NOAA Satellites

Receiving weather images directly from space using simple equipment.

Active Satellites

- NOAA 15 - 137.6200 MHz - NOAA 18 - 137.9125 MHz - NOAA 19 - 137.1000 MHz

Transmitting APT (Automatic Picture Transmission) as they pass overhead.

Reception Basics

Minimal Setup

- RTL-SDR dongle ($30) - V-dipole or QFH antenna - Computer running SDR# - WXtoImg or noaa-apt for decoding

Better Setup

- LNA (low noise amplifier) - QFH or turnstile antenna - Raspberry Pi for automated captures

The Magic

These satellites broadcast continuously. When one passes overhead (4-6 good passes daily), you can receive live weather imagery showing hundreds of miles of Earth. No license needed. No subscription. Just you and a satellite.

Signal Characteristics

- FM modulated - 2400 Hz subcarrier - Transmits during entire pass - Strongest when directly overhead - 10-15 minute passes

Forestpunk Applications

- Monitor weather systems approaching your area - Track forest fire smoke plumes - Observe seasonal changes from space - Complete off-grid weather intelligence

Current Projects

- Building weatherproof permanent station - Automated capture and processing pipeline - Integration with local mesh network - Correlating images with ground observations

Next Steps

- METEOR M2 reception (digital, higher resolution) - GOES geostationary reception (requires dish) - ISS SSTV events