SVL Tijdschrift - Jaargang 6 No 19 - jan-april 1987

Magazine Overview

Title: SVLT
Issue: nr. 19
Volume: 6
Date: January/April 1987
Publisher: Studiegroep voor Vreemde Luchtverschijnselen (Study Group for Strange Aerial Phenomena)
Country: Netherlands
Language: Dutch

This issue of SVLT, a quarterly journal dedicated to the study of UFOs and strange aerial phenomena, is primarily focused on the significant 'fireball of September 23, 1986.' The magazine also includes updates to its ongoing catalog of Belgian UFO sightings and mentions upcoming publications and research.

Editorial

The editorial section, dated March 10, 1987, by Wim Van Utrecht, discusses the publication schedule and content of the journal. It announces that the planned fourth part of the article series on Belgian ground traces will be published as a special report in 1988, rather than spread across multiple issues, due to the extensive material. The editor also notes a renewed interest in Europe in para-phenomenology and anticipates new publications, some of which may be sensationalist. A collaboration with the Dutch UFO Study Centre on a Belgian/Dutch contact case is mentioned. Furthermore, the editorial announces two upcoming books: '40 years of UFOs' by Hans Van Kampen, which will include a video cassette, and a book by Marc Hallet focusing on the origins of UFO stories and spectacular natural phenomena. A reminder is given to subscribers whose subscriptions are expiring that a reduced rate applies for renewals.

Table of Contents

The issue's table of contents lists the following articles:

• Editorial
• Old Issues: A list of previously published SVLT issues with highlights.
• Profile Belgium: Corrections and additions to the Belgian UFO sightings catalog.
• The Fireball of September 23, 1986: A detailed report on the event.
• The Eison Report II: A critical commentary.
• Letters to the Editor (Men schrijft ons): Contributions from various readers.
• Recent Sightings: A section on recent UFO reports.
• Announcements (Mededelingen): Information on the Sky Map manual and Congress '87.

Old Issues

A comprehensive list of available back issues of SVLT is provided, with each entry detailing the main topics and specific sightings covered. Prices are listed as 90 BF per issue.

Profile Belgium: Corrections and Additions to Part 3

This section updates the previously published list of 179 Belgian UFO sightings (SVLT 5/17). It emphasizes that the 'Profile Belgium' sections are continuously improved based on new information. The list includes date, time, location, object description, and source codes for each sighting. New cases are marked with a '+'. The total number of UFO sightings for the period 1980-1985 is updated to 190.

The Fireball of September 23, 1986

This article provides a detailed account of the fireball event that occurred on September 23, 1986, at 05:30 UT. The fireball was observed across Western Europe, with sightings reported from Friesland (Netherlands) in the north to Beieren (Germany) in the east, and from Paris (France) to the Black Forest (Germany). In England, two fishermen in Daventry witnessed the phenomenon. The article presents various explanations offered by different authorities and individuals:

• Belgian KMI (Royal Meteorological Institute): Initially suggested exhaust trails from an F-16, an explanation reportedly provided by the Technical Air Force School in Safraanberg.
• Eindhoven Air Base Meteorologist: Proposed a fata morgana, a mirage caused by sunlight reflecting off a hazy atmospheric layer.
• German Astronomers: Suggested the disintegration of a meteorite.
• Luxembourg Police and Air Force: Referred to it as a 'stray rocket' possibly fired during a NATO exercise.
• Belgian 'Experts': Noted that the object's invisibility to radar indicated it might be an American experimental rocket with Stealth technology.

Media Coverage: The BRT (Belgian Radio and Television) news reported the event as a 'kind of UFO.' Weatherman Armand Pien initially stated it was not a UFO and that it could not be a satellite because it appeared to make a turn over Brussels. Later, he revised his opinion, suggesting it was likely a satellite or rocket fragment disintegrating in the atmosphere, creating the illusion of a turn.

Newspaper Reports: The following day, most Belgian newspapers reported the event as a burning satellite, possibly the Russian MOLNIA launch vehicle or the COSMOS 1736. Some mentioned a Japanese satellite but noted it was not in the correct orbit.

