lastdingo
Blogger http://defense-and-freedom.blogspot.de/
Rafael Helispot is/was an Israeli system for non-line of sight infrasound detection and triangulation of battlefield helicopters that was developed in several marks.
All I have about it is this:
https://irp.fas.org/agency/dod/jason/infrasound.pdf
mentions possible further source: "Srour, N. “HELISPOT MKII Evaluation of Helicopter and Ground Vehicle Detection”, US Army Research Laboratory, undated briefing"
https://defense-and-freedom.blogspot.com/2016/10/acoustic-sensors.html
which embedded this marketing brochure about Helispot: https://de.scribd.com/doc/6956942/Helispot
https://web.archive.org/web/2011082...ael.co.il/Marketing/186-931-en/Marketing.aspx
https://web.archive.org/web/2005103...el.co.il/web/rafnew/products/air-helispot.htm
All I have about it is this:
https://irp.fas.org/agency/dod/jason/infrasound.pdf
mentions possible further source: "Srour, N. “HELISPOT MKII Evaluation of Helicopter and Ground Vehicle Detection”, US Army Research Laboratory, undated briefing"
https://defense-and-freedom.blogspot.com/2016/10/acoustic-sensors.html
which embedded this marketing brochure about Helispot: https://de.scribd.com/doc/6956942/Helispot
https://web.archive.org/web/2011082...ael.co.il/Marketing/186-931-en/Marketing.aspx
https://web.archive.org/web/2005103...el.co.il/web/rafnew/products/air-helispot.htm
- infrasound (non-line of sight)
- 360° coverage (all directions at same time, nothing rotates)
- 3° bearing accuracy
- up to 20 km range (minimum achievable range appears to be 4 km), very likely much-dependant on atmospheric conditions, esp. wind direction and speed, smallest claimed range was against MD 500 (known to be a rather silent helicopter, esp. with hush kit, it was likely tested against the MD 500M/TOW Defender that were in IDF use)
