I think it's the same case reported in Flying Saucers From Outer
Space, pp. 189-191. (See below)
(Fran Ridge: Project Blue Book documents confirm this case and that
Colonel "Low", the F-84 pilot, is actually Colonel Blakeslee. Other
than the name, Keyhoe's account is, again, incredibly accurate, and
indicative of the reliability of his written word, especially when it
came to actual intelligence reports.)
Update by Dan Wilson:
Check The Flying Saucer Conspiracy, page 46, Keyhoe
mentions that he has by an Air Force error mistaken Colonel Curtiss Low
for Colonel D. J. Blakeslee in the December 29, 1952, rotating lights
Before Riordan came that evening, I
looked over the two sightings Al had cleared. The first Intelligence
report covered the rotating lights report which Riordan had mentioned.
Though the saucer had been sighted by several air crews and tracked by
ground radar, the detailed report was made by Colonel Curtis Low,
commander of the fighter escort wing in Japan. (As Colonel Low was
mentioned in a news dispatch which briefly described the incident, I am
using his right name.)
The Intelligence officer who interrogated Colonel Low had been
seriously impressed by the wing commander's account.
"The pilot reporting," he said, "has held responsible command
assignments for some time. The accuracy of his statements was
consistent despite repetitive interrogation. His sequence of times,
locations, and descriptions did not vary at any time. He is stable and
thoroughly reliable. There were no activities of a meteorological
nature or any inversion which could account for these sightings . . .
This is a graphic description of an object falling definitely into the
family of UFO."
The action began in the early evening of December 29, 1952. At about
7:30 P.M. an Air Force radar base in northern Japan received a call
from a B-26 crew.
"We've just sighted a UFO. It looks like a cluster of lights—red,
white, and green."
Moments later the Air Force radar men picked up the UFO. But because of
the B-26's low speed, no interception could be made. At 7:45 an F-94
pilot radioed in, reporting the same type of device. The call was
overheard by Colonel Low, who was flying his F-84 jet fighter at 27,000
Three minutes later the wing commander sighted the strange machine,
easily identified by its red, white, and green lights. He called Ground
Control and was asked to try an interception.
As he climbed, Colonel Low switched off his lights. The object's lights
did not change—proof that it was no canopy reflection. Keeping his own
lights off to avoid detection, Low climbed to 35,000 feet. When he got
closer, he saw that the saucer's lights were revolving in a
counterclockwise direction—a steady rotation between eight and 12 times
Beside the shifting colors, Low could see three fixed shafts of white
light shining outward. Apparently one part of the machine was rotating,
but the change of colors was puzzling. At times the saucer was one
solid color, white, green, or red. In between, the wing commander saw
brief combinations—red-white, red-green, and green-white. But the three
white beams remained constant.
After watching the device for a moment longer, Colonel Low opened his
F-84 to full power. Racing in at over 500 miles an hour, he tried to
close the gap. Apparently his unlighted plane was not seen for a second
or two. Then the saucer increased its speed. Gradually pulling away, it
disappeared in 30 seconds.
Five minutes later, circling at 35,000 feet, the wing commander saw the
machine again. As before, it was at his level, but now moving parallel
with the F-84. This time, as a test, Colonel Low left his lights on
when he tried to close in. Immediately turning west, the strange craft
speeded up, so swiftly that it vanished in five seconds.
Source: Donald Keyhoe, "Flying Saucers From Outer Space", pages