Armand Pien's Final Opinion: In an article in 'Gazet van Antwerpen' on October 20, 1986, Pien concluded that the object was the launch rocket of the Russian satellite MOLNIA. He explained that friction with atmospheric molecules caused a spectacular fiery display, with the heat vaporizing the metal, resulting in yellow, blue, and green colors.

Scientific Discrepancy: Researchers from the Belgian Institute for Space Aeronomy, the Dutch Meteor Society, the Association for Astronomy, and the European Space Agency (ESA) had concluded that no satellite re-entry was scheduled for September 23.

Eyewitness Accounts from Different Regions:

• Netherlands: Observers described it as a 'fiery rocket' or 'large fireball,' with one witness in Friesland reporting a light trail. Colors observed included green, greenish-blue, and violet.
• France: Thousands in Paris saw a formation of approximately 10 green and turquoise light points. A pilot over the Seine compared its speed to that of an aircraft.
• Luxembourg: Police officers reported seeing 5 to 6 light green objects.
• England: Two fishermen in Daventry observed six objects flying behind a larger object. Simon Vinkencog reported this sighting in 'Bres.'
• Belgium: Witnesses reported a series of bright lights flying in sequence, resembling a fiery trail. The number of reported objects varied from 2 to 15, with a larger object at the front. Colors described were blue, green, yellow, and red. Three eyewitness sketches from the Kempen region are included, depicting objects with 'pieces jumping off' and 'springing apart.'

Radar Visibility: Most newspapers reported the phenomenon as invisible to radar, adding to the mystery. However, the French Centre National d'Etudes Spatiales reported that the American NORAD radar installations had registered the fireball. The magazine NADGE (NATO's radar and air defense system) also reportedly tracked the object.

Trajectory Analysis: Bertus Kroon, a satellite expert from the Kootwijk observatory, used a computer system and 35 observations to calculate the object's trajectory. The analysis suggested the object entered the atmosphere on September 23, 1986, at 05:31 UT, at an altitude of approximately 70 km and an angle of 6°. This entry angle is described as rare, reminiscent of an Apollo capsule re-entry. The fireball was visible for about 60 seconds, reaching its lowest point west of Brussels at 05:32:08 UT. The trajectory analysis revealed a peculiar behavior: the object initially descended but then 'bounced' slightly upwards due to atmospheric resistance before commencing its final descent at approximately 8.5 km/sec. A higher entry speed would have caused it to skip out of the atmosphere or undergo a different type of re-entry.

The Eison Report II: A Critical Commentary

This section provides a critical commentary on the 'Eison Report II,' which likely refers to a specific UFO sighting or case documented in a previous issue (SVLT 5/18).

Announcements

Information is provided regarding subscriptions, including a reduced rate for renewals and details for bank transfers. A note indicates that subscriptions are ending for some readers.

Copyright

The copyright notice states that no part of the publication may be reproduced without written permission from the publisher. It clarifies that the content of SVLT is determined by the editor, but the opinions of contributors do not necessarily reflect the stance of the editor or the study group.

Recurring Themes and Editorial Stance

The recurring themes in this issue are the detailed investigation of a significant aerial phenomenon (the 1986 fireball), the cataloging and correction of UFO sightings (Profile Belgium), and the critical analysis of UFO-related reports (Eison Report II). The editorial stance appears to be one of rigorous investigation, presenting factual accounts, scientific analysis, and diverse perspectives while maintaining a critical approach to sensationalism. The journal aims to provide a platform for the study of UFO reports and related phenomena.

This issue of the magazine presents "HET EISON-RAPPORT: EEN KRITISCHE KOMMENTAAR - II" by Wim Van Utrecht, focusing on the second part of a critical analysis of a photographic report concerning a potential UFO sighting. The issue is dated November 1986 and is presented as part of the 'SVLT 5/18' series.

