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Moon palace participants won't be home for Spring Festival
Source:Agencies - Global Times Published: 2018/2/16 10:11:58


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Photo: VCG



Four college students in Beijing share a unique reason they're unable to make it home for Spring Festival this year; they are participants in simulated moon colony.

Space technology researchers at Beijing's Beihang University began the year-long experiment on the campus on May 10, 2017, amid China's increasing ambitions to explore space.

Eight students volunteered to live on the Yuegong-1 facility, nicknamed the Moon Palace. They are physically isolated from the outside world, and completely dependent on the facility's eco-system.

China expects to launch 40 rockets into space in 2018, likely more than Russian and the US combined, said experts.

China also announced plans to send a lunar lander to the far side of the moon later this year, first in the world. The country's future moon missions include bringing samples of the moon back to earth.

Four of the students first spent 60 days in the Yuegong-1 before being rotated out and a second group of four entered the facility where they lived for 200 days.

In late January, the first group of four took their second turn in the facility. This group will spend the remaining 105 days of the experiment in Yuegong-1.

Physically and emotionally healthy

The program is aimed at testing how a closed eco-system can support human life with only minimal replenishment from the earth, a key to long-term survival in space or on another celestial body.

This is the second isolation experiment under the Yuegong program. The first was conducted in 2014 when participants lived for 105 days in isolation.

Officials from Beihang University, where the facility is located, say the current experiment is running smoothly. Team members living in Yuegong-1 are in good health and have been growing vegetables and other plants. The volunteers will also be tested on their ability to respond to emergencies to test limits of the "moon palace."

Liu Hong, chief architect of "Yuegong-1" and a professor of Beihang, said that after the current program is completed they will apply to be included in China's moon and mars programs. The goal will be to develop living facilities for future deep space exploration that can provide oxygen, water and food for the crew.

The Yuegong's 2014 test run provided 100 percent of required oxygen and water and 55 percent of crew's food needs.

Most of the volunteers in the Yeugong missions were senior college students at Beihang.

Liu Guanghui, the leader of the second team in the current experiment, said he was both physically and mentally healthy during his 200 days in Yuegong-1, during which his team conducted daily science experiments without a day off.

When the volunteers' mission was completed they were given a health check-up and quarantined at the campus hospital.

Another participant Chu Zhengpei said all team members were subjects of experiments. Their hair, saliva, nails and excrement were all collected for study. The psychology, emotions and even the intestinal bacteria of the participants were monitored.

During their stay in the facility they encountered three unexpected power outages, which became chances to test their emergency management capability.

The participants has some real-world worries while they were in isolation. "My classmates were all busy looking for a job. I have missed the job-hunting season and the civil service exam," said one of the volunteers Wang Wei.

Chu, who spent 200 days locked in the facility, was happy to be "back on earth," but said she will miss regular, self-sufficient life in isolation, away from the hectic urban life.
 
. . .

CCTV reported on the spaceplane concept on March 7. An animation accompanying the report depicts a sleek, twin-engine mothership carrying the spaceplane to high altitude. The spaceplane’s single rocket engine boosts the vehicle to low orbit, where it opens dorsal bay doors and deploys a small satellite. The spaceplane returns to Earth and lands like an airplane.
A graphic on the news report indicated the spaceplane would be orbit-ready in 2030.

The new vehicle, reportedly under development by state-owned China Aerospace and Industry Corporation, is actually the second major spaceplane concept to appear in China in recent years. In 2008, a robotic vehicle similar in shape and size to the 29-feet-long X-37B was photographed under the wing of a Chinese bomber.
In January 2011, the Chinese vehicle, reportedly named “Divine Dragon,” flew on its first atmospheric test flight. It’s unclear whether Divine Dragon’s development continued after 2011.
 
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:D Image of a new MARV undergoing hypersonic wind tunnel testing

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1月13日15点10分,长征二号丁运载火箭在我国酒泉卫星发射中心发射升空,成功将陆地勘查卫星三号送入预定轨道。
At 15:10 on January 13, the Long March 2D carrier rocket at the Jiuquan Satellite Launch Center in China successfully sent the Land Survey Satellite No. 3 into its orbit.

