Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Monday, August 9, 2021

TTP - Thousand Talents Scam - Qiming

21-12-23 How China's Biggest Spies were CAUGHT in 2021 - serpentza > .
23-8-27 [Qiming is new name for TTP intellectual poaching plan] - Update > .
23-4-16 R-U Hybrid Warfare: P00paganda, cyber, hybrid methods - Perun > .
22-11-19 G20 '22 Biden-Xi meeting = "start of a new Cold War" - Times > .
22-9-21 Western scholars debate decoupling; Xi plots tech dominance - Digging > .
22-3-24 Chinese Influence Over Australian Universities | JoAnd > . full > .

TTP - Thousand Talents Scam ..

In response to widespread Western negative reaction and pushback, Xina has attempted to duck beneath the radar by relabeling its scheme to poach intellectuals and steal intellectual property. The current iteration of the program is called Qiming, administered by the Ministry of Industry and Information Technology.

Qiming Venture Partners (啟明創投; Qǐmíng chuàngtóu) is a Xina based Venture capital firm. It primarily invests in Technology, Internet and Healthcare related companies across Xina. It is headquartered in Shanghai with offices in Beijing, Suzhou, Shenzhen and Hong Kong. It mainly focuses on investments in China. Investors include Princeton University, Duke University and the Robert Wood Johnson Foundation. In 2017, it set up its American branch, Qiming Venture Partners (USA). The branch is headquartered in Seattle, Washington with offices in Cambridge, Massachusetts and San Francisco, California.

The Thousand Talents Plan or Thousand Talents Program (TTP), or Overseas High-Level Talent Recruitment Programs was established in 2008 by the central government of China to recognize and recruit leading international experts in scientific research, innovation, and entrepreneurship. Both the United States and Canada have warned that China intends to use scientists who are involved with this plan to gain access to new technology for economic and military advantage.


The success of the program in recruiting U.S.-trained scientists back to China has been viewed with concern from the U.S., with a June 2018 report from the National Intelligence Council declaring an underlying motivation of the program to be “to facilitate the legal and illicit transfer of US technology, intellectual property and know-how” to China

In January 2020, the Federal Bureau of Investigation arrested Charles M. Lieber, the chair of Harvard University's Department of Chemistry and Chemical Biology, for lying about his ties to the program

In May 2020, the FBI arrested a former researcher at the Cleveland Clinic for failing to disclose ties to the Thousand Talents Program. 

In June 2020, it was reported that the National Institutes of Health had investigations into the behavior of 189 scientists. In November 2020, Song Guo Zheng, a TTP participant, pled guilty to making false claims to the FBI about his ties to the Chinese government during his employment at Ohio State University.

In November 2019, the US Senate Permanent Subcommittee on Investigations and Committee on Homeland Security and Governmental Affairs held an open hearing on the China's Talent Recruitment Plans, including the TTP, and called the programs a threat to national security. The report from the hearing cited TTP contracts as violating research values, TTP members willfully failing to disclose their membership to their home institutions, and cited numerous cases against TTP members for theft of intellectual property and fraud. One TTP member stole proprietary defense information on U.S. military jet engines. The report indicated that "TTP targets U.S.-based researchers and scientists, regardless of ethnicity or citizenship, who focus on or have access to cutting-edge research and technology."

In August 2020Canadian Security Intelligence Service warned both Canadian universities and Canadian research institutions of the TTP, saying that it recruited researchers and scientists around the world to persuade them to share their research and technology — either willingly or by coercion.

The program grew out of the "Talent Superpower Strategy" of the 17th National Congress of the Chinese Communist Party in 2007. The Central Committee of the Chinese Communist Party and State Council of the People's Republic of China elevated the program in 2010 to become the top-level award given through China's National Talent Development Plan to strengthen innovation and international competitiveness within China. In 2019, the program was re-branded as the "National High-end Foreign Experts Recruitment Plan." The United Front Work Department's Western Returned Scholars Association is the official representative body for program participants.

1000 Talent Plan professorship is the highest academic honor awarded by the State Council, analogous to the top-level award given by the Ministry of Education. The program includes two mechanisms: resources for permanent recruitment into Chinese academia, and resources for short-term appointments that typically target international experts who have full-time employment at a leading international university or research laboratory.