Analysis of the Eison Report

The article begins by referencing the first part of the article, which described the circumstances under which the photos and report came to light. Wim Van Utrecht's article aims to find a non-mysterious explanation for a 'dot' visible in a photograph. The analysis involves the work of Ronny Blomme, who verified the mathematical analysis performed by Guido ABTS on the photo.

1. The circumstances under which the photo was discovered

It is revealed that Guido ABTS was not randomly searching his photo collection for 'strange objects in the sky.' He had recently purchased a UFO photo book by Schneider & Malthaner, which featured a photo allegedly taken on July 26, 1975, in Saas-Fee, Switzerland. ABTS recalled being in the nearby town of Eison during the same period and having taken many photos from that vacation. He stated that he searched his photo collection, which was then 8 years old, for 'objects in the sky,' specifically trying to gather all possible 'dots.' Out of 662 photos examined, two were selected: a slide and a pocket photo. Coincidentally, both were taken on the same afternoon, July 26th, from the same balcony.

2. The pocket photo

This photograph, referred to as Photo "X," shows a small, dark brown dot, approximately 0.2 mm in size on the negative. The spot stands out sharply against a light blue background. The article presents magnified views of the dot, showing its shape at 65x and 739x magnification. According to source (1), this photo was taken at approximately 15:04 ZWWT (14:04 UT), with an error margin of one minute provided by ABTS.

3. The slide

The second document, Photo "V," shows a vague, dark blue spot. Guido ABTS writes that he later remembered a large black bird that should have been visible at a great distance. When projected, it did not appear that way. Instead, it looked like a blue top with a dark blue shaded underside. A 65x magnification of the slide, taken in December 1982, showed the bird in three different positions, with its wingtips touching above its back. The rapid movement during exposure created an effect where the sky's color dominated the black of the bird, resulting in a blue appearance. The bird measured approximately 0.75 mm on the negative. At 65x magnification, the image is presented.

According to source (1), this slide was taken between 16:00 and 18:00 ZWWT (15:00 and 17:00 UT).

4. Comparison of shadow parts in the photo and slide

At the time Photo "X" was taken, the sun was in the southwest. The article presents calculations for the sun's position based on Ronny Blomme's analysis and Guido ABTS's calculations. The direction from which the photo and slide were taken was South-Southwest (SSO). Both photos show a building with a chimney on the roof in the foreground, and the direction of the chimney's shadow aligns with the sun's position. A schematic representation illustrates this.

Guido ABTS claims that at least one hour passed between taking the photo and the slide. Patrick Vantuyne, an SVL correspondent from Moorslede, suggested comparing the shadows in both photos to verify this. The chimney serves as an interesting object for comparison, acting as a 'sundial' or 'gnomon.'

In one hour, the sun moves 15° across the sky, causing shadows to shift by the same amount in the opposite direction. A comparison of the chimney's shadow in Photo "X" with that in Photo "V" shows that both shadows exhibit the same aspect and point in nearly the same direction. However, the shadow in Photo "V" is slightly longer and more southerly oriented. Considering the direction of the incoming sunlight, the article concludes that Photo "V" was indeed taken after Photo "X."

Figures 5 and 6 visually compare the chimney shadows in both photos and their respective schematic representations. Despite the visual comparison, the article notes that it is practically impossible to calculate the exact time interval between the two shots due to the very slight shift in the shadow. Several factors are mentioned that could influence the interpretation:

• A. The photographer's displacement: The photographer moved up to 5 meters to the left when taking the slide, meaning a smaller portion of the shadow behind the chimney would be visible. The fact that the two shots were not taken from the exact same point also contributes to the difference in shadow length.
• B. Unclear contours: When magnified, the shadow's edge becomes blurry, making precise measurements difficult. This is further complicated by the unevenness of the roof tiles distorting the shadow's outline.
• C. The slanted roof: Viewing the scene against a sloping roof creates a perspective distortion, making equal distances appear to converge upwards. This could affect the visibility of a 15° shadow shift.

Figure 7 provides a schematic representation of the chimney as a gnomon and the roof as a slanted plane, illustrating the potential shift of the shadow by 60 minutes or 15°.

