Capabilities Expansion (LoRa, Auto-NOAA & Listening Post 2.0

[pantojinho]

Hi! I have been exploring the potential of intercept and I see great opportunities to expand its SIGINT capabilities. Based on the current architecture, I have outlined a roadmap for three major feature requests.

I would love to discuss the feasibility of these ideas:

1. Satellite & LoRa Telemetry (TinyGS Style)

I want to implement a section dedicated to receiving LoRa satellite telemetry (similar to [TinyGS](https://github.com/G4lile0/tinyGS/wiki)) and sniffing LoRa Mesh networks (like Meshtastic).

• Plan A (SDR - Software Approach):
  My primary goal is to use the existing SDR dongle to decode LoRa packets directly without extra hardware. This would involve integrating a demodulator capable of handling LoRa chirps (potentially wrapping gr-lora or experimental rtl_433 LoRa protocols) to parse telemetry and display it on the dashboard.
• Plan B (Hardware Fallback):
  If direct SDR decoding proves too CPU-intensive, the fallback would be to support an external LoRa module (ESP32 + SX127x/SX126x) connected via USB/Serial, where intercept simply reads and visualizes the incoming serial JSON stream.

2. Automated Satellite Imagery (NOAA/Meteor)

Leveraging the existing skyfield dependency, I propose adding an automated image decoder pipeline:

• Workflow:

1. Schedule: Predict passes for NOAA 15, 18, and 19.
2. Capture: Trigger rtl_fm to record baseband/audio during the pass.
3. Decode: Pipe the recording into an image decoder (like noaa-apt or satdump CLI).
4. Display: Save the resulting images to the static folder and display them in a gallery view within the web interface.

3. Listening Post 2.0 (Waterfall & Advanced DSP)

The current Listening Post module is great for scanning, but I propose upgrading it into a full-featured WebSDR interface to allow precise signal hunting.

• Visual Spectrum (Waterfall):
  Implement a classic FFT Waterfall/Spectrum display. This is crucial for visualizing signal activity in real-time, allowing users to "see" the signals before tuning into them, rather than just scanning blindly.

• Band Filters & DSP:
  Add adjustable bandwidth filters to isolate signals from noise.

• Variable Bandwidth: Allow narrowing the passband (e.g., 2.7kHz for SSB, 6kHz for AM, 12kHz for NFM).

• Demodulation Modes: Expand support for LSB/USB (Single Sideband) and CW to properly monitor amateur radio communications.

• HF/Direct Sampling Support:
  Add a toggle for Direct Sampling (Q-Branch) mode. This enables RTL-SDR v3/v4 dongles to tune below 24MHz, opening up the "Listening Post" to:

• HF Bands: 80m, 40m, 20m (Amateur Radio).

• CB Radio: 11m band.

• Shortwave Utility: Global communications.