doc: Update for 1.8.1

[fw/altos] / doc / release-notes-1.8.1.inc

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+= Release Notes for Version 1.8.1
+:toc!:
+:doctype: article
+
+       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.
+
+       == 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.
+
+       == 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.