Conclusion of the shadow analysis

While the incoming sunlight shifts from Z1 to Z2, the gnomon's shadow moves from S1 to S2. The path of the sun after 60 minutes is represented by angle $eta$, and the shadow's path by angle $eta'$. Despite the perspective effect, the shadow shift is considerable. However, the article states that the shift is almost imperceptible in Photos "X" and "V" (Figures 5 and 6).

Conclusion: Guido ABTS claims Photo "X" was taken around 15:04 and Photo "V" between 16:00 and 18:00. However, the comparison of the shadows suggests that both photos were taken around the same time. Considering factors A, B, and C, the time difference could be on the order of a few minutes, but certainly not an hour.

5. Conclusions

The study group's conclusions from their investigation are threefold:

1. The eyewitness accounts are inconsistent: No one can precisely recall what was observed. One of the observers rejects the assumption that it was a 'UFO.' In a letter dated November 3, 1986, Guido ABTS writes: "The object was indeed visually observed first. It was at that place and disappeared on the spot like a lamp being switched off... But I don't know anything more about it." The article questions the reliability of memories recalled years after the events. A letter from April 1986 might offer more insight into the circumstances of the observation. ABTS writes: "In any case, I know for sure that the photo of the mountain bird taken later that day was considered by me as a second chance to photograph a mountain bird. Moreover, the bird came much closer." The question is raised whether the dot in the Eison photo is nothing more than the mountain bird for which ABTS thought no successful photo existed?

2. The disc shape of the dot in the photo remains unproven.

Recurring Themes and Editorial Stance

This issue critically examines a UFO sighting through photographic analysis, emphasizing a rational, scientific approach. The editorial stance is skeptical of extraordinary claims, preferring to explore natural explanations like meteorites, satellites, or misidentification (e.g., a bird). The article highlights the importance of rigorous analysis of evidence, questioning eyewitness testimony and photographic interpretations when they lack corroboration or are contradicted by physical evidence and scientific principles. The magazine appears to be dedicated to debunking or providing logical explanations for phenomena often attributed to UFOs, promoting a grounded perspective on such events.

This issue of "MEN SCHRIJFT ONS..." (We Are Written To...) features a critical commentary on UFO reports, specifically focusing on the Eison and Saas-Fee photographs. The content is primarily in Dutch and appears to be from the late 1980s, with dates such as February 1987 and August 1986 appearing.

Analysis of the Eison and Saas-Fee Photos

The core of the issue revolves around the analysis of a photograph taken in Eison, Belgium, and its comparison to a photo from Saas-Fee, Switzerland. Ronny BLOMME and Wim VAN UTRECHT present critical perspectives on the work of Guido ABTS, who had previously analyzed the Eison photo.

Guido ABTS's Analysis and Criticisms

Guido ABTS's analysis of the Eison photo suggested a large, symmetrical object (20m diameter, 5m height) with apparent asymmetry due to sunlight reflection. However, Ronny BLOMME, in his commentary, dismisses these findings as unsustainable. BLOMME points out that the calculated distance is entirely fictitious, resulting from a rounding error. He also argues that the reflection model does not explain the object's asymmetry.

BLOMME presents figures (Fig. 8 and Fig. 9) to illustrate his point. Fig. 8 shows a 'flying saucer' model proposed by ABTS, while Fig. 9 is a photograph of a flock of birds. BLOMME suggests that with some imagination, one could find 'UFOs' within the bird photo, each with a 'mysterious halo,' which he attributes to a photographic effect of the printing process.

Mathematical Re-evaluation by Ronny BLOMME

Ronny BLOMME provides a detailed mathematical re-evaluation of ABTS's calculations, aiming to demonstrate the unreliability of ABTS's results. He meticulously recalculates ABTS's steps, emphasizing the importance of using more decimal places to avoid significant rounding errors. BLOMME shows that by carrying more precision through the calculations, the estimated distance can increase dramatically, suggesting that ABTS's method is fundamentally flawed and the results are meaningless.

