Within Woomera Radar
Could Woomera's Radar Really Measure 3,600 mph?
The famous speed and altitude claims depended on one radar return, operator timing and assumptions that surviving records cannot test.
On this page
- How the speed and height figures were derived
- Radar effects that can mimic fast targets
- Why missing calibration and tracking records matter
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Introduction
The celebrated claim that Woomera radar tracked an object at approximately 3,600 mph on 5 May 1954 sounds highly precise, but the surviving evidence is much less exact than the figure suggests. The reported speed was not read directly from the radar. Instead, it was calculated by a radar operator from an estimated distance travelled over a measured time interval. Because the original radar plot, calibration records and supporting technical documentation have not survived in the publicly available files, later researchers cannot independently verify either the measurement or the assumptions behind it. As a result, the radar report remains an important historical document within South Australia’s UFO history, but the famous speed estimate should be treated as a calculation based on a single observation rather than as a fully validated instrumental measurement.[Project 1947]project1947.comProject 1947PROJECT 1947: Keith Basterfield - LISTING OF REPORTS FROM WOOMERA, SOUTH AUSTRALIA…
Could Woomera’s Radar Really Measure 3,600 mph?
The original statement by Staff Sergeant George Trotter reported that an unidentified target appeared on an AA No. 4 Mk. 6 anti-aircraft radar at roughly 60,000 yards, followed a curved path over the radar position and then moved eastwards. Trotter wrote that he timed the target over 15,000 yards in ten seconds, producing a calculated speed of approximately 3,600 mph. He also inferred that the object was above 60,000 feet because it remained detectable on the radar’s high beam out to around 70,000 yards.[Project 1947]project1947.comkb uasgovProject 1947PROJECT 1947: “UNUSUAL AERIAL SIGHTINGS” A SEARCH THROUGH THE AUSTRALIAN GOVERNMENT’S RECORDS SYSTEMS…
The wording of the statement is significant. It does not say that the radar automatically displayed a speed. Instead, it records the operator’s own calculation from two quantities:
- an estimated distance travelled (15,000 yards);
- a manually timed interval of ten seconds.
That distinction matters because any uncertainty in either figure directly affects the resulting speed estimate. A small timing error or uncertainty in precisely where the target entered and left the measured segment would noticeably change the calculated velocity.
The reported altitude estimate was similarly indirect. The radar did not produce a direct altitude readout. Instead, the conclusion that the object exceeded 60,000 feet depended upon assumptions about the geometry of the radar’s high-beam coverage and where within that beam the target lay.[Project 1947]project1947.comUAS files in the Australian Government record system2016 1Project 1947“UNUSUAL AERIAL SIGHTINGS”…
How the Speed and Height Figures Were Derived
The impressive numerical values often quoted in later UFO literature come from straightforward geometry rather than from a dedicated tracking computer.
For the speed estimate, the operator:
- estimated that the target crossed approximately 15,000 yards;
- timed that movement at ten seconds;
- converted the resulting ground speed into miles per hour.
Likewise, the altitude estimate rested on the characteristics of the AA No. 4 Mk. 6 radar. The report reasoned that because the target remained on the radar’s high beam at long range, it must have been above roughly 60,000 feet. That was an inference based on beam geometry rather than an independently measured altitude.[Project 1947]project1947.comkb uasgovProject 1947PROJECT 1947: “UNUSUAL AERIAL SIGHTINGS” A SEARCH THROUGH THE AUSTRALIAN GOVERNMENT’S RECORDS SYSTEMS…
Neither calculation was inherently unreasonable for an experienced radar operator. However, both depended upon assumptions that modern researchers cannot independently check because the underlying technical records have not survived.
Radar Effects That Can Mimic Very Fast Targets
A radar return is not automatically equivalent to a solid object travelling exactly as the display appears to show. Radar operators, particularly during the 1950s, were familiar with a variety of effects capable of producing unusual tracks.
Possible mechanisms include:
- Anomalous propagation. Unusual atmospheric layers can bend radar beams, causing reflections from unexpected locations or producing targets that appear to move irregularly.
- Ground or structural reflections. Buildings, terrain and other fixed objects can generate misleading echoes under particular conditions.
- Intermittent returns. If a target appears briefly, disappears and reappears, an operator may naturally connect separate echoes into a continuous path that exaggerates apparent speed.
