Posted on 06/11/2019 4:47:06 AM PDT by RoosterRedux
For context, and to show some of the complexity, I'm copying a couple of paragraphs that discuss data processing from the Wikipedia article on radar. One of the most significant sentences in this is "Reflections from terrain, water, and weather produce signals much larger than aircraft and missiles."
From Wikipedia:
Pulse-Doppler signal processing includes frequency filtering in the detection process. The space between each transmit pulse is divided into range cells or range gates. Each cell is filtered independently much like the process used by a spectrum analyzer to produce the display showing different frequencies. Each different distance produces a different spectrum. These spectra are used to perform the detection process. This is required to achieve acceptable performance in hostile environments involving weather, terrain, and electronic countermeasures.
The primary purpose is to measure both the amplitude and frequency of the aggregate reflected signal from multiple distances. This is used with weather radar to measure radial wind velocity and precipitation rate in each different volume of air. This is linked with computing systems to produce a real-time electronic weather map. Aircraft safety depends upon continuous access to accurate weather radar information that is used to prevent injuries and accidents. Weather radar uses a low PRF. Coherency requirements are not as strict as those for military systems because individual signals ordinarily do not need to be separated. Less sophisticated filtering is required, and range ambiguity processing is not normally needed with weather radar in comparison with military radar intended to track air vehicles.
The alternate purpose is "look-down/shoot-down" capability required to improve military air combat survivability. Pulse-Doppler is also used for ground based surveillance radar required to defend personnel and vehicles.[38][39] Pulse-Doppler signal processing increases the maximum detection distance using less radiation in close proximity to aircraft pilots, shipboard personnel, infantry, and artillery. Reflections from terrain, water, and weather produce signals much larger than aircraft and missiles, which allows fast moving vehicles to hide using nap-of-the-earth flying techniques and stealth technology to avoid detection until an attack vehicle is too close to destroy. Pulse-Doppler signal processing incorporates more sophisticated electronic filtering that safely eliminates this kind of weakness. This requires the use of medium pulse-repetition frequency with phase coherent hardware that has a large dynamic range. Military applications require medium PRF which prevents range from being determined directly, and range ambiguity resolution processing is required to identify the true range of all reflected signals. Radial movement is usually linked with Doppler frequency to produce a lock signal that cannot be produced by radar jamming signals. Pulse-Doppler signal processing also produces audible signals that can be used for threat identification.[38]
Reduction of interference effects[edit]
Signal processing is employed in radar systems to reduce the radar interference effects. Signal processing techniques include moving target indication, Pulse-Doppler signal processing, moving target detection processors, correlation with secondary surveillance radar targets, space-time adaptive processing, and track-before-detect. Constant false alarm rate and digital terrain model processing are also used in clutter environments.
Plot and track extraction[edit]
Main article: Track algorithm
A Track algorithm is a radar performance enhancement strategy. Tracking algorithms provide the ability to predict future position of multiple moving objects based on the history of the individual positions being reported by sensor systems.
Historical information is accumulated and used to predict future position for use with air traffic control, threat estimation, combat system doctrine, gun aiming, and missile guidance. Position data is accumulated by radar sensors over the span of a few minutes.
There are four common track algorithms.[40]
Nearest neighbour algorithm
Probabilistic Data Association
Multiple Hypothesis Tracking
Interactive Multiple Model (IMM)
Radar video returns from aircraft can be subjected to a plot extraction process whereby spurious and interfering signals are discarded. A sequence of target returns can be monitored through a device known as a plot extractor.
The non-relevant real time returns can be removed from the displayed information and a single plot displayed. In some radar systems, or alternatively in the command and control system to which the radar is connected, a radar tracker is used to associate the sequence of plots belonging to individual targets and estimate the targets' headings and speeds. End Wikipedia.
At no point in history has any government ever wanted its people to be defenseless for any good reason ~ nully's son
Nut-job Conspiracy Theory Ping!
To get onto The Nut-job Conspiracy Theory Ping List you must threaten to report me to the Mods if I don't add you to the list...
LOL! You consistently come up with great graphics.
The real story here (so far) is not the UFO's. The story is what is the objective of those pushing it (the story).
This story is being generated by the Navy, some Navy pilots and radar operators, the DOD (Elizondo, Mellon), and Lockheed. Those parties, seemingly in concert, have produced and/or corroborated the story line and then fed that story line to Tom DeLonge and the History Channel, who in turn produced a documentary on it entitled "Unidentified."
So the question goes to motive.
First, let's do away with a scenario in which in the Navy and DOD are being used (wittingly or unwittingly) to provide an air of respectability/credibility to a story that has been concocted by the non-governmental parties (retired pilots and former guvvie agents) for the sole purpose of making a profit.
Making money from such a story is always a tempting motive. The question here is "would the Navy and DOD permit themselves to be so used without having an overriding ulterior motive?" Doubtful.
The next possibly motive "question" would be, if the Navy and DOD have either signed off on this story moving forward or are in some way a part of it, what would be their possibly motive?
Just on the surface, their possible motives might be:
(1) Get this story out there as part of their new policy of encouraging pilots and others to report UFO's. In other words, they have no interest in where this leads (they don't know or care). They are just showing their pilots that it is OK to report such stories...there will be no negative repercussions from them. And if the pilots make some money off their stories/mysteries, no problemo.
