Chinese electronic surveillance ship

Insignius

Junior Member
From what a F18 super hornet ?

But these type of eavesdropping missions are really important, collecting electronic emissions from American carrier strike groups will be beneficial in hunting them down

USN routinely practice “zero” emissions while in transit by switching off anything that can be switched off but low level of emissions can be detected if your close enough and that Chinese ship is close enough

Yeah, I mean those Nimitz and Ticos can dash with 30+ knots while the 815 can only do 20 knots maximum.

Would be pretty good if China could use a DDG hull with the same propulsion to build a purpose made fast intelligence ship that can keep up with any enemy group. Sailing within a few miles, trying to gain encrypted datalink emissions.
 

Hendrik_2000

Lieutenant General
Now this is interesting OVH radar ship with enormous radar coverage via Han patriot
Chinese navy’s new ‘compact’ radar will allow it to keep watch over an area the size of India

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Chinese military scientists have made significant headway in upgrading China’s radar technology, and are developing an advanced “compact size” radar for the navy’s carrier fleet that will allow it to maintain constant surveillance over an area the size of India.

The improved system will enable the Chinese navy to spot incoming threats from enemy ships, aircraft and missiles much earlier than the existing technology allows, according to scientists who chaired China’s Over-the-Horizon (OTH) radar programme.


The programme emerged into the public spotlight on Tuesday when its lead scientist, Liu Yongtan, a professor with the department of electric and information engineering at Harbin Institute of Technology, received China’s top science award from President Xi Jinping at a national ceremony.


Another military scientist, Qian Qihu, was also honoured at the event in the Great Hall of the People in Beijing on Tuesday for his work on underground nuclear shelter facilities.

Liu told state media that land-based, over-the-horizon radar had greatly increased the range of an area the PLA could monitor.

“Relying on traditional technologies, our surveillance and monitoring could only cover about 20 per cent of our maritime territory,” Liu told state news agency Xinhua. “With the new system, we can cover the whole area.”

Land-based OTH radars were first developed by the US and Soviet Union during the cold war, letting them keep watch over thousands of kilometres of territory by sending radio waves up into the ionosphere and bouncing them back to earth.

However, many of these facilities have since been shut down or suspended due to their vulnerabilities.

The radars need enormous amounts of power and have to be built on flat and open terrain.

Deploying the technology at sea means scientists have to overcome a number of challenges, including adjusting the radar’s frequency, depolarisation and direction to match the distance of the target zone and conditions in the ionosphere.

Their immobility also makes them highly vulnerable to attack, prompting military planners to shift their focus to airborne early warning and control systems.

However, a senior member of Liu’s team confirmed to the South China Morning Postthat the new system would be a ship-based OTH radar system.

The floating radar “will increase our navy’s information gathering capabilities in critical areas” including the South China Sea, Indian Ocean and Pacific Ocean, said the researcher, who requested anonymity because of the sensitivity of the issue.

Deploying the technology at sea means scientists have to overcome a number of challenges, including adjusting the radar’s frequency, depolarisation and direction to match the distance of the target zone and conditions in the ionosphere.

The receiving ship also must use complex techniques to compensate the motion caused by the sea.

China is not the only nation developing the technology. The Raytheon Company, a major US defence contractor, was granted a patent in 2016 for a similar system.

The Raytheon design involves a transmitting vessel and several receiving ships with antennae mounted on the deck.

Radio waves are directed into the sky by the transmitter to be collected by the receiving ships, which then pass on the signals to aircraft carriers via satellite or airborne relays.

According to Raytheon, the system has a detection range of over 1,000km (620 miles) and can cover an area of more than one million square nautical miles – the equivalent of 3.4 million square kilometres, which is about the size of India.

By contrast, the radar range of a US naval destroyer is about 300km while a Boeing E-3 Sentry radar can reach more than 600 kilometres.

The designs of the Chinese system remain classified, according to some mainland radar scientists.
 

palejade

New Member
Registered Member
Overall 9 surveillance ships


1 x Type 815 pennant 851
4 x Type 815G pennants 852-855
4 x Type 815A pennant 856-859

Interesting last 4 units launched in 20 months

1 in 2016
2 in 2017
1 so far in 2018

Does anyone know what the last two Type 815A Ships are called?
I think 856 is Kaiyangxing (Mizar) and 857 is Tianquanxing (Megrez) but I have not yet seen the names of the other two.
 

Marjohn

New Member
Registered Member
Does anyone know what the last two Type 815A Ships are called?
I think 856 is Kaiyangxing (Mizar) and 857 is Tianquanxing (Megrez) but I have not yet seen the names of the other two.
I don't remember where I found this: 858 Yuhengxing - 859 Jinxing (it was one year ago...)
 

palejade

New Member
Registered Member
Thank you for your helpful replies.
I believe that these ships are named after stars or planets.
What does Yuhengxing mean? Is it Saturn?
I have guessed that Jinxing is Venus.
Photos of these will be interesting to see, eventually...
 

xyqq

Junior Member
Registered Member
857 Tianshuxing got refueled from AOE-967 Chaganhu together with LPD-987 Wuzhishan and DDG-175 Yinchuan. The flotilla traveled more than 8,000 nautical miles in one month.

857-987-967.jpg
 
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xyqq

Junior Member
Registered Member
I thought that Tianshuxing was 855, and Tianquanxing was 857
I am pretty sure that 857 is Tianshuxing based on multiple sources, including the news report about this exercise.

By the way, a Z-9C helicopter was in the picture, probably from the fifth ship in the flotilla, Type 054A FFG-568 Hengyang, where the photographer was.

Z-9C-distance.jpg
 
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