The program has three categories:
  • Innovative 1000 Talents plan (Long term / Short term) – for Chinese scholars below 55 years of age
  • Foreign 1000 Talents plan (Long term / Short term) – for foreigners only below 55 years of age
  • Young scholar 1000 Talents plan or Overseas Young Talents Project of China — for those below 40 years of age
The program has been praised for recruiting top international talent to China, but also criticized for being ineffective at retaining the talent.

Conflict of interest and fraud concerns: Although the program has successfully attracted top international talent to China, its efficacy in retaining these talented individuals has been questioned, with many of the most talented scientists willing to spend short periods in China but unwilling to abandon their tenured positions at major Western universities. Additionally, some Thousand Talents Plan Professors have reported fraud in the program including misappropriated grant funding, poor accommodations, and violations of research ethicsDismissals due to undisclosed connections to the TTP have taken place. Individuals who receive either of China's two top academic awards, the Thousand Talents Professorship and the Changjiang (Yangtze River) Scholar award, have become targets for recruitment by China's wealthiest universities so frequently that the Ministry of Education issued notices in both 2013 and 2017 discouraging Chinese universities from recruiting away top talent from one another [poaching].

Monday, July 26, 2021

CCP Crackdown

21-7-25 Why China Is Crashing Its Own Stock Market - Outlook > .
24-2-19 Book of Lord Shang: Ancient Path to Power; Ongoing Suffering - Digging > .
23-10-25 Understanding NoXious World (Dis)Order - Kotkin | Hoover > .
23-10-15 [NoXious Suppression of Autocratic Regime's Fodder] - serpentza > .
23-9-25 Xi's Transforming Xina [for the worse] - Xina's Changing Trajectory - Dig > .
23-9-16 "Belt & Road to Death" - [XiXiP targeted corrupt governments] - Obs > .
23-8-2 Xi's Anti-Corruption Purge of PLA Rocket Force | PLA structure - Digging > .
23-4-16 Logan Wright Grasping Shadows X-Ec 1 - Update > . 2 > .
23-1-23 Xina’s Two-Year Tech Crackdown Winds Up | WSJ > .
23-1-20 Xi's Biggest Errors - Kevin Rudd | Update > .
22-11-27 Dragon's Claw: Xina's Next 10 Years - Kamome > . skip > .
22-11-1 "Overreach" | Susan Shirk, Kevin Rudd | Asia Society > .
22-10-27 Xina is "Pretty Much Screwed" - laowhy86 > .
22-10-25 Xina's Q3 details - Update > .
22-10-18 Xi absolute power through Party Constitution and XXP princelings - Lei > .
22-8-25 Xi vs Li: Xina’s dual-leadership after the 20th Party Congress? - Lei > .
22-8-3 Housing Crisis Pulls Down China’s Huge Steel Industry | Pelosi | Update > .
22-3-28 China's Economic Rise—End of the Road - cfr > .

CCP Amplifies Control-Freakery 
CCP Crackdown on Business ..
CCP Expansionism ..

Commenter: [dubious] "As a Chinese, I know the main motivation of this process of adjustment is to meet the challenges of the USA decoupling, which makes the government realize that many industry sectors are already in danger. That key strategy is to reduce the importance of real estate and financial assets, Internet and virtual economy, in order to improve the weakening manufactures and consumer sectors. It has been on the top list for years, and the US challenges just happen to accelerate its implementation."

China says crackdown on business to go on for years:

The Chinese government has unveiled a five-year plan outlining [even] tighter regulation of much of its economy. It says new rules will be introduced covering areas including national security, technology and monopolies in the world's second largest economy. The plan comes soon after Beijing started targeting the technology and education industries.

The 10-point plan, which runs to the end of 2025, was released jointly late on 21-8-11 by China's State Council and the Communist Party's Central Committee. It said laws will be strengthened for "important fields" such as science and technological innovation, culture and education. The plan also said the Chinese government aims to tackle monopolies and "foreign-related rule of law".

Regulations relating to China's digital economy, including "internet finance, artificial intelligence, big data, cloud computing etc." will also be reviewed. The announcement raised fresh concerns that Beijing's crackdown on technology and private education companies is set to continue and expand in years to come. Shares in many Chinese companies listed in the US, Hong Kong and mainland China have fallen sharply this year as investors' concerns grow over the crackdown.

21-12-28 From economic miracle to mirage – will China’s GDP ever overtake the US?: Analysis: issues of governance, rising debt, COVID and property market turmoil will delay Beijing’s quest to become the global economy’s No 1.

