Welcome to GB7ESC – Exploring the Frontiers of Amateur Radio Networking and Satellite Communications

Step into the dynamic world of packet radio, where traditional RF meets modern networking. GB7ESC serves as a hub for digital experimentation, connecting operators through the robust flexibility of BPQ32. Whether you’re configuring AXUDP links, exploring HF packet communication, or simply curious about how nodes speak to one another across bands and borders, there’s something here for you.

Beyond the atmosphere, our interest expands to amateur radio satellites—tiny beacons of opportunity circling the globe. From decoding telemetry to exchanging messages via orbiting digipeaters, satellite operations bring a new dimension to amateur radio. If you’re fascinated by low-earth-orbit comms, Doppler tracking, or integrating satellite gateways into BPQ systems, you’ll find insights and projects that spark ideas.

At GB7ESC, we believe in practical experimentation, reliable performance, and building systems that last. Have a look around, see what’s brewing, and maybe even get inspired to launch something of your own.

Amateur Radio Satellites – Expanding Horizons Beyond Earth

Amateur radio satellites, often referred to as OSCARs (Orbiting Satellites Carrying Amateur Radio), enable licensed operators to communicate across vast distances using low-power equipment. These satellites operate in various modes—FM, SSB, CW, and digital packet—and typically orbit in Low Earth Orbit (LEO), offering brief but frequent communication windows.

Key highlights:

• Popular satellites include AO-91, SO-50, RS-44, and CAS-4B, each supporting different modes and bands.
• Operating modes range from FM crossband repeaters to linear transponders and digipeaters for packet radio.
• Tracking and scheduling are essential, with tools like SatPC32, Gpredict, and AMSAT’s online resources helping operators plan passes.
• Doppler shift compensation is crucial, especially on UHF, to maintain clear communication during satellite movement.
• Telemetry and experimentation: Many satellites transmit telemetry data, allowing operators to contribute to scientific and technical research.