The following high-level ARAIM Evolution has been proposed to cover applications within the UAV User Sector for the long term:
- Multi-frequency, multi-constellation GNSS measurements.
- Use of precise point positioning (PPP) in combination with ARAIM using Galileo HAS.
- Hybridization with IMU.
- The use of ISM.
The incorporation of Precise Point Positioning (PPP) by means of the HAS, provides benefits in the form of:
- Higher accuracy achieved through the use of a PPP algorithm and corrections.
- Free of charge PPP corrections with Galileo HAS, covering both Galileo and GPS.
- Possibility to expand to other constellations through IGS products.
Benefits of hybridization with an IMU are:
- Higher frequency PNT output which will result in higher continuity and availability.
- Higher accuracy and tighter Protection Limits.
- Robustness to variations in GNSS signal quality, high user dynamics and to an extent to user environment such as multipath.
- Satellite (re)acquisition time can be reduced by implementing IMU measurements in the processing loop.
The use of more than two satellite constellations provides the following benefits:
- More usable satellites in view, which is especially important in urban areas, will result in tighter integrity bounds and higher availability and continuity.