Wednesday, September 23, 2020

Fighter development


Fighter development

The Evolution of the Fighter in World War II: The World War II period saw the development of the fighter aircraft from the biplane through to the introduction of the first jet fighter aircraft. Aircraft featured in this volume include the Mustang, Spitfire, Hurricane, Bf 109, Bf 110, P-40, P-38 and A6M Zero.

Clash of Wings - Discovery Channel - playlist
https://www.youtube.com/playlist?list=PLCD409097FB2DA594

https://en.wikipedia.org/wiki/Clash_of_Wings .


Great Machines 1930s - Supermarine Spitfire > .

Thursday, February 13, 2020

Vlad the Despoiler


[edited for emphasis] Putin’s Long War Against American Science: A decade of health DISinformation promoted by President Vladimir Putin of Russia has sown wide confusion, hurt major institutions and encouraged the spread of deadly illnesses.

"On Feb. 3, soon after the World Health Organization declared the coronavirus to be a global health emergency, an obscure Twitter account in Moscow began retweeting an American blog. It said the pathogen was a germ weapon designed to incapacitate and kill. The headline called the evidence “irrefutable” even though top scientists had already debunked that claim and declared the novel virus to be natural.

As the pandemic has swept the globe, it has been accompanied by a dangerous surge of false information — an “infodemic,” according to the World Health Organization. Analysts say that President Vladimir V. Putin of Russia has played a principal role in the spread of false information as part of his wider effort to discredit the West and destroy his enemies from within. [DISinformation trolls are running rampant on a recent Washington Post video about hydroxychloroquine and COVID-19. Hell only know how many poorly-educated, anti-authority authoritarian [sic] Americans are credulous enough to believe the LIES.]

The House, the Senate and the nation’s intelligence agencies have typically focused on election meddling in their examinations of Putin’s long campaign. But the repercussions are wider. ... Putin has spread DISinformation on issues of personal health for more than a decade.

His agents have repeatedly planted and spread the idea conspiracy theory that viral epidemics — including flu outbreaks, Ebola and now the coronavirus — were sown by American scientists. The DISinformers have also sought to undermine faith in the safety of vaccines [resulting in the deaths of children], a triumph of public health [destruction] that Putin himself promotes at home.

Moscow’s aim, experts say, is to portray American officials as downplaying the health alarms and thus posing serious threats to public safety."
...
"The Russian president has waged his long campaign by means of open media, secretive trolls and shadowy blogs that regularly cast American health officials as patronizing frauds. Of late, new stealth and sophistication have made his handiwork harder to see, track and fight.

Even so, the State Department recently accused Russia of using thousands of social media accounts to spread coronavirus DISinformation — including a conspiracy theory that the United States engineered the deadly pandemic."
...
"Because public interest in wellness and longevity runs high, health DISinformation can have a disproportionally large social impact. Experts fear that it will foster public cynicism that erodes Washington’s influence as well as the core democratic value of relying on demonstrable facts as a basis for decision-making."

Article's other links 
"Seeding lack of trust in government institutions,” Peter Pomerantsev, author of “Nothing Is True and Everything Is Possible,” a 2014 book on Kremlin disinformation.

Sandra C. Quinn, a professor of public health at the University of Maryland has followed Mr. Putin’s vaccine scares for more than a half-decade.

P vs NP


Polynomial Time Algorithms, Exponential-Time Complexity, 

Thursday, January 23, 2020

Future Battle? - Seabed Mining

.
24-1-9 Deep Sea Mining: do we really need it? - Our Metallic Earth > .
Mining the deep sea: the true cost to the planet | Economist > .Lanthanides - REEs - Omnia per Scientiam >> .
Energy Challenges - Omnia per Scientiam >> .

To meet the world's growing demand for batteries, private companies have turned their attention to mining the ocean floor. But this practice could come at a greater cost to the planet than it's worth.

Terrestrial mining doesn’t have a perfect record, it comes with a long list of environmental and human rights abuses, including pollution and child labor. All this to dig up raw materials like nickel, manganese, and cobalt that are necessary for our lithium-ion batteries.

Some strategies for a carbon-free future depend on making these batteries in much larger numbers and using them as a power source for electric cars or a storage method for electricity generated by renewables. 

