China is the first country to provide such sensitive missile equipment to Pakistan. A statement by the Chinese Academy of Sciences confirmed the deal

China has sold Pakistan a powerful optical tracking and measurement system that could speed up the development of multi-warhead missiles by Islamabad, according to a media report on Thursday.

Chinese authorities declassified information about the deal through a statement on the Chinese Academy of Sciences (CAS) website. The statement, evidence that Beijing is supporting Islamabad’s rapidly developing missile programme, said China is the first country to export such sensitive equipment to Pakistan.

What is the advanced missile system all about?

 * The system is crucial for missile testing and has high-performance telescopes with laser ranger, cameras,infrared detector and centralised computer system.
* It is capable of recording HD images of a missiles' trajectory - from being launched to all the way when the warheads are deployed.
* It claims to provide cutting-edge visual information about a missile's flight path - helping in development and application.

India and the US have long accused China of supporting Islamabad’s missile and nuclear development programme but credible evidence of such cooperation can rarely be found in the public domain, making the CAS statement a rarity.

Zheng Mengwei, a researcher with the CAS Institute of Optics and Electronics in Chengdu, Sichuan province, confirmed to the South China Morning Post that Pakistan had bought a “highly sophisticated, large-scale optical tracking and measurement system” from China.

The Pakistani military recently deployed the Chinese-made system “at a firing range” for use in testing and developing its new missiles, Zheng was quoted as saying.

As India has built single-warhead missiles that are bigger and cover longer distances, Pakistan has focused on developing multiple independently targetable re-entry vehicles (MIRVs), a type of missile carrying multiple nuclear warheads that can be directed towards different targets, the Post reported.

The US Defence Intelligence Agency confirmed in March that Pakistan conducted the first test launch of its nuclear-capable Ababeel missile in January 2017, “demonstrating South Asia’s first MIRV payload”.

A Chinese team enjoyed “VIP treatment” during the nearly three months it spent in Pakistan assembling and calibrating the tracking system and training technical staff on how to use it, the statement said.

“The system’s performance surpassed the user’s expectations,” it said, adding it was considerably more complex than Pakistan’s home-made systems. The statement did not reveal how much Pakistan paid for the system.

An optical system is a critical component in missile tests. It usually has a pair of high-performance telescopes equipped with a laser ranger, high-speed camera, infrared detector and a centralised computer system that automatically captures and follows moving targets.

The device records high-resolution images of a missile’s departure from its launcher, stage separation, tail flame and, after the missile re-enters atmosphere, the trajectory of the warheads it releases.

The uniqueness of the Chinese system lay in its use of four telescope units, “more than normally required”, Zheng said.

Each telescope, with a detection range of several hundred kilometres, is positioned in a different location, with their timing synchronised with atomic clocks. The telescopes jointly provide visual information of unprecedented detail and accuracy, which missile developers can use to improve designs and engine performance.

Using more telescopes allows the system to track more warheads simultaneously from different angles, reducing the risk of losing a target.

Zheng said he could not elaborate on the technology or where in Pakistan it was being used as it involved the country’s defence interests. “We simply gave them a pair of eyes. They can use them to look at whatever they want to see, even the moon,” he said.

Though the Ababeel has a range of 2,200km, it can deliver multiple warheads to different targets. The technology can be used to overwhelm a missile defence system, wiping out an enemy’s nuclear arsenal in one surprise attack.

“There are growing concerns that MIRV technology will tip the strategic balance between India and Pakistan and destabilise the subcontinent,” the report said.

Outside Pakistan, military experts believe it will take more time before the Ababeel is ready for use in battle. It is thought to be in an early stage of development, with plenty of room for improvement.

High-quality optics are essential in missile development, especially MIRVs, said Rong Jili, deputy director at the Beijing Institute of Technology’s School of Aerospace Engineering.

Other types of tracking devices, such as radar, can collect more precise data at longer distances, but the Chinese-made optical system provides an intuitive, close-up look at real-life action that missile developers crave, he said.

“Seeing it with our own eyes is completely different from mining dry data. It helps to not only diagnose problems, but also generate inspiration,” Rong said.

China has sold Pakistan a wide array of military gear, including warships, combat jets, short-range missiles, diesel submarines and surveillance drones.