BLOMME states that by carrying only three extra decimal places, the estimated distance becomes 50 times larger than ABTS's figure. He concludes that his own commentary in SVLT 5/18 demonstrated that the correct result should be P = 00, a conclusion also reached by Mr. P. Vantuyne.

The Reflection Model

Regarding the reflection model, BLOMME states he has nowhere assumed that the normal to the ellipsoidal surface was the same as the normal determining the angle between incident and reflected rays. He acknowledges that imperfections on the surface could lead to a normal lying in the same plane as the incident and reflected rays, but argues these imperfections cannot be so large as to shift the reflection point significantly. If they were, the object could not be approximated by an ellipsoid, rendering the entire reasoning invalid.

BLOMME also considers the possibility of asymmetry arising from the object appearing and disappearing in place, a phenomenon observed by witnesses more recently. He notes that this aspect was not fully clear in earlier reports.

Conclusion on Eison and Saas-Fee Cases

BLOMME concludes that ABTS's report is 'brilliant and correct' in its presentation, but fundamentally differs from his own basic concept, despite drawing similar conclusions. He highlights that the greatest difficulties lie in solving this problem, which is not a simple mathematical one but rather a process of 'guessing and missing,' working with approximations and determining the most probable results. He suggests that to avoid such issues, multiple exposures or stereo photography should be mandatory.

Hans Van Kampen's Critical Commentary

Hans VAN KAMPEN also offers a critical perspective, particularly on the Eison photo. He expresses surprise at the article and states he is not a prominent UFO researcher, thus approaching the topic without bias. He questions the premise that UFO reports are unique and unusual phenomena, noting that images can be more convincing than stories, but also acknowledging the ease with which UFO hoaxes can be created.

VAN KAMPEN criticizes the lack of essential information in the reports from Saas-Fee and Eison, making it impossible to draw valid conclusions from the visual material. He observes that some researchers focus too much on the object itself rather than the surrounding circumstances, using mathematical games with quasi-data to camouflage obvious flaws in the reports.

He emphasizes the need for detailed information, such as the precise location of the observers, the time of observation, their viewing direction, and how the object moved. He notes that such details, often supported by maps and environmental photos, are missing in both the Eison and Saas-Fee cases.

VAN KAMPEN questions the claim that witnesses could immediately take a photo of a strange object. Based on his experience, he states that witnesses often need time to react and might not capture the initial moments of a sighting. He also points out two phenomena: the object's slow movement, allowing for multiple shots, and the tendency for truly strange objects at high altitudes to be seen by many people.

He specifically addresses the Saas-Fee photo, questioning the reported time of observation (3 PM) based on shadow analysis, suggesting it might have been taken in the morning. He also notes that the object's position and movement described do not align with the visual evidence in the photo. He suggests the object was relatively close and small, with its appearance influenced by ambient light and sky reflection.

VAN KAMPEN's preliminary conclusion on both cases is "devastating," stating that the reports provide insufficient data for further evaluation and are vague and dubious. He laments that serious UFO research often gets bogged down in analyzing vacation photos of blurry objects like birds or traffic signs, rather than pursuing more substantial evidence.

He asserts that the burden of proof lies with the witness, who must provide solid and meaningful facts to support their claims, which are absent in these cases. He concludes that serious UFO research is more than just a game of 'guess where it is.'

Historical Context: Flying Wing Aircraft

One section of the magazine delves into the history of 'flying wing' aircraft designs. It mentions:

• Northrop YB-49: A flying wing bomber from the late 1940s.
• Stealth ATB: A new Northrop creation, planned for test flights in 1987, with a less pronounced boomerang shape.
• Delta Wing Spanloader: A triangular cargo aircraft by Lockheed-Georgia, planned for use by 1995.
• Armstrong Whitworth Experimental Tail-less Monoplane: A British boomerang-shaped aircraft from the late 1940s, with limited flight data after 1953.
• German 'Flying Wings of Horner': Experiments during World War II, with the fate of the designs unknown.

