1 includes an important bug fix for Apogee Lockout +operation in all flight computers. Anyone using this option +must update firmware.

This release also contains a change in how flight computers +with accelerometers deal with speeds around and above Mach +1. In previous versions, the flight computer would completely +disregard the barometric sensor above 330m/s (around Mach +1). Now, the data from the barometric sensor is reduced in +effect without ever going away entirely. This prevents early +drogue deployment for flights which spend considerable time +above Mach 1.

1.8.1 also contains a couple of minor fixes for AltosUI when +analyzing saved data files.

1. AltOS

AltOS Bug Fixes

+Handle time value wrapping in Apogee Lockout +correctly. Without this, apogee lockout would sometimes +prevent any drogue charge from firing. +
+Change Kalman filter on flight computers with accelerometer +to continue using the barometric sensor even at high speeds +to avoid unintentional drogue deployment during +deceleration. +

2. AltosUI and TeleGPS Applications

AltosUI New Features

+Add new Huge font size to make text even bigger on high +resolution monitors. +

AltosUI Bug Fixes

+Prevent some crashes when reading older saved flight data +for graphing or KML export. +
+Load frequency preference at startup. The loading code was +broken, so you’d see only the default frequencies. +