SBIR DON27BZ02-NV016 (Navy): Improved Ionosphere D-region Specification for High Frequency Propagation
U.S. Department of Defense — Navy
- Posted
- Nov 13, 2026
- Closes
- Jan 6, 2027 (in 54 days)
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Amount
Amount not listed here. Check the official program.
Who can apply
Small Business. Startup
About this opportunity
Navy SBIR topic — Accepting submissions 2026-12-02 to 2027-01-06. HF and VLF skywave propagation depend on knowledge of the altitudinal structure of the ionosphere for reliable system operation. The D-region ionosphere, a region typically between 60-90 km altitude above the Earth’s surface, is particularly challenging to predict with sufficient fidelity for skywave mission planning because the region is difficult to measure with in situ measurements. Remote sensing methods provide a limited dataset from which to develop detailed physical and assimilative models that can reliably produce the regional behavior on a day-to-day basis. Operational models like the D-Region Absorption Product (D-RAP) produce maps of outage areas as a function of radio frequency (RF) to inform HF system users of ...