Custom GNSS Receiver for Drones

I'm seeking an experienced hardware developer to build a custom 4-channel GNSS receiver specifically designed for high-precision drone navigation.

Key Requirements:
- 4-channel GNSS capability
- High precision positioning
- Custom hardware

Ideal Skills and Experience:
- Expertise in GNSS technology
- Experience with navigation systems
- Proficient in hardware development and integration

Please provide examples of relevant work and a detailed approach to meet these requirements.