HF ionospheric propagation data modem with speeds up to 19.2 kbps in STANAG 4539 mode, 500-3000 km BLOS link without satellite infrastructure, MIL-STD-188-141B ALE for automatic frequency selection, and integrated AES-256 encryption.
Morad
Morad HF Skywave HF Skywave Data Modem for Beyond-Line-of-Sight Communications without Satellite
Technical specifications
Technical overview
The Morad HF Skywave is the HF skywave ionospheric propagation data modem designed for the operational scenario where beyond-line-of-sight data communication is imperative and dependence on commercial or military satellites represents a single point of failure — due to access saturation during crisis, intentional GPS signal degradation affecting TDMA satellite system synchronization, or physical destruction of ground segments of the satellite network in high-intensity conflicts.
The modem operates in the HF 2-30 MHz range using ionospheric reflection to establish data links of 500 to 3000 km range without any intermediate infrastructure — no repeaters, no satellites, no microwave towers — with a propagation latency of 3-10 ms, comparable to medium-orbit satellite communication systems but without per-bandwidth access cost. The 19.2 kbps data rate in STANAG 4539 Serial Tone mode is sufficient for compressed operational email, situation reports, target coordinates, compressed intelligence images, and GPS position updates in the JREAP/VMF protocol.
The ALE (Automatic Link Establishment) system conforming to MIL-STD-188-141B continuously scans up to 100 preconfigured frequencies, evaluates ionospheric channel quality in real time via a prediction algorithm based on the geomagnetic disturbance Kp index, and automatically selects and establishes the link on the best available frequency in under 30 seconds — without operator intervention and without requiring the operator to understand ionospheric propagation concepts.
Applications
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Local technical support
EMAR SYSTEMS provides integration, training, and after-sales support for all represented products. Contact the technical team for specifications, demos, and quotes.
100-watt V-UHF 30-512 MHz vehicular software-defined radio with ECCM frequency hopping at 1000 hops per second for jamming and interference resistance, AES-256 per-session key encryption, compatibility with legacy analog and P25 digital radios on the same platform, waveform update via firmware, and MIL-STD-461F certification for electromagnetic compatibility on armored platforms.