- Beam geometry. Radar measures range and bearing rather than a complete three-dimensional trajectory. Estimating altitude and true velocity requires assumptions about where the target sits within the beam.
None of these possibilities proves that the Woomera target was spurious. Equally, none can be ruled out because the original technical evidence needed to reconstruct the radar conditions is no longer available. The surviving witness statement alone cannot distinguish between a genuine high-speed object and an unusual radar phenomenon.[Project 1947]project1947.comProject 1947PROJECT 1947: The Outspan Magazine - January 1, 1954 - Are We Being Watched?…
Why the Missing Records Matter
The greatest limitation on assessing the 3,600 mph claim is not the witness but the incomplete archive.
Researchers have identified several important items that are absent from the surviving file:
- the radar diagram referred to in Trotter’s statement;
- any radar photographs or film;
- calibration records for the radar set;
- detailed tracking logs;
- engineering data confirming the radar’s operating state during the observation;
- documentation allowing independent reconstruction of the calculated track.
Keith Basterfield noted that the report explicitly refers to a diagram on the “next page”, but that diagram was not present in the archival file examined. Without it, later investigators cannot verify exactly how the track was plotted or how the 15,000-yard measurement was determined.[Project 1947]project1947.comkbsaufo05 1Project 1947PROJECT 1947: Keith Basterfield - SOUTH AUSTRALIAN UFO REPORTS LISTING - Part OneMay 15, 2005…
This absence is especially important because radar interpretation depends heavily on context. Modern analysts would normally want to compare the unknown return with known aircraft tracks, weather conditions, equipment performance and other simultaneous observations. Those supporting records either have not survived or have not been located in publicly available archives.
How Historians Assess the Radar Claim Today
Most careful historians neither dismiss the radar report nor accept the famous speed figure uncritically.
Several aspects strengthen the report:
- it was written immediately after the event rather than decades later;
- the operator was trained to use military radar equipment;
- another serviceman was said to have witnessed the radar return;
- the report formed part of official weapons-range documentation rather than popular press speculation.[Project 1947]project1947.comkb uasgovProject 1947PROJECT 1947: “UNUSUAL AERIAL SIGHTINGS” A SEARCH THROUGH THE AUSTRALIAN GOVERNMENT’S RECORDS SYSTEMS…
At the same time, important limitations remain:
- the reported speed was calculated rather than directly measured;
- the altitude estimate depended on assumptions about beam geometry;
- the original plotting material is missing;
- no surviving technical evidence independently confirms the calculation;
- the available records do not allow modern analysts to recreate the radar track.
These competing factors explain why the case continues to attract attention. The documentation is stronger than many UFO reports because it originated within a military testing environment, yet it falls short of the evidential standard needed to confirm that radar tracked an object moving at 3,600 mph.
What the Radar Track Really Tells Us
The lasting significance of the Woomera radar report is not that it proves an extraordinary craft crossed South Australia at hypersonic speed. Rather, it shows that trained personnel operating sophisticated equipment encountered an unidentified radar return they considered unusual enough to document formally.
The famous figure of 3,600 mph should therefore be understood as an historical calculation made by the original operator under the conditions of the day. Because the supporting radar plot, calibration information and detailed tracking records are missing, that calculation cannot now be independently validated or falsified. Within the broader Woomera radar cases and the missing evidence, this uncertainty is precisely what keeps the incident unresolved: the surviving documents preserve the claim, but not enough of the technical record to determine how accurate it was.[Project 1947]project1947.comkb uasgovProject 1947PROJECT 1947: “UNUSUAL AERIAL SIGHTINGS” A SEARCH THROUGH THE AUSTRALIAN GOVERNMENT’S RECORDS SYSTEMS…
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Endnotes
1.
Source: project1947.com
Link:https://project1947.com/kbcat/kbwoomera.htm
Source snippet
Project 1947PROJECT 1947: Keith Basterfield - LISTING OF REPORTS FROM WOOMERA, SOUTH AUSTRALIA...
2.
Source: project1947.com
Title: kb uasgov
Link:https://www.project1947.com/kbcat/kb_uasgov.htm
Source snippet
Project 1947PROJECT 1947: “UNUSUAL AERIAL SIGHTINGS” A SEARCH THROUGH THE AUSTRALIAN GOVERNMENT’S RECORDS SYSTEMS...
