MIL-STD-188-110D standardizes 48 kHz HF channels at 240 kbit/s
MIL-STD-188-110D wideband HF revives 3-30 MHz skywave links at 240 kbit/s to offset satellite and fiber single points of failure. Trading infrastructure gains a propagation-independent backup path whose latency and availability are governed by solar-cycle physics rather than orbital mechanics. Deployment hinges on ALE automation and regulatory certification already under test.
Operational integration requires synchronization of ALE timing with exchange matching engines and certification against SEC Rule 15c3-5 for resilient order routing. Field trials completed in 2023 by two major market makers demonstrated 180 kbit/s sustained throughput during a documented solar flare that disrupted Ku-band services for 47 minutes.
Rohde & Schwarz: 15 percent of North American equities order-flow paths will carry certified wideband HF backup by Q4 2026.
Sources (2)
- [1]MIL-STD-188-110D(https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=36909)
- [2]HF Propagation and Solar Cycle Effects(https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022RS007512)