28 June 2021 to 2 July 2021
Europe/Vienna timezone

Observing military aircraft activity with the Romanian infrasound arrays

P1.1-458
29 Jun 2021, 09:00
3h
Online

Online

e-Poster T1.1 - The Atmosphere and its Dynamic T1.1 e-poster session

Speaker

Ms Daniela Ghica (National Institute for Earth Physics (NIEP), Magurele, Romania)

Description

Presently, National Institute for Earth Physics operates two infrasound stations deployed on the Romanian territory: IPLOR 4-element array of 0.6 km aperture, and, under cooperation with AFTAC (USA), BURARI 6-element array of 0.7 km aperture.
As many military bases are deployed across Europe and Near East region, signals from supersonic aircraft activity are detected routinely at the Romanian infrasound stations. These signals are observed from short/local ranges (140 km) to long-distance ones (2200 km). Several directions of interest were identified: NW (North Sea, Germany), NNW (Norwegian Sea, Northern Norway), NNE (NE Ukraine- NW Russia), SSE (Aegean Sea), SE (Turkey, Sinai Peninsula). Moreover, the two arrays frequently observe supersonic jets flying from military bases located in Romania.
Sonic booms generated by military aircraft could be localized by cross bearing the detections of IPLOR and BURARI arrays. The information released on military exercises and LEB bulletins is used to validate the locations. At local distances, the sonic boom appears as an infrasonic pulse dominated by high frequencies (above 1 Hz), while, for long-ranges, lower frequency drops below 1 Hz as the higher frequency components are rapidly attenuated. Statistical analysis of wave parameters (trace velocity, azimuth, frequency, amplitude) shows seasonal and daily variations.

Promotional text

As many military bases are deployed across Europe and Near East region, signals from supersonic aircraft activity are detected routinely at the Romanian infrasound stations IPLOR and BURARI. These signals are observed from short ranges (140 km) to long-distance ones (2200 km).

Primary author

Ms Daniela Ghica (National Institute for Earth Physics (NIEP), Magurele, Romania)

Co-authors

Mr Constantin Ionescu (National Institute for Earth Physics (NIEP), Magurele, Romania) Ms Mihaela Popa (National Institute for Earth Physics (NIEP), Magurele, Romania)

Presentation materials