The article notes that the 'flying wing' concept has endured and mentions reports of large, boomerang-shaped objects with bright lights seen in the eastern United States since 1983. However, it cautions against drawing a direct link to secret 'flying wing' flights, as some researchers suggest these sightings might be misinterpretations of personal aircraft flying in formation.

Recurring Themes and Editorial Stance

The recurring themes in this issue are skepticism towards UFO claims, rigorous scientific and mathematical analysis of photographic evidence, and the importance of detailed, verifiable data in UFO research. The editorial stance is clearly critical and analytical, emphasizing that extraordinary claims require extraordinary proof and that many UFO reports lack the necessary rigor. The magazine seems to advocate for a more grounded and evidence-based approach to UFO investigation, distinguishing it from speculative or pseudoscientific endeavors. The inclusion of the 'flying wing' aircraft history adds a layer of technological context, possibly to contrast with or provide an alternative explanation for some UFO sightings.

This issue of the SVL Tijdschrift, identified as No.6/19, published in September 1986, focuses on "Recente Meldingen" (Recent Reports) of UFO and strange aerial phenomena. The SVL (Group for Study of Strange Aerial Phenomena) aims to investigate such reports scientifically. The magazine includes detailed accounts of sightings from late 1986, primarily from the Netherlands and Belgium, along with the SVL's evaluations.

Recent Reports

The issue details several recent sightings:

• Heiligerlee (Groningen), October 22, 1986: Five witnesses reported a large aircraft with five red stationary lights and a bright white searchlight moving slowly and silently at tree-top height. The SVL evaluation suggests it was a helicopter, a conclusion also supported by the Dutch Civil Aviation Authority.
• Wedde (Groningen), October 24, 1986: A young farmer reported seeing three bright red fireballs, with two being reflections, moving slowly horizontally at low altitude. The SVL evaluation is "Insufficient".
• Blijham, Bellingwolde (Groningen), October 24, 1986: A family in a car reported seeing a large, slightly elliptical orange-red disc-shaped object moving from west to east, appearing to hover over a 'sex-boerderij'. The SVL evaluation is "Insufficient".
• Oude Pekela (Groningen), October 24, 1986: An elderly couple reported seeing a red fireball ascending near Oude Pekela. The SVL evaluation is "Insufficient".
• Oudenaarde (Oost-Vlaanderen), mid-November 1986: The newspaper Het Volk reported a rocket-like object sighted above Oudenaarde. The SVL evaluation is "Insufficient (-experimental rocket, meteor)".
• Oudenaarde (Oost-Vlaanderen), around November 21, 1986: A witness described seeing a rocket with fiery red flames, flying about twenty meters above the ground, moving horizontally. The article "Ik heb een raket gezien" (I saw a rocket) from Het Volk is included, detailing the event and witness accounts, including the discovery of a small rocket labeled "Flying arrow rocket".
• Almere (Gelderland), December 10, 1986: A witness reported seeing an orange-lit object hovering silently, leaving smoke and steam behind. The SVL evaluation is "Insufficient (-astronomical)".
• Almere (Gelderland), December 14, 1986: A bright orange light ball was seen descending from the sky and crashing into the IJsselmeer. The SVL evaluation is "Insufficient (-meteorite impact)".
• Doesburg (Gelderland), December 16, 1986: A policeman observed a series of light 'dots' moving from east to west across the sky. The SVL evaluation is "Insufficient (-birds)".
• Bussum (Noord-Holland), December 17, 1986: A witness in a hospital bed saw a spherical object with flashing lights moving statily in a northerly direction, which then returned and disappeared. The SVL evaluation is "Insufficient (-interesting)", suggesting further investigation.
• Ommen (Overijsel), December 22, 1986: A V-shaped object was reported circling a school. Another observer saw the planet Jupiter. The SVL evaluation is "Insufficient (-birds)", suggesting a flock of birds or bats.
• Harderwijk (Gelderland), December 24, 1986: A large, diamond-shaped object with red-orange lights was observed, described as being like a setting sun. The SVL evaluation is "Insufficient (-interesting)", noting a possible correlation with a departing flight from Schiphol.
• Antwerpen, Schoten (Antwerpen), January 11, 1987: A high-flaring glow above the port area was identified as a flame from a petrochemical company, exacerbated by the cold, clear air. The SVL evaluation is "Flame from petrochemical plant".