(2)The Navy and DOD are letting this story get out there as a way of telling our enemies (obliquely of course) that we are developing weapons way beyond those envisioned by Russia or China. So take that Russian and Chinese hypersonic missile proponents.
(3)The Navy and DOD are actually telling the U.S. public that they have detected enemy aircraft capable of penetrating our airspace and eluding our aircraft and defenses. ER, NO. SCRATCH THAT.
(4) The Navy and DOD are disclosing--finally--that they have made contact with aliens and their UFO's. Doubtful, but who knows.
BTW, it isn't about UFO's. The real story is what is the motive of the Navy and the DOD by putting this story out there.
There are Naval Aviators (more than 1) that have had Visual conformation of the “TicTac” encounter off of the leftist coast during which to CAC on the USS Princeton called 2 Super Hornets from the USS Nimitz off of Training to a “Real World Contact” verification. Both Lead and Wingman confirmed Visual at Sea Level and at 28,000’ - 30,000’ as the Contact varied between those FL’s with the Contact jumping from one to the other, at incredible speed.
Later on the CAC on The USS Princeton calculated the time for the “TicTac” from 30,000’ to Sea Level was IIRC .78 Seconds then reversed the Maneuver.
The TicTac also submerged and USS Princeton Sonar track was handed off to the USS Louisville took over Track only to find the TicTac Track doing 75 knots.
BTW- a Helo showed up Post Incident and several Unknown Officers went to the CIC and collected copies of All the DATA from that day and got back on the Helo and departed. When the CAC went back to look at the DATA and the entire Day’s DATA was gone. Go figure they had been MIBed...
Personally I don’t care if You believe any of this or not. I do. I Trust Our Aviators and Sailors. Why would they make this up ? I wont buy that it’s a hoax or joke- too many People and Assets involved. There’s no way that a Carrier Battle Group with all it’s assets including the USS Princeton, the USS Louisville, All the Crew and multiple Aircraft involved in this just fir the Halibut...
The Navy wants the Space Force under their command?
So the aliens have mastered warp drive but not stealth?
I hadn’t thought about that. Very interesting idea.
Cui bono? is always a valid question.
Thanks! I try.
Only the Navy has experience with long missions, isolated crews and non-existent supply lines.
The Air Force would be good for quick near Earth missions, they have a LOT of experience with missions lasting a few hours, and quick return to base for dinner and refueling.
Any self-sufficient mission lasting months? Not so much...
I'd agree with that. Motive is important, especially when dealing with government folk.
You are correct. In the 80’s I installed Navy SPS 40 (air search) and SPS 10 ( surface search)radars for the Navy. They could be tuned for a few different missions. Weather being one, aircraft being another. I moved on to FAA radars after that. Pretty much the same. While installing one on San Nicholas Island off the coast of Calif. I got to track the last flight of the Blackbird. Awesome. Two sweeps, two contacts and gone!
The article I posted indicates that the pilots in the story NEVER got visual(s) on the UFO. Do you have conformation that there was visual contact?
Here's what Fravor said in the WaPo interview:
The news of its existence marks one of the most significant disclosures about government research into flying objects — and the so-far-unproven possibility of extraterrestrial aircraft — since Project Blue Book, a lengthy Air Force study of thousands of UFOs that was shut down in 1969. Project Blue Book failed to find “any technological developments or principles beyond the range of present-day scientific knowledge,” and no evidence of any “extraterrestrial vehicles,” according to the Air Force, though a small portion of the events it studied remain unexplained.The encounter Fravor described was analyzed by the recent Defense Department program, he said, but its most significant questions — the nature of the object and what it was doing — have also remained unanswered.
Fravor says he is certain about one thing: “It was a real object, it exists and I saw it,” he said in a phone interview on Monday, as he described the sighting, on Nov. 14, 2004.
Asked what he believes it was, 13 years later, he was unequivocal.
“Something not from the Earth,” he said.
Fravor was the commanding officer of the VFA-41 Black Aces, a U.S. Navy strike fighter squadron of F/A-18 Hornet fighter planes doing an exercise some 60 to 100 miles off the coast between San Diego and Ensenada, Mexico, in advance of a deployment to the Persian Gulf for the Iraq War, he said.
An order came in for him to suspend the exercise and do some “real-world tasking,” about 60 miles west of their location, Fravor said. He said he was told by the command that there were some unidentified flying objects descending from 80,000 feet to 20,000 feet and disappearing; he said officials told him they had been tracking a couple dozen of these objects for a few weeks.
When they arrived closer to the point, they saw the object, flying around a patch of white water in the ocean below.
“A white Tic Tac, about the same size as a Hornet, 40 feet long with no wings,” Fravor described. “Just hanging close to the water.”
The object created no rotor wash — the visible air turbulence left by the blades of a helicopter — he said, and began to mirror the pilots as they pursued it, before it vanished.
Yes, there were visual contacts by the guy nicknamed “Sex”. Separetly a second pilot also confirmed seeing the tic tack. She did her interview on the history channel. I believe the crew of the radar plane also picked it up visually, as mentioned in the interviews in the history channel.
4ltr
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>> “The real story is what is the motive of the Navy and the DOD by putting this story out there.” <<
Which meshes well with my comment.
Your link has been removed by the Men In Black.
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