by Richard Godfrey | Dec 18, 2023 | WSPR
It is a well established fact that radio waves can detect aircraft over short distances. Since the demonstration by Robert Watson-Watt and Arnold Wilkins in 1935 detecting a Handley Page Heyford aircraft by using radio signals from BBC Daventry, radar systems are now...
by Richard Godfrey | Nov 22, 2023 | WSPR
WSPR uses High Frequency (HF) ionospheric propagation to send signals around the world. Typical frequencies are in the range 3 MHz to 28 MHz. Transmission power levels are up to 5 W continuous and the duration of the transmission is 110.6 seconds. The US military (Air...
by Richard Godfrey | Aug 31, 2023 | WSPR
MH370 is one of the greatest aviation mysteries of all time. Malaysian Airlines flight MH370 was operated by a Boeing 777 aircraft with the registration 9M-MRO. The aircraft departed Kuala Lumpur International Airport, Malaysia on 8th March 2014 just after midnight at...
by Richard Godfrey | Jun 9, 2023 | WSPR
Qatar Airways flight QTR901 registration A7-BEO departed Perth International Airport on runway 21 on 1st November 2022 at 15:06:50 UTC (23:06:50 AWST local time). There was good weather in the Perth area that evening with a high pressure zone and a surface pressure of...
by Richard Godfrey | Apr 18, 2023 | WSPR
In this case study we analyse the tragic flight of an Alouette II SE313B medical evacuation helicopter registration N45VX, which crashed off the coast of Palawan Island in the Philippines on Wednesday 1st March 2023. The helicopter was known locally as the ‘Yellow...
by Richard Godfrey | Oct 28, 2022 | WSPR
In this case study we analyse the tragic flight of a Cessna 551 Citation II/SP registration OE-FGR, which crashed after fuel exhaustion into the Baltic Sea off the coast of Latvia on Sunday 4th September 2022. The aircraft departed Jerez-La Parra Airport (XRY) in...
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