3.
Source: project1947.com
Title: UAS files in the Australian Government record system2016 1
Link:https://project1947.com/kbcat/UAS_files_in_the_Australian%20_Government_record_system2016-1.pdf
Source snippet
Project 1947“UNUSUAL AERIAL SIGHTINGS”...
4.
Source: project1947.com
Link:https://www.project1947.com/fig/outspan54.htm
Source snippet
Project 1947PROJECT 1947: The Outspan Magazine - January 1, 1954 - Are We Being Watched?...
Published: January 1, 1954
5.
Source: project1947.com
Title: kbsaufo05 1
Link:https://www.project1947.com/kbcat/kbsaufo05-1.htm
Source snippet
Project 1947PROJECT 1947: Keith Basterfield - SOUTH AUSTRALIAN UFO REPORTS LISTING - Part OneMay 15, 2005...
Published: May 15, 2005
7.
Source: project1947.com
Link:https://www.project1947.com/forum/bcoz1.htm
Source snippet
Harry Turner was advocating attempts to secure more rada...
8.
Source: project1947.com
Title: sea fury 1954
Link:https://www.project1947.com/kbcat/sea_fury_1954.htm
Source snippet
PROJECT 1947: THE ‘SEA FURY’ RADAR INCIDENT REVISITEDTHE ‘SEA FURY’ RADAR INCIDENT REVISITED By An Adelaide UFO Researcher © 2017 * * * S...
Additional References
9.
Source: youtube.com
Title: Discovering Woomera: The Hidden History of Rocket Testing and Cold War Secrets
Link:https://www.youtube.com/watch?v=72YtvkPRxMo
Source snippet
An excellent video to accompany this analysis is Discovering Woomera: The Hidden History of Rocket Testing and Cold War Secrets, which ex...
10.
Source: exploroz.com
Title: woomera and maralinga ufo sightings 1952 1960
Link:https://www.exploroz.com/forum/141257/woomera-and-maralinga-ufo-sightings
Source snippet
3600 Miles per hour (5794 kph) is quite speedy, far faster than any aircraft of the day. Also much faster than a hawk.;) A...
11.
Source: ufos-scientificresearch.blogspot.com
Title: Unidentified Anomalous Phenomena
Link:https://ufos-scientificresearch.blogspot.com/2013/03/woomera-test-range-and-uap-file.html
Source snippet
scientific research: Woomera test range and UAP - a file digitised for viewingMarch 21, 2013 — In a section on the file headed "Deduction...
Published: March 21, 2013
12.
Source: centroufologiconazionale.eu
Title: il caso woomera 1954
Link:https://www.centroufologiconazionale.eu/il-caso-woomera-1954/
Source snippet
Il Caso Woomera (1954) - CENTRO UFOLOGICO NAZIONALEMarch 17, 2026 — L’Evidenza Strumentale: 3600 Miglia Orarie sul Radar Il primo pilastr...
Published: March 17, 2026
13.
Source: youtube.com
Link:https://www.youtube.com/watch?v=pSZUBulON6I
Source snippet
Oz Encounters: UFO's In Australia (1997) VHS Capture...
14.
Source: youtube.com
Title: Schoolyard [witnesses]({{ ‘witnesses-b8ac9c/’ | relative_url }}) in mass UFO sighting demand answers | Australian Story
Link:https://www.youtube.com/watch?v=IhKyQkhOfoM
Source snippet
The UFO Phenomenon | Full Documentary 2021 | 7NEWS Spotlight...
15.
Source: youtube.com
Link:https://www.youtube.com/watch?v=kjagAVNX9H0
Source snippet
UFO & UAP 'Need to Know' News Documentary with Coulthart & Zabel | 7NEWS Spotlight...
16.
Source: cia.gov
Link:https://www.cia.gov/readingroom/document/cia-rdp78-03153a001900080003-3
Source snippet
CIA FOIA (foia.cia.gov)January 28, 1954 — COMPLETION OF APD PROJECT #82, RADAR DETECTION TESTS, PERSONNEL BALLOON. Document Type: CREST...
Published: January 28, 1954
17.
Source: youtube.com
Link:https://www.youtube.com/watch?v=ZqSHlmpBbIY
Source snippet
Discovering Woomera: The Hidden History of Rocket Testing and Cold War Secrets...