The Fireball of September 23

This extensive report details a massive fireball observed over Western Europe on Tuesday, September 23, 1986, around 05:30 UT. Thousands witnessed the event across Belgium, the Netherlands, France, and West Germany. Initial explanations from the Belgian Royal Meteorological Institute (KMI) included an F-16 fighter after-burn or a plasma-like phenomenon. The Air Force base in Eindhoven suggested a fata morgana. Police and Air Force circles in Luxembourg considered it a stray NATO rocket. Some Belgian "experts" speculated about an experimental American device with Stealth technology. The Belgian radio announced a "UFO" had crossed the skies. Armand Pien, a prominent meteorologist, stated it was the re-entry of a Russian rocket-stage burning up in the atmosphere.

However, the following day, newspapers reported the fireball was not expected by astronomers. The phenomenon was observed from West Germany as a ball of fire with two long tails. Dutch observers described it as a "fiery rocket" or "great ball of fire" with colors ranging from green to violet. In France, thousands in Paris saw a formation of green and turquoise points of light. Luxembourg police reported bright green lights. English fishermen described six objects flying in formation behind a larger one. Belgian witnesses reported bright lights with short tails forming a fiery trail, with numbers varying from 2 to 15 objects, often with a larger object on top. Colors reported included blue, green, yellow, and red. One witness in Hamme-Mille saw the fireball break in two.

The report highlights that the phenomenon was generally not tracked by radar, adding to the mystery. However, the French Centre National d'Etudes Spatiales announced that the American Space Defence System (NORAD) did register it. A journalist from Panorama found it was tracked by NADGE, NATO's radar and defence system.

Bertus Kroon, a satellite expert, reconstructed the flight path using computer analysis of 35 sighting reports. The object entered the atmosphere at latitude 50.23° and longitude -348.62° at an altitude of approximately 70 km, visible for about 60 seconds. It reached a position west of Brussels before its final descent. Intriguingly, the trajectory suggested the object descended, then bounced off the atmosphere slightly before resuming its fall.

The SVL concludes that the phenomenon likely represents the disintegration of a meteorite or rocket-stage. The "satellite hypothesis" was deemed improbable due to the lack of expected re-entry and the east-to-west trajectory. The change of direction reported by witnesses near Brussels is discussed, with possibilities including observer judgment errors, a slightly curved path due to atmospheric conditions (varying densities, air currents, temperature), or even the Magnus effect if the object was rotating. A third possibility is that the meteor broke into two parts, each following its own course.

The media coverage of the event is criticized for its lack of familiarity with existing documentation on similar fireball occurrences.

Profile Belgium 1980-1985

This section provides corrections and additions to a previously published list of 179 Belgian UFO reports. The total number of Belgian reports for the period 1980-1985 is now 190, with only 8 cases remaining truly problematical after investigation, classified as "INTERESTING". A statistical analysis is underway.

Mededelingen (Announcements)

• Sky Map Manual: A tool for serious UFO researchers is available, consisting of star charts to help identify astronomical phenomena. Users can send observation details to Ronny Blomme for a custom star chart or obtain an English manual.
• Congress '87: Announcement of the 4th International UFO Congress in London from July 10-12, 1987, featuring various speakers, seminars, a dinner, and a film program. Registration details are provided.

Recurring Themes and Editorial Stance

The recurring theme throughout this issue is the reporting and analysis of unexplained aerial phenomena, primarily UFO sightings and fireballs. The SVL maintains a scientific approach, attempting to correlate witness accounts with known astronomical or man-made events, while acknowledging the possibility of genuinely unexplained occurrences. The editorial stance appears to be one of thorough investigation and critical evaluation, often expressing disappointment with media sensationalism or superficial explanations. The emphasis is on gathering data, analyzing trajectories, and seeking verifiable evidence, even when initial explanations are inconclusive.