But another source of these materials could lie at the bottom of the ocean. Potato-sized lumps called polymetallic nodules are rich in manganese, copper, cobalt, nickel, and other precious metals; and they are found in abundance in some areas like the Clarion-Clipperton Zone that stretches from Hawaii to Mexico.

History’s Largest Mining Operation Is About to Begin
https://www.theatlantic.com/magazine/... .
"Regulations for ocean mining have never been formally established. The United Nations has given that task to an obscure organization known as the International Seabed Authority, which is housed in a pair of drab gray office buildings at the edge of Kingston Harbour, in Jamaica. Unlike most UN bodies, the ISA receives little oversight."

Treasure and Turmoil in the Deep Sea
https://www.nytimes.com/2020/08/14/op... .
"As a result of the mining, animals already living near their physiological limits would be eating mouthfuls of poisonous dirt for breakfast, respiring through clogged gills and squinting through a muddy haze to communicate."

Seabed mining is coming — bringing mineral riches and fears of epic extinctions
https://www.nature.com/articles/d4158... .
"The sea floor there boasts one of the world’s largest untapped collections of rare-earth elements. Some 4,000 metres below the ocean surface, the abyssal ooze of the CCZ holds trillions of polymetallic nodules — potato-sized deposits loaded with copper, nickel, manganese and other precious ores."

21-7-1 First seabed mines may be step closer to reality

The tiny Pacific nation of Nauru has created shockwaves by demanding that the rules for deep sea mining are agreed in the next two years. Environmental groups warn that [regulations concerning seabed mining] will lead to a destructive rush on the mineral-rich seabed "nodules" that are sought by the mining companies. But United Nations officials overseeing deep sea mining say no venture underwater can start for years.

[Partnered with DeepGreen], Nauru, an island state in the Pacific Ocean, has called on the International Seabed Authority - a UN body that oversees the ocean floor - to speed up the regulations that will govern deep sea mining. Nauru has activated a seemingly obscure sub-clause in the UN Convention on the Law of the Sea that allows countries to pull a 'two-year trigger' if they feel negotiations are going too slowly. Nauru, which is partnered with a mining company, DeepGreen, argues that it has "a duty to the international community" to make this move to help achieve "regulatory certainty". It says that it stands to lose most from climate change so it wants to encourage access to the small rocks known as nodules that lie on the sea bed.

[The nodules] are rich in cobalt and other valuable metals that could be useful for batteries and renewable energy systems in the transition away from fossil fuels. The nodules, a habitat for countless forms of life, are estimated to have formed over several million years so any recovery from mining will be incredibly slow. Scientists say they're far from gaining a complete understanding of the ecosystems in the abyssal plains - but already know they're far more vibrant and complex than previously thought.

Still unknown are the impacts of giant machines' stirring up plumes of sediment that are likely to drift over vast distances underwater. Researching this question is a difficult and slow task - and is unlikely to be fully answered within the two-year period initiated by Nauru.

DSM - Deep Sea Mining ↠
Future Battle? - Seabed Mining ..

Thursday, September 26, 2019

Communication Infrastructure

.
Electric Union - When Communication Went Global > .
24-1-29 [Did E Peng III cut Baltic submarine cable?] - Update > .
24-11-20 Accident or Sabotage? Undersea Cables Cut in Baltic Sea - nwyt > .
24-11-7 Could Russia take out the West's internet? - CaspianReport > .
24-8-5 Hidden US~X Battle for Fiber-Optic Supremacy | WSJ > .
24-6-20 Hazardous Life of an Undersea Cable - Asianometry > .
24-6-6 1.4 million km cables drew a US-Xina undersea tech war - Lei > .
24-2-16 Undersea Cables, Sabotage, Internet, Surveillance - CuDr > . skip > .
23-12-20 Undersea fibre-optic cables could be geopolitical frontier | ABC Aus > .
23-12-5 Protecting Allied critical undersea infrastructure - NATO > .
23-9-30 Internet Backbone = Hidden Infrastructure - B1M > .
23-6-30 US & Xina Squabbling over SEA-ME-WE 6 Cable - Half > .
22-10-14 [Cables another target for Pootin's desperate sabotage?] - nwyt > . 
22-9-21 How China’s Military Drills Could Choke Off Taiwan’s Internet | WSJ > .
Undersea Cables, Pipelines - Naval Gazing >> .

The dawn of instant global communication can be traced back to entrepreneur Cyrus West Field and his long-shot experiment to link the United States and Europe by telegraph in the 1850s.

