A new and exciting computer
accessory appeared on the market just a
few years ago. It's
called an SDR, short for "Software Defined Radio
Basically, an SDR enables you to use your computer as a radio frequency
receiver, but its full range of capabilities goes far beyond that, and
for the amateur scientist community these things are nothing short of
revolutionary. SDRs are
available in a USB dongle configuration not much bigger than a flash
drive and costing less than $25. More advanced versions are available
the $100 and up range, but even the most inexpensive dongles, used in
conjunction with a computer, a
antenna, and some freely downloadable software, can provide you
with a piece of research equipment the likes of which could not have
been obtained by anyone at any price until now.
SDRs can tune across an amazingly wide
frequencies in a variety of reception modes, but even more amazing, the
software that enables the SDR to work its magic
can perform a mind-boggling array of audio and visual permutations to
help perform detailed analysis of the signal you
are tuned to - its relative strength, waveform characteristics, effects
adjacent frequencies and background noise, etc. You can listen with
speakers or earphones, just as you would a conventional radio, but the
radio frequency activity also appears on the computer monitor as an
graphical display of the spectrum. So, in a sense, an SDR can actually
"see" radio waves and to learn about things going on within
the luminiferous aether
like never before.
Clever experimentalists have come up with all sorts of ways to ustilize
SDRs that go beyond simply listening to radio broadcasts, and of
special interest to UFO research has been their use in such
things as observing airplane traffic, satellites, and even meteors.
These observations involve a technique known as "passive
" in which an observer
monitors the signals from ordinary radio or television stations
to detect the effects that fast moving high altitude objects can have on
those signals. For
example, when the ionized
trail of a falling meteor crosses the path of a terrestrially broadcast radio wave, a
sound called a "ping
" can be heard on the
receiving end. Falling
meteors and many other
atmospheric and ionospheric related phenomena can be studied in terms of
the characteristic audio and visual
they produce when using an SDR receiving system. (Here's more about how this works with
So what about UFOs? Why can't similar techniques be used to look for
activity? Of course, for a computerized UFO radar system to succeed it's
essential that our chosen targets exhibit some type of interaction with
either directly or indirectly, and we have plenty of evidence suggesting that they do:
Everyone familiar with the history of UFO reports since the mid-20th
century knows that radar sightings played a significant role in the
early development of both the public’s interest and the government’s
refudiating stance concerning the UFO situation. Ever since the days
of World War II, UFO radar sightings
have been made by highly
and often government sanctioned observers using some of
the most sophisticated electronic equipment ever designed. These radar sightings could not be
discounted as easily as random personal accounts which, though more
numerous, could always be explained away as mistakes arising from
confusion, illusion, and/or delusion on the part of ordinary citizens.
In addition, the UFO literature includes numerous reports about
sightings that occurred in conjunction with disruptions to ordinary
radio and TV programs. In fact, many types of electro-magnetic
effects have been attributed to UFOs over the years, so there is ample
reason to believe that a "true" UFO (i.e., an extra-terrestrial or extra-dimensional craft) could be detected
by looking for some unique characteristics of its impact on radio wave transmissions.
Let's take a look at the specifics of how such a detection system might
conventional radar system, the type used for tracking military and
commercial aircraft, consists of a dedicated transmitter which sends
out a highly directional pulsed radio frequency beam that is reflected
back towards a receiver when a plane flies within range of the
beam. These reflectied signals, usually referred to as echoes, can be
as "blips" on a monitoring screen and, with some very sophisticated
electronic wizardry, observers are able to measure the time shift
transmission of the radar beam and reception of its echo to determine
distance, velocity, and other factors pertaining to the
aircraft. In most installations the radar transmitter and
are located within the same facility, or at least in close proximity,
and often share the same antenna.
A passive radar system, however, does not employ its own
dedicated transmitter. Instead, it utilizes the ever present
from commercial radio and TV stations as its reference signal. It
turns out that digital television signals are very well suited for this
application so there is no shortage of potential "radar beams" to be
monitored. Don't worry though, we're not suggesting that you actually
watch the shows being broadcast, but simply a component of the raw
digital signal - namely the "pilot
signal," which is a specific frequency embedded within the
channel's broader transmission. (It's the spike towards the left edge
of this graphical image of a UHF TV channel 33
.) In addition to the SDR dongle mentioned above,
monitoring station would consist of a simple antenna plus the cable
and connectors to hook the antenna to the SDR, along with a computer
necessary software. All of this (assuming you already have a computer)
can be acquired for less than $50.