Title: SVLT
Issue: VIII
Date: 1987
Country: Netherlands
Language: English

This issue of SVLT features a detailed re-examination of the famous Kenneth Arnold UFO sighting from June 24, 1947. The article, titled "Case #17 Revised: What did Kenneth Arnold really see?" by Hans van Kampen, challenges the conventional interpretation of the sighting as evidence of extraterrestrial craft.

The Kenneth Arnold Sighting

Kenneth Arnold, an American businessman, reported seeing nine "flying saucers" over the Mount Rainier range near Seattle. This event is widely considered a pivotal moment in UFO history, popularizing the term "flying saucers." The objects were described as moving in a chain-like formation, resembling "geese," and flying at an altitude of approximately 9500 feet. Arnold noted their rapid movement, which led him to initially consider them jet aircraft, but he was puzzled by the absence of tails. He described them as "crescent shaped" and observed them "flipping and flashing in the sun," appearing to bounce like "skipping saucers over water."

The Arnold Myth and Re-evaluation

Hans van Kampen argues that the case was never thoroughly investigated and that Arnold's account has been mythologized. While attending a SCICOP meeting in Washington, D.C. in 1978, van Kampen accessed files at the U.S. National Archives, including the former USAF 'BlueBook' archives, where the case was filed as "Case #17."

Van Kampen suggests that Arnold's estimates of distance and speed were significantly exaggerated, contributing to the mystery. He references Professor J. Allen Hynek's 1956 review for 'Project Bluebook,' which concluded that Arnold had overestimated the visibility, size, and speed of the objects. Hynek's calculations indicated that if the objects were as far away as Arnold claimed, they would have been too small to be seen by the human eye. This implies the objects were much closer and moving slower than Arnold initially perceived.

The "Unknown Aircraft" Theory

Van Kampen posits that Arnold did not invent the term "flying saucers" but was attempting to describe unknown aircraft. He proposes that Arnold may have witnessed the first operational deployment of Republic F-84 Thunderjets. These jets, which entered production after a test flight on February 28, 1946, had straight wings (not slanted), were unstable at high speeds, and featured a bottle-like fuselage with a small tail. Crucially, they were a military secret during the 1945-1948 period.

To support his theory, van Kampen used computer modeling, inputting the dimensions of the F-84 jet, daylight conditions, and snow reflectivity. He created computerized representations of the jet and compared them with Arnold's own drawings. The comparison revealed a striking resemblance, particularly when the jet was depicted coming from the left and moving away, showing a "sort of peak" at the rear trailing edge. The "crescent shape" interpretation is also explained by the jet's configuration.

Van Kampen further suggests that Arnold's perception of a triangular shape when the objects passed at a distance along the snow-covered Mt. Rainier could be attributed to the limits of visual acuity. If the objects were indeed around 6 to 8 miles away, as Hynek's calculations suggested, their speed of approximately 350 miles per hour would not have been abnormal for these jets.

Conclusion and Editorial Notes

Van Kampen concludes that after 40 years of UFO history, these facts remained unknown, and he labels the Kenneth Arnold sighting a "myth," criticizing modern research and authors who continue to assert its authenticity. The issue also includes an announcement about the future publishing plans of SVLT, which will shift to detailed, single-subject reports starting in 1988, moving away from its current article series format. The announcement also mentions an exhibition in Eindhoven, Netherlands, called "INSIDE THE SPACESHIP" at the EVOLUON, and provides updated contact information for CUFOS and GESAG.

Recurring Themes and Editorial Stance

The recurring theme in this issue is the critical re-examination of classic UFO cases, particularly the Kenneth Arnold sighting. The editorial stance is skeptical, favoring rational explanations based on known technology and human perception limitations over extraordinary claims of extraterrestrial visitation. The publication aims to provide in-depth, research-based analysis to debunk or clarify historical UFO phenomena.