Polyethylene, radar, and submarine cables ..


The underwater web > .

Wednesday, September 18, 2019

Kammhuber Line

Kammbuber Line & German Radar > .
Operation Biting - Raid on Bruneval - tnh > .

The Kammhuber Line was the Allied name given to the German night air defense system established in July 1940 by Colonel Josef Kammhuber. It consisted of a series of control sectors equipped with radars and searchlights and an associated night fighter. Each sector would direct the night fighter into visual range with target bombers.

The Line was very effective against early Bomber Command tactics. However, the German method was analyzed by the RAF and a counter measure developed. On the night of 30/31 May 1942 in its 1,000 plane raid against Cologne Bomber Command introduced the use of the bomber stream. The concentration of bombers through a few of the boxes resulted in the defenses being overwhelmed. In response, the Germans converted their ground radar into a radar network, which would follow the path of the British bombers, while a controller directed the night fighters into the stream. Measure and counter measure continued until October 1944, when German defenses were no longer able to respond..........

When Germany organised its air defences into the Kammhuber Line, it was realised by the British (Bomber Command's Operational Research Section (BC-ORS)) that if the RAF bombers were to fly in a bomber stream they could overwhelm the night fighters who flew in individual cells directed to their targets by ground controllers. It was then a matter of calculating the statistical loss from collisions against the statistical loss from night fighters to calculate how close the bombers should fly to minimise RAF losses.

British intelligence soon discovered the nature of the Kammhuber Line and started studying ways to defeat it. At the time RAF Bomber Command sent in their planes one at a time to force the defenses to be spread as far apart as possible, meaning that any one aircraft had to deal with little concentrated flak. This also meant the Himmelbett centres were only dealing with perhaps one or two planes at a time, making their job much easier.

At the urging of R.V. Jones, Bomber Command reorganized their attacks into streams of bombers – the so-called Bomber stream, carefully positioned so the stream flew down the middle of a single cell. Data provided to the British scientists allowed them to calculate that the bomber stream would overwhelm the six potential interceptions per hour that the German "Tame Boar" (Zahme Sau) night fighters could manage in a Himmelbett zone. It was then a matter of calculating the statistical loss from collisions against the statistical loss from night fighters to calculate how close the bombers should fly to minimise RAF losses. The introduction of Gee radio navigation in 1942 allowed the RAF bombers to fly by a common route and at the same speed to and from the target, each aircraft being allotted a height band and a time slot in a bomber stream to minimize the risk of collision. The first use of the bomber stream was the first 1,000 bomber raid against Cologne on the night of 30/31 May 1942. This tactic was extremely effective, leading to fighting between Kammhuber and Erhard Milch, his boss.

Although the success rate of the Line dropped, the network of radars and plotting stations continued to prove their worth. Now when a raid started, night fighters from any base within range were directed into the stream, where it was hoped they would be able to find aircraft with their radar. At the same time a massive building program started to add hundreds of Würzburgs to the system, although the infrastructure needed was extensive. The boxes were initially the radius of the Würzburg radars, about 22 miles, but more powerful radar later on made the boxes up to 100 miles across. Eventually, the line of boxes was several deep, especially around larger towns and the Ruhr valley. Once again the system started to score increasing successes against the British raids.

The British were ready for this development, and as soon as the rates started to improve – for the Germans – they introduced "Window". Dropping strips of foil from a number of "lead" bombers, the German radar operators saw what appeared to be a stream entering their box, each packet of chaff appearing to be a bomber on their displays. Night fighters were then sent to attack this stream, only to find empty space. Just as the fighters reached the false stream, the "real" stream appeared hundreds of miles away, too far to be attacked. The first time this was used was during Operation Gomorrah (a week-long bombing campaign against Hamburg) and proved spectacularly effective. The German radar operators eventually learned to spot the lead bombers at the edge of the windowing, making it less effective. The British had held back from introducing Window for over a year lest the technique be adopted by the Germans and used against British cities.

A more sophisticated method for blinding the German radar was "Mandrel", a jamming signal broadcast from aircraft accompanying the bomber stream or later certain bombers themselves. This progressed into jamming techniques against individual German radar types and spoofing radars to see bomber streams that weren't there. The British also attacked the communications between ground stations and fighters, with Operation Corona, broadcasting false directions in authentic accents over the radio.

