CORROBORATED
CF-GEI-20130208710 CORROBORATED
The Remire-Montjoly Ariane Shadow Bands
CASE FILE — CF-GEI-20130208710 — CASEFILES CLASSIFIED ARCHIVE
Date Date when the incident was reported or occurred
2013-02-07
Location Reported location of the sighting or event
Remire-Montjoly, French Guiana, France
Duration Estimated duration of the observed phenomenon
several minutes
Object Type Classification of the observed object based on witness descriptions
other
Source Origin database or archive this case was sourced from
geipan
Witnesses Number of known witnesses who reported the event
2
Country Country where the incident took place
FR
AI Confidence AI-generated credibility score based on source reliability, detail consistency, and corroboration
85%
On February 7, 2013, at 18:40 local time in Remire-Montjoly, French Guiana, a witness and their children observed and filmed three parallel dark bands distinctly visible against the lower horizon during an Ariane rocket launch. The phenomenon occurred at twilight and dissipated shortly after appearing. The witness captured video footage of the event, providing documentary evidence of the atmospheric phenomenon.
The observation took place in French Guiana, home to the Guiana Space Centre (Centre Spatial Guyanais), Europe's primary spaceport operated by CNES and ESA. The timing coincided precisely with an Ariane rocket launch, creating ideal conditions for the observed phenomenon. The three parallel lines appeared as straight, dark bands against the twilight sky, maintaining their parallel orientation throughout the brief observation period.
GEIPAN's official investigation concluded this was a textbook example of contrail shadow projection. The phenomenon occurs when dense portions of a rocket's condensation trail are illuminated by the setting sun at a low angle, casting parallel shadows onto the atmosphere or thin cloud layers. The investigation identified identical examples in existing literature, confirmed the sun's position was consistent with shadow projection, and noted the rectilinear appearance matched known shadow phenomena rather than any anomalous object.
02 Timeline of Events
18:40
Ariane Rocket Launch
Ariane rocket launches from the Guiana Space Centre, creating substantial condensation trail in the upper atmosphere
18:40+
Shadow Bands Appear
Witness and children observe three parallel dark bands appearing distinctly against the lower horizon during twilight conditions
18:40+
Video Documentation
Witness films the phenomenon, capturing the parallel dark lines on video
18:42-45
Phenomenon Dissipates
The three parallel lines gradually dissipate as atmospheric conditions change and the sun's angle shifts
Post-event
GEIPAN Investigation Initiated
Official investigation conducted by GEIPAN, analyzing witness testimony, video footage, sun position, and rocket launch data
Post-event
Class A Classification
GEIPAN classifies case as Class A - certain observation of shadows created by sunlight striking dense condensation trail zones from the Ariane rocket
03 Key Witnesses
Anonymous Witness 1
Civilian witness with children
high
Local resident of Remire-Montjoly who observed and documented the phenomenon with family members during a known Ariane rocket launch. Provided video footage.
"Aperçoivent et filment 3 lignes parallèles se détachant nettement sur le bas de l'horizon. Les lignes se dissipent peu après."
04 Analyst Notes -- AI Processed
This case represents an excellent example of GEIPAN's Class A classification system working as intended - a seemingly unusual aerial phenomenon definitively explained through rigorous analysis. The witness credibility is enhanced by the fact they filmed the event and reported it during a known rocket launch, showing awareness of the context. The presence of multiple witnesses (parent and children) provides corroboration, though all were at the same location.
The scientific explanation is particularly robust. Contrail shadow bands are a well-documented optical phenomenon occurring when low-angle sunlight (during sunrise or sunset) strikes the condensation trail of high-altitude aircraft or rockets. Dense portions of the trail block sunlight, projecting parallel shadows onto the atmosphere, thin cirrus layers, or haze. The phenomenon is enhanced at twilight when contrast is maximized. The Ariane rocket's powerful engines produce substantial condensation trails, and French Guiana's tropical latitude (approximately 5°N) provides favorable sunset geometries. The witness's description of 'lignes parallèles se détachant nettement' (parallel lines standing out clearly) perfectly matches the optical characteristics of contrail shadows.
05 Theory Comparison
BELIEVER ANALYSIS
Documented Coincidence Timing
While the official explanation is convincing, a believer perspective might note that rocket launches provide convenient explanatory cover for other phenomena. However, in this case, the video documentation, precise timing correlation, multiple similar documented cases, and optical physics alignment make the contrail shadow explanation overwhelmingly probable. This case actually demonstrates how legitimate unusual phenomena can be properly investigated and explained when sufficient data exists.
SKEPTIC ANALYSIS
Misidentified Rocket Exhaust Plume
A prosaic skeptical view would suggest witnesses simply observed portions of the rocket's exhaust plume itself rather than shadows. However, this explanation is less satisfactory than the shadow theory, as exhaust plumes typically appear bright when illuminated by sunset light, not dark. The witness description of dark bands and GEIPAN's analysis of the visual characteristics both support the shadow interpretation over direct observation of the exhaust trail.
06 Verdict
ANALYST VERDICT
This case is definitively explained with very high confidence as atmospheric shadows cast by the Ariane rocket's condensation trail. The convergence of multiple factors - precise timing with a documented rocket launch, appropriate sun position at twilight, visual characteristics matching known contrail shadow phenomena, video documentation, and comparison with similar documented cases - leaves no reasonable doubt. This case serves as an educational example of how spectacular atmospheric optical phenomena can appear anomalous to observers unfamiliar with the specific conditions. The GEIPAN Class A classification is entirely appropriate. While visually striking and worthy of documentation, this represents explained aerospace-related atmospheric optics rather than an unexplained aerial phenomenon.
AI CONFIDENCE SCORE:
85%
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