
1 INTRODUCTION
1 Introduction
Vega is a precision air data sensor and audio processing system designed for use in gliders as an
integrated soaring instrument and aid to situational awareness. Vega is small, easy to use, with a
simple user interface and can be built into small instrument panels.
The air data sensor features a high fidelity total energy variometer, airspeed indicator, altimeter,
stall monitor and meteorological sensors.
The audio processing system generates audio variometer tones and speech messages over a
loudspeaker or headset. These messages provide notification of nearby aircraft determined by the
FLARM collision awareness system, as well as many other alerts and warnings.
Vega integrates with FLARM to receive GPS data and aircraft obstruction data. The object data
announced by FLARM are converted to acoustic caution or warning messages. These messages
contain data pertaining to the threat level, direction, height, type of aircraft and distance to the
object. For obstructions, the messages contain the type of threat and distance.
Multiple objects with different hazard potentials are announced. FLARM announces a maximum of
fifteen objects in the current version of the FLARM firmware (3.00). The speech system announces
the most important four objects (user-configurable).
The instrument can interface to an external glide computer such as a Portable Digital Assistant
(PDA) or panel-mounted Electronic Flight Instrumentation System (EFIS). The term EFIS will be
used in this document to refer to both EFIS systems and PDAs.
The FLARM device and EFIS are not included with the base Vega retail package and must be
purchased separately. However, the instrument will operate without these systems, albeit with
reduced functionality.
A detailed description of the features can be found in Appendix A. Technical specifications are
listed in Appendix B.
1.1 Design philosophy
Vega is intended to assist the pilot fly the glider efficiently and safely. The design employs state of
the art technology, with an interface that is simple to use. The on-board audio processing system
generates high quality sound with mixing and priority based muting in order to improve clarity.
Emphasis has been placed on sound and speech cues in order to discourage pilots from staring
into the cockpit, which is well known to be dangerous. Options are available for connecting Vega
to external vario displays.
The air data sensor can interact with an external EFIS glide computer. The open source software
XCSoar has been adapted by the developers to fully integrate with Vega. XCSoar follows a design
philosophy to reduce cockpit workload and minimise the need for pilot interaction. Since its data
format is documented and available to the public, other glide computer software may be adapted
to use Vega.
In many gliding accidents, pilot overload is known to be a contributing factor. Cross-country flying,
competitions, busy airspace and flying in unfamiliar terrain can all cause a high pilot workload for
long durations. A design goal of Vega is to help relieve this situation by giving advisory messages
and alarms when the aircraft is not being flown safely or efficiently.
The instrument comprises digital solid-state sensors and uses high speed digital microcontrollers
for all processing, delivering excellent fidelity, long-term stability, increased resistance to interfer-
1 Vega Pilot’s Manual •VEGA-P-EN