Belgian F-16 Radar Trace Charts — March 30–31, 1990 Eupen/Wavre Interception

Brief

On the night of March 30–31, 1990, ground radars at the Glons NATO Control Reporting Centre and Semmerzake ATC tracked unidentified targets over central Belgium; two F-16s scrambled from Beauvechain made nine interception attempts and achieved six confirmed onboard radar lock-ons at 5–8 nautical miles. The recorded traces document targets accelerating from approximately 150 km/h to over 1,100 km/h and shifting altitude between 150 m and 3,000 m within seconds — performance the Belgian Air Force characterized, in its own words, as 'beyond the possibilities of existing technology.' Col. Wilfried De Brouwer, Chief of Operations, presented the declassified charts at a public press conference at NATO HQ in Evere, Brussels, making this one of the earliest official military radar releases on UAP by a NATO member state. The Meessen analysis and Jean-Pierre Petit's 1990 vector redrawings of the same traces remain the principal secondary references.

Metadata

Agency

Belgian Air Force / Force Aérienne Belge (operations under Col. Wilfried De Brouwer)

Release

1990-07-11

Type

IMAGE • .gif

Length

6.8 K

Classification

UNCLASSIFIED

Tags

F-16 radar lock-on, ground radar corroboration, acceleration anomaly, altitude excursion, Belgium, 1990, Eupen, Wavre, Beauvechain interception, NATO CRC, head-up display radar plot

Key points

• Two F-16s were scrambled from Beauvechain air base after both the Glons NATO Control Reporting Centre and Semmerzake ATC independently confirmed unidentified radar returns over central Belgium.
• Nine interception attempts were made across the night, yielding six confirmed F-16 onboard radar lock-ons at ranges of 5–8 nautical miles.
• Recorded radar traces show the UAP accelerating from approximately 150 km/h to over 1,100 km/h within seconds.
• Altitude excursions ranged from 150 m to 3,000 m, with changes occurring within seconds — inconsistent with any known 1990-era aircraft or drone performance envelope.
• The Belgian Air Force formally described the observed kinematics as 'beyond the possibilities of existing technology,' per the description attributed to the Air Force at the time of release.
• Col. Wilfried De Brouwer presented the radar charts at a press conference held at NATO headquarters in Evere, Brussels, on July 11, 1990 — an official, on-record military disclosure.
• The F-16 head-up display radar plots were subsequently reproduced in the Meessen analysis (archived at Astrosurf/Luxorion) and redrawn as vectors by Jean-Pierre Petit in 1990, forming the basis of European UAP literature on this event.

Most interesting

• The Belgian UAP wave of 1989–1990 is the only documented case in which a NATO member air force publicly released onboard radar lock-on data for unidentified aerial targets in near-real time.
• The press conference was staged at NATO's own headquarters in Evere, Brussels — not a domestic Belgian military venue — giving the release an unusual alliance-level institutional framing.
• Six lock-ons were achieved across nine attempts, a hit-rate gap that analysts have taken as evidence the targets responded to or evaded the F-16 lock-on signal.
• The documented acceleration profile — roughly 150 km/h to over 1,100 km/h in seconds — implies g-forces far beyond human physiological tolerance and the structural limits of any known 1990-era aircraft.
• Jean-Pierre Petit, a French plasma physicist and CNRS researcher, produced the 1990 vector redrawings that became foundational reference graphics in European UAP literature for decades.
• The source file is a GIF image with no machine-readable text layer; all quantitative data must be read directly from the plotted radar charts, making independent digitization the only path to further analysis.