The ultra-simple system we're describing here has the advantage of
a few million
less than a conventional radar installation. It also has the advantage
of being able to observe activity from
different directions and at different distances
simultaneously. Most importantly, it places a powerful new
tool for studying UFOs within everyone's reach.
By simply letting the computer/SDR "radar system" run, and then
observing (and/or recording) the
incoming signals over a period of time, you will soon learn what is
"normal". Several factors will routinely impact or accompany the
monitored signals from day
to day, such as passing airplanes, as well as some fascinating
atmospheric effects, but what you will be searching for is
something completely different. Some anomalous signal trace that can
only be explained by a cause that fits the typically reported pattern
of UFO behavior
(extreme speed, sudden changes of direction, or a general disturbance
within the normal space-time-gravitational field.) With a little
computer savvy, some
experience, and yes, a lot of patience, we believe thaty anyone
seriously interested in UFO research
make some major scientific breakthroughs with this approach..
So, what we're proposing is that a global network of
using SDR enabled computers will monitor the airwaves for signs of
activity therein, while also being on the lookout for reports of visual
UFO sightings within the same geographical area. Our goal will be to
correlate these two types of observations and ultimately discover some
"signature" that a UFO can be expected to display on our home-brew
screens. This opens up all sorts of exciting possibilities, including
real time detection of UFO activity in a way that can alert others in
the area to put their eyes to the skies, and eventually to help unravel
some of the enduring mysteries surrounding UFOs.
ground-breaking work that will take some serious time and effort. We
believe this would make a great group
activity, a student project,
or perhaps the basis for an upcoming Nobel prize. It's just in the
preliminary stages at this point, but if you think you'd like to get
onboard with this new UFO detection system in any way please let us
know. We'll keep
you in the loop as things develop.
If you would like to learn more details or share your thoughts and
suggestions please send an email to: firstname.lastname@example.org
October 2018 - We've just learned that our preferred source for SDR
dongles is planning to release a new version specifically designed for
passive radar applications in the near future.
Stay tuned for more . . .
The images below are a series of screenshots taken during September 27/28,
2018 while monitoring pilot signals for UHF TV channel 31 from my location in central
Virginia. Each image covers about 1 hour of observing time. The entire
group spans about 16 hours
and shows an interesting variety of activity.
The horizontal bands
represent the actual television transmission signals being received
during the time frame. Note the variations that occurred over the
course of the day (from a little before midnight through
mid-afternoon). The numerous vertical and diagonal streaks represent
reflections from normal aircraft that
passed between the transmitters and receiver. The first image also
some heightened background noise activity (the bluish areas overlaying
horizontal TV signals) possibly caused by nearby storms.
last image contains a curious arcing parabolic formation that doesn't
look like anything I've seen before or since, after hundreds of hours
observing with this method.
Could it have been a UFO?
The first screenshot covers the time period
from just before 11 pm (23:00:00) until midnight (00:00:00) on
September 27, 2018. Note the date and time stamp indications
shown at 10 minute intervals along the bottom of the chart. Here we see
4 continuous horizontal bands which represent the pilot signals from several different UHF TV transmitters.
The vertical and diagonally curving streaks are caused by airplanes
crossing the paths of the TV signals and causing "out of phase"
reflections that show up slightly above and below the direct signal's frequency as the planes move into and away from the transmitted beam. Areas of heightened background noise are seen as hazy bluish splotches, possibly resulting from thunderstorm activity in the area.
In this second screenshot,
taken a few hours later (about 5:00 - 6:00 am), we see less airplane
traffic, less background noise, and also notice that the lower TV
signal has diminished in received strength. A peculiar "burst" of green pixels appeared at about 05:38 slightly above the top TV signal - possibly a meteor?
After 6:00 am the fourth TV signal
had all but disappeared completely before making a strong comeback just
before 07:00. Airplane traffic is steadily increasing, and two more
atypical "bursts" appeared at about 6:12 and 6:30. Contrary to common
perceptions, meteor activity is generally higher in the early morning
hours, so these sudden and short-lived bursts could well be meteor
echoes, but they might just as well be from something less common.
Corroborating sighting reports could help resolve the question.
the last screenshot of this series, covering the afternoon period from
about 2:25 - 3:35 pm, we see a constant flurry of airplane traffic and
that the lower UHF TV signal has dropped out of range. The anomalous
parabolic (or "backwards N") formation that begins just after 3:00 pm
and hovers for about 10 minutes is unlike anything I've observed before
or since. What could it have been?