SeriesSubmarine target strength, explained1 article so far; more to come.
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Target strength · Article 1
What an echo can tell a sonar, and three assumptions that make it computable
Who needs the echo figure and why, what an echo carries, and the three assumptions behind a computable target strength.
22 October 2026
Working note · SSR-Sim
SSR-Sim: what a submarine's sonar echo is made of
A generic 66 m double hull: 43 dB on the beam at 5 kHz, where the echo comes from, and what a coating buys.
19 October 2026
Dataset note · on suniltyagi.in
A physics-grounded synthetic underwater acoustic dataset ↗
12,000 clips from first-principle acoustic models, verified in physical units; on Hugging Face with a DOI.
23 September 2026
Working note · on suniltyagi.in
DEMON analysis: reading a vessel's propulsion from its own noise ↗
Shaft rate and blade rate from cavitation noise, the reading discipline, and the open toolkit.
7 July 2026Every note describes methods at an unclassified, headline level. Notes marked ↗ are hosted on suniltyagi.in, the founder's scholarly site.