One other element was long-range nightfighters operating against the German nightfighters, using a system called "Serrate" to home in on the German nightfighter radar signals. At least three squadrons equipped with Bristol Beaufighter and de Havilland Mosquito were part of No. 100 Group RAF supporting Bomber Command with electronic countermeasures.

https://en.wikipedia.org/wiki/Operations_research
.......
The Line was very effective at first, but was soon rendered useless by a simple change in tactics. The RAF directed all of its bombers to fly in a single stream, overwhelming the sectors, who could only intercept a single aircraft at a time. This led to a dramatic drop in interception rates compared to the raid size. The Line was eventually turned into a radar network, and the night fighters improved with their own radar sets to allow them to hunt on their own.
https://en.wikipedia.org/wiki/Kammhuber_Line .

Wednesday, September 11, 2019

Radio Direction Finding

https://www.youtube.com/watch?v=uBg45ro5MpU > .
Plane Safety (1938) > .

Radio Research Station at Ditton Park, Slough

The Radio Research Station at Ditton Park, Slough

Unique record of the Earth’s ionosphere – the electrified region of the Earth’s upper atmosphere, was painstakingly recorded from 1933 onwards at the Radio Research Station near Slough.

Scientists at the RRS were monitoring the ionosphere as it was then vital for long-distance radio communications. Shortwave radio is reflected by the ionosphere and allows the signal to be transmitted long distances over the horizon.

They had noted that the density of the ionosphere was extremely variable and had set up the monitoring station in order to look for patterns in this variability. Much of this is due to changes in solar activity.

The ionosphere is created when x-rays and extreme ultraviolet light from the sun are absorbed by our atmosphere, electrifying it. We now know, thanks to a fleet of spacecraft monitoring the sun, that not all of this variability can be explained by solar activity. Attention is increasingly turning to sources from the lower atmosphere and the ground.

But where to find ground events capable of leaving a signature at the edge of space? The answer lies in the past. World War Two witnessed an explosive arms race, which culminated, in its most extreme form, in the atomic bomb.

But most destructive energy still came from conventional weapons. Allied aircraft dropped over 2.75m tons of TNT, the equivalent of 185 Hiroshimas.

The RAF’s four-engined Lancaster bomber with its 11-ton payload could deliver more explosive energy than any other aircraft in World War II. The American Liberator could carry six tons, the Luftwaffe’s Heinkel 111 four.

Individual British bombs also grew more deadly. In 1944, two six-ton “Tallboys” capsized the German Tirpitz battleship, and the 11-ton “Grand Slam” could start landslides. Such seismic events were, of course, few and far between. Most of Bomber Command’s effort was targeted not at specific installations, but whole cities.

Here, too, the scale of ordnance was devastating. The RAF and US Air Force dropped 42,500 tons of high explosive on Berlin alone, plus 26,000 tons of incendiary bombs.

So-called “blockbuster” bombs – two, four or even six-ton barrels of boosted TNT – fused to explode a few hundred feet up, would blow off roof tiles and shatter windows within 500 metres.

Direct hits pulverised whole apartment blocks. Aircraft flying a mile above the blasts could have parts blown off and the pressure wave could even collapse the lungs of those caught within it.

Subsequent incendiaries would then penetrate structures, designed to set off a firestorm. This only fully succeeded twice – in Hamburg in August 1943 and Dresden in February 1945 – when tens of thousands perished.

The strategic bombing war documents numerous other area bombing raids, each of which involved hundreds of aircraft and up to 2,000 tons of high explosive.

The German authorities’ punctilious recording of the times and payloads of raids, coupled with RAF Bomber Command mission logs, made it possible to construct a database of possible ground events which might have produced shockwaves capable of being detected in the ionosphere.

Ionospheric records from the Radio Research Station are now archived by the UK Solar System Data Centre at the Rutherford Appleton Laboratory, UK. The record shown below is for 08:30 on September 8, 1940, the morning after the start of the London Blitz when 700 tons were dropped by the Luftwaffe.

By combining data from 152 major bombing raids, it was possible to determine that the ionosphere was weakened, albeit only slightly, by these events.

https://theconversation.com/world-war-ii-bombing-raids-in-london-and-berlin-struck-the-edge-of-space-our-new-study-reveals-103951

RDF

Scanning Chain Home Installations - The Last Zeppelin Raid 1939 - mfp > .


Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the object(s). Radio waves (pulsed or continuous) from the transmitter reflect off the object and return to the receiver, giving information about the object's location and speed.

Radar was developed secretly for military use by several nations in the period before and during World War II. The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging. The term radar has since entered English and other languages as a common noun, losing all capitalization.

The modern uses of radar are highly diverse, including air and terrestrial traffic control, radar astronomy, air-defence systems, antimissile systems, marine radars to locate landmarks and other ships, aircraft anticollision systems, ocean surveillance systems, outer space surveillance and rendezvous systems, meteorological precipitation monitoring, altimetry and flight control systems, guided missile target locating systems, ground-penetrating radar for geological observations, and range-controlled radar for public health surveillance. High tech radar systems are associated with digital signal processing, machine learning and are capable of extracting useful information from very high noise levels.

Other systems similar to radar make use of other parts of the electromagnetic spectrum. One example is "lidar", which uses ultraviolet, visible, or near infrared light from lasers rather than radio waves.

http://www.bbc.co.uk/history/topics/radar

https://www.youtube.com/watch?v=BSajdavR6Yw >


RADAR
Naval (ASV) and airborne (AI) RADAR
https://youtu.be/uTE-jHVIKJU?t=26m39s .


RADAR - Kammhuber Line - German night air defense system
The Kammhuber Line was the Allied name given to the German night air defense system established in July 1940 by Colonel Josef Kammhuber. It consisted of a series of control sectors equipped with radars and searchlights and an associated night fighter. Each sector would direct the night fighter into visual range with target bombers.
.........
When Germany organised its air defences into the Kammhuber Line, it was realised by the British (Bomber Command's Operational Research Section (BC-ORS)) that if the RAF bombers were to fly in a bomber stream they could overwhelm the night fighters who flew in individual cells directed to their targets by ground controllers. It was then a matter of calculating the statistical loss from collisions against the statistical loss from night fighters to calculate how close the bombers should fly to minimise RAF losses.

British intelligence soon discovered the nature of the Kammhuber Line and started studying ways to defeat it. At the time RAF Bomber Command sent in their planes one at a time to force the defenses to be spread as far apart as possible, meaning that any one aircraft had to deal with little concentrated flak. This also meant the Himmelbett centres were only dealing with perhaps one or two planes at a time, making their job much easier.

At the urging of R.V. Jones, Bomber Command reorganized their attacks into streams of bombers – the so-called Bomber stream, carefully positioned so the stream flew down the middle of a single cell. Data provided to the British scientists allowed them to calculate that the bomber stream would overwhelm the six potential interceptions per hour that the German "Tame Boar" (Zahme Sau) night fighters could manage in a Himmelbett zone. It was then a matter of calculating the statistical loss from collisions against the statistical loss from night fighters to calculate how close the bombers should fly to minimise RAF losses. The introduction of Gee radio navigation in 1942 allowed the RAF bombers to fly by a common route and at the same speed to and from the target, each aircraft being allotted a height band and a time slot in a bomber stream to minimize the risk of collision. The first use of the bomber stream was the first 1,000 bomber raid against Cologne on the night of 30/31 May 1942. This tactic was extremely effective, leading to fighting between Kammhuber and Erhard Milch, his boss.

Although the success rate of the Line dropped, the network of radars and plotting stations continued to prove their worth. Now when a raid started, night fighters from any base within range were directed into the stream, where it was hoped they would be able to find aircraft with their radar. At the same time a massive building program started to add hundreds of Würzburgs to the system, although the infrastructure needed was extensive. The boxes were initially the radius of the Würzburg radars, about 22 miles, but more powerful radar later on made the boxes up to 100 miles across. Eventually, the line of boxes was several deep, especially around larger towns and the Ruhr valley. Once again the system started to score increasing successes against the British raids.

The British were ready for this development, and as soon as the rates started to improve – for the Germans – they introduced "Window". Dropping strips of foil from a number of "lead" bombers, the German radar operators saw what appeared to be a stream entering their box, each packet of chaff appearing to be a bomber on their displays. Night fighters were then sent to attack this stream, only to find empty space. Just as the fighters reached the false stream, the "real" stream appeared hundreds of miles away, too far to be attacked. The first time this was used was during Operation Gomorrah (a week-long bombing campaign against Hamburg) and proved spectacularly effective. The German radar operators eventually learned to spot the lead bombers at the edge of the windowing, making it less effective. The British had held back from introducing Window for over a year lest the technique be adopted by the Germans and used against British cities.

