BEYOND-LINE-OF-SIGHT SDR • PLANETARY PLASMA REFLECTION MESH

Atmospheric Broadcast OS

A software-defined radio operating system written in pure Rust that turns the Earth's ionosphere into a planetary-scale communications reflector. Enables covert, long-range beyond-line-of-sight data delivery without IP addresses, routing tables, satellites, or central internet infrastructure.

RUN ATMO-OS SDR TEST SUITE POWERSHELL / BASH

git clone https://github.com/KELLERBABG/AtmoOS.git && cd AtmoOS && cargo test --workspace

PROPAGATION PARAMETERS • COGNITIVE HF SPECTRUM 13 MODULAR CRATES • 43/43 AUTOMATED TESTS PASSING

NVIS ELEVATION ANGLE

70°–90°

NEAR-VERTICAL REFLECTION GEOMETRY

OPERATING SPECTRUM

2–10 MHz

BELOW CRITICAL FREQUENCY (foF2)

PROPAGATION RADIUS

0–500 KM

ZERO SKIP ZONE IN TERRAIN & VALLEYS

STEALTH SNR THRESHOLD

< -12 dB

DECODED BENEATH THERMAL NOISE FLOOR

Ionospheric Physics & System Architecture

Conventional communications collapse when towers or fiber lines are disrupted. AtmoOS exploits plasma physics: ionizing solar radiation creates a conductive plasma ceiling at 60–1000 km altitude that physically bounces radio waves back over mountain ranges and borders.

Near-Vertical Incidence Skywave (NVIS)

Standard high-frequency radio shoots waves at shallow angles, creating a massive blind spot ("skip zone") between 50 and 500 km. NVIS radiates RF energy almost straight up into the ionospheric F2 layer. The wave refracts and rains down uniformly like a broadcast umbrella, bathing mountainous terrain in radio coverage without relays.

// Ionospheric critical frequency tracking let foF2 = iono_model.estimate_critical_frequency(latitude, solar_flux); let f_tx = foF2 * 0.85; // 85% optimal working frequency

Below-Noise DSSS Stealth Modulation

Every packet is Direct-Sequence Spread Spectrum (DSSS) encoded with orthogonal pseudorandom noise codes. The transmission power spectral density drops below the cosmic background noise floor. Adversarial spectrum analyzers register only ambient thermal static, ensuring Low Probability of Detection (LPD) and Low Probability of Intercept (LPI).

// Spread signal across wideband noise floor let spread_chips = dsss::modulate(&payload, &prn_code); let stealth_frame = stealth::apply_whitening(spread_chips);

Delay-Tolerant Networking & Meteor Scatter

When solar flares or night-time recombination close normal ionospheric reflection paths, AtmoOS switches to Delay-Tolerant Networking (DTN). Packets are queued in persistent storage until an opportunistic "Phoenix Window" opens—such as ionized trail reflections from incoming meteors burning up in the mesosphere.

// Opportunistic burst scheduler if let Some(burst) = meteor_detector.poll_ionized_trail() { dtn_queue.flush_high_priority_shards(burst.duration_ms); }

Zero-Copy Rust SDR Driver Pipeline

The software stack interfaces directly with consumer and industrial SDR hardware (HackRF, RTL-SDR, USRP) through memory-mapped zero-copy DMA buffers. DSP filtering, Hilbert transforms, and Viterbi FEC decoding run with zero dynamic heap allocations on the hot packet path.

// Zero-allocation baseband audio streaming hal.stream_rx_dma(|iq_sample_chunk| { dsp::demodulate_coherent_quadrature(iq_sample_chunk); });

AtmoOS vs. Conventional Communications

Why physical ionospheric reflection provides sovereign resilience that satellites and cellular infrastructure cannot match.

Vector	Cellular / Fiber / Microwave	LEO Satellites (Starlink, Iridium)	AtmoOS Ionospheric Mesh
Physical Vulnerability	Towers easily knocked out, fiber severed	Uplink ground stations vulnerable, ASAT threat	Indestructible (Planetary Plasma Layer)
Central Points of Control	Telco switches, government kill-switches	Proprietary constellations & corporate gateways	Zero (Autonomous Peer Nodes)
Electronic Warfare Resistance	Easily jammed across line-of-sight	Uplink/Downlink jamming on known Ku/Ka bands	DSSS Below-Noise + Cognitive Freq Hopping
Operating Cost	Recurring cellular subscription	Hardware terminal fee + monthly subscription	Zero Recurring Infrastructure Cost