UNRESOLVED
CF-GEI-19571200041 UNRESOLVED

The Cognac Air Base Radar Anomalies

CASE FILE — CF-GEI-19571200041 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
1957-12-17
Location Reported location of the sighting or event
Cognac Air Base, Charente, Poitou-Charentes, France
Duration Estimated duration of the observed phenomenon
Two separate events: 30 seconds and 15 seconds
Object Type Classification of the observed object based on witness descriptions
unknown
Source Origin database or archive this case was sourced from
geipan
Witnesses Number of known witnesses who reported the event
4
Country Country where the incident took place
FR
AI Confidence AI-generated credibility score based on source reliability, detail consistency, and corroboration
85%
On December 17, 1957, four military personnel at Cognac Air Base in the Charente department of France detected two separate high-speed radar contacts within 45 minutes of each other. The first event occurred at 15:01 UTC when radar operators observed an unknown object on their scope appearing at 40 kilometers distance and disappearing into ground clutter at 16 kilometers. The total observation time of 30 seconds, covering a distance of 24 kilometers, corresponded to a calculated velocity of 2,880 km/h (approximately 1,789 mph or Mach 2.35 at sea level). At 15:45 UTC the same day, a second radar contact was detected at 37 kilometers, disappearing at 25 kilometers distance. This object was tracked for 15 seconds over a 12-kilometer range, yielding an identical calculated velocity of 2,880 km/h. Two of the four military witnesses prepared an illustrated report with sketches documenting both radar observations. Critically, no visual confirmation of either object was obtained by any personnel at the base. GEIPAN, France's official UFO investigation service operated by CNES (the French space agency), classified this case as 'C' - indicating insufficient information for definitive analysis due to the lack of visual observation to corroborate the radar data. The case represents a dual radar anomaly involving extremely high velocities detected by trained military radar operators at a French air base during the height of the Cold War.
02 Timeline of Events
1957-12-17 15:01
First Radar Contact Detected
Radar operators at Cognac Air Base detect unknown object at 40km distance on scope (15:01 UTC)
1957-12-17 15:01:30
First Contact Lost
Object disappears into ground clutter/fixed echoes at 16km after 30-second observation. Calculated velocity: 2,880 km/h over 24km distance
1957-12-17 15:45
Second Radar Contact Detected
Second unknown radar contact appears at 37km distance (15:45 UTC), 44 minutes after first event
1957-12-17 15:45:15
Second Contact Lost
Object disappears at 25km after 15-second observation. Calculated velocity: 2,880 km/h over 12km distance - identical to first event
1957-12-17 (after events)
Official Report Prepared
Two military witnesses prepare illustrated report with sketches documenting both radar observations. No visual sightings reported by any personnel
Later investigation
GEIPAN Classification
GEIPAN classifies case as 'C' - insufficient information due to lack of visual observation to corroborate radar data
03 Key Witnesses
Anonymous Military Radar Operator 1
Military radar operator, Cognac Air Base
high
French Air Force radar operator stationed at Cognac Air Base. Co-authored illustrated report with sketches documenting the radar observations.
Anonymous Military Radar Operator 2
Military radar operator, Cognac Air Base
high
French Air Force radar operator stationed at Cognac Air Base. Co-authored illustrated report with sketches documenting the radar observations.
Anonymous Military Personnel 3
Military personnel, Cognac Air Base
medium
Third military witness present during the radar observations at Cognac Air Base.
Anonymous Military Personnel 4
Military personnel, Cognac Air Base
medium
Fourth military witness present during the radar observations at Cognac Air Base.
04 Analyst Notes -- AI Processed
This case presents several significant analytical challenges and noteworthy features. The credibility factor is initially high given the military witnesses and radar documentation, yet the classification as 'C' by GEIPAN acknowledges fundamental limitations. The calculated velocity of 2,880 km/h is particularly intriguing - this exceeds the speed of most conventional aircraft of the 1957 era, though certain experimental jets and missiles could approach or exceed this speed. The identical velocities in both events (calculated independently from different distances and durations) suggests either a genuine pattern or a systematic measurement/calculation artifact. The absence of visual confirmation is the critical weakness. Radar-only cases are inherently ambiguous as they cannot rule out equipment malfunction, atmospheric anomalies, signal propagation effects, or misidentification of known objects. The disappearance into 'ground clutter' (fixed echoes) at 16km in the first event suggests the object may have descended to low altitude or the radar lost track due to terrain masking. The timing - two events 44 minutes apart with identical velocity profiles - could indicate: (1) the same object making two passes, (2) multiple objects from the same source, (3) a recurring atmospheric/technical phenomenon, or (4) military aircraft conducting exercises. The preparation of illustrated sketches by witnesses indicates professional documentation, though these documents are not available in the source material for independent verification.
05 Theory Comparison
BELIEVER ANALYSIS
Unknown Aerial Vehicle
The dual radar contacts exhibiting identical, extraordinary velocities of 2,880 km/h represent genuinely anomalous aerial phenomena. The military setting, trained observers, and professional documentation lend credibility. The pattern of two events 44 minutes apart with identical performance characteristics suggests intelligent control rather than random atmospheric effects. The absence of visual observation could indicate the objects operated at extreme altitude, possessed low visibility characteristics, or the events occurred during conditions limiting visual acquisition. The case remains unexplained despite conventional explanations.
SKEPTIC ANALYSIS
Military Aircraft or Missile Test
The most probable explanation is that the radar contacts represent military aircraft conducting high-speed exercises or missile tests. The velocity of 2,880 km/h (Mach 2.35) was achievable by experimental aircraft and missiles in 1957. The identical velocities suggest standardized flight profiles. The absence of visual confirmation could be explained by high altitude, poor weather conditions, or the transient nature of the passes. French or allied forces may have been conducting classified tests, explaining why base personnel weren't informed.
06 Verdict
ANALYST VERDICT
This case most likely represents either a military aircraft or missile test, possibly of experimental or classified nature, or a radar system anomaly. The calculated velocity of 2,880 km/h places it within the performance envelope of advanced 1950s military technology - for context, the French military was operating Dassault Mystère IV fighters (capable of approximately 1,100 km/h) while American aircraft like the F-100 Super Sabre could exceed Mach 1.3. However, missiles or experimental aircraft could easily reach the observed speeds. The identical velocities in both events, while remarkable, could result from standardized flight profiles of test vehicles. Without visual confirmation, atmospheric phenomena causing unusual radar propagation cannot be excluded. The case significance lies primarily in its documentation by trained military observers and official investigation, but the GEIPAN 'C' classification is appropriate - there is insufficient data to reach a definitive conclusion. Confidence level: medium-low that this represents conventional military activity; low confidence in any exotic explanation given the lack of corroborating evidence beyond radar data.
AI CONFIDENCE SCORE:
85%
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