A more sophisticated method for blinding the German radar was "Mandrel", a jamming signal broadcast from aircraft accompanying the bomber stream or later certain bombers themselves. This progressed into jamming techniques against individual German radar types and spoofing radars to see bomber streams that weren't there. The British also attacked the communications between ground stations and fighters, with Operation Corona, broadcasting false directions in authentic accents over the radio.

One other element was long-range nightfighters operating against the German nightfighters, using a system called "Serrate" to home in on the German nightfighter radar signals. At least three squadrons equipped with Bristol Beaufighter and de Havilland Mosquito were part of No. 100 Group RAF supporting Bomber Command with electronic countermeasures.

https://en.wikipedia.org/wiki/Operations_research
.......
The Line was very effective at first, but was soon rendered useless by a simple change in tactics. The RAF directed all of its bombers to fly in a single stream, overwhelming the sectors, who could only intercept a single aircraft at a time. This led to a dramatic drop in interception rates compared to the raid size. The Line was eventually turned into a radar network, and the night fighters improved with their own radar sets to allow them to hunt on their own.
https://en.wikipedia.org/wiki/Kammhuber_Line

RDF – Plane Safety ‘38

Battle Stations - Radar - Documentary + Rare Bonus Footage
https://www.youtube.com/watch?v=NRvcLNLe3VU
Under The Radar - Radar Technological Evolution
https://www.youtube.com/watch?v=BSajdavR6Yw

Chain Home:

Early Radar Memories .
http://spitfiresite.com/2010/04/early-radar-memories.html
Stories of the Battle of Britain 1940 – Chain Home .
http://spitfiresite.com/2010/08/stories-of-the-battle-of-britain-1940-chain-home.html
“The Spies Who Lost the Battle of Britain” .
http://spitfiresite.com/2010/11/the-spies-who-lost-the-battle-of-britain.html
Aboukir’s High-Altitude Spitfire .
http://spitfiresite.com/2010/04/aboukirs-high-altitude-spitfire.html
http://spitfiresite.com/2010/04/deflating-british-radar-myths-of-world-war-ii.html

Filter Room
http://www.telegraph.co.uk/history/battle-of-britain/11865303/The-Battle-of-Britain-as-it-happened-on-September-15-1940-live.html .

Boffins Beat Belligerents >> .
RAF Uxbridge - WW2 command centre > .

RDF – Plane Safety ‘38 > .

RDF - New Forest
New Forest, WW2 ..

Early Radar Memories
http://spitfiresite.com/2010/04/early-radar-memories.html
Stories of the Battle of Britain 1940 – Chain Home
http://spitfiresite.com/2010/08/stories-of-the-battle-of-britain-1940-chain-home.html
“The Spies Who Lost the Battle of Britain”
http://spitfiresite.com/2010/11/the-spies-who-lost-the-battle-of-britain.html
Aboukir’s High-Altitude Spitfire
http://spitfiresite.com/2010/04/aboukirs-high-altitude-spitfire.html


http://spitfiresite.com/2010/04/deflating-british-radar-myths-of-world-war-ii.html




RAF Bawdsey > .

1940s: Radar, RAF High Speed Launch (HSL), AFS, 1941 Jowett pump, Austin 12 taxi, Austin K Fire Truck, WLA & David Brown VAK1 tractor, cavity magnetron & H2S, Daimler Scout Car (Dingo), Bren Gun, gas turbine = Whittle jet engine, Gloster Pioneer & Meteor, ejector seat, Aston Martin DB1 & DB2 & DBR1

https://www.youtube.com/user/EnginePorn/playlists?view=1&shelf_id=0&sort=dd .

Of zoos and fire-fighting, today and in wartime
https://web.archive.org/web/20110902160428/http://worldwarzoogardener1939.wordpress.com/2011/03/22/of-zoos-and-fire-fighting-today-and-in-wartime/

Britain's greatest machines - 1940s > .

https://www.youtube.com/watch?v=eWSMJFeBfj4&list=PLrWZd-gHTah5CuJVlQgNFmk5jeh0-7mNx

sī vīs pācem, parā bellum

igitur quī dēsīderat pācem praeparet bellum    therefore, he who desires peace, let him prepare for war sī vīs pācem, parā bellum if you wan...