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军报记者北京3月17日电(李潇帆、记者邹维荣)2018年3月17日15时10分,我国在酒泉卫星发射中心用长征二号丁运载火箭,成功将陆地勘查卫星四号发射升空,卫星进入预定轨道,发射任务取得圆满成功。该星主要用于开展陆地资源遥感勘查。

此次任务是长征系列运载火箭的第268次飞行。

PLA Daily Reporter Beijing, March 17 (by Li Yufan and reporter Zou Weirong) At 17:10 on March 17, 2018, China successfully launched the Land Exploration Satellite No. 4 at the Jiuquan Satellite Launch Center with the Long March 2D rocket. The satellites entered the preset orbit and the mission was a success. The satellite is mainly used to carry out remote sensing of land resources.

This mission was the 268th flight of the Long March series of launch vehicles.

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NOTAM:

A0903/18 - A TEMPORARY RESTRICTED AREA ESTABLISHED BOUNDED BY: N180540E1115053-N184350E1111900-N181640E1104331-N173836E1111528 BACK TO START.VERTICAL LIMITS:SFC-UNL. ALL ACFT SHALL BE FORBIDDEN TO FLY INTO THE RESTRICTED AREA. SFC - UNL, 29 MAR 17:41 2018 UNTIL 29 MAR 18:20 2018. CREATED: 27 MAR 03:19 2018

2018年3月30日~01:43,北斗三号M5,M6将由CZ-3B/YZ-1自西昌发射
30 Mar 2018 ~01:43 BJT, Satellite Beidou-3 M5 & M6 by CZ-3B/YZ-1 rocket from Xichang launch center.
 
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Is China's space laser for real?
It's not a Death Star super laser. It's a space broom.

By Jeffrey Lin and P.W. Singer Yesterday at 11:50pm

depositphotos_4958998_l-2015.jpg

It's not this.
China's space broom isn't the Death Star super laser. It's an orbiting satellite with a laser only powerful enough to heat up pieces of space junk, so that they change course burn up in the atmosphere.
Depositphotos

In a recent article in scientific journal Optik, a faculty member at China's Air Force Engineering University proposed building a laser-armed satellite, a "broom" to do battle with the pernicious problem of space debris.

Laser-armed satellites, naturally, generate a lot of attention, and so the proposal of Quan Wen and his co-authors has made its way into several splashy headlines. But it's more than hype. The concept addresses a real (and growing) problem: there's something like 17,852 artificial objects orbiting earth (PDF), and an estimated 300,000-plus pieces of space debris larger than a marble. At the fast orbital velocities up in space, even large craft like the International Space Station have to maneuver out of the way of small objects to avoid catastrophic damage.

Quan's research looks at the efficacy of a hypothetical laser operating near the infrared spectrum. It would blast away targeted space debris for a couple minutes, at a rate of twenty bursts of laserfire a second. That amount of energy would be sufficient to vaporize part of the object's mass. Contrary to public imagination, space laser brooms like the one proposed don't actually vaporize space debris, but rather "burn off" a chunk. This would create sufficient kinetic force from the chemical combustion to change the object's orbit. With that change in direction, the debris will quickly reenter the atmosphere and burn up. Because of atmospheric distortion, it's much more effective to zap space debris with a satellite than, say, a ground-based laser.

Of course, for now it's all theory. The laser broom would need to be actually mounted on a satellite and lofted into orbit to test its true efficacy. And even then, it'd still face some legal grey areas (technically speaking, space debris are still the property of owners of the satellites they originated from, which is very, very difficult to track) as well as major suspicion about the idea of implementing a weapon-like technology up in space.

Like many others, China's space program has both civilian and military applications. (The AoLong 1 satellite, for example, has a robotic arm for mechanically de-orbiting space debris that has has potential as an anti-satellite sabotage technology.) And so there's an obvious question: can the space laser broom be an anti-satellite weapon? It's certainly possible, though a cost-effective laser broom would need to be small—just big enough to take care of small debris. To quickly deal serious damage to enemy spacecraft, one would need a much larger space laser weapon; perhaps an orbital battlemoon?

Popular Science

Peter Warren Singer is a strategist and senior fellow at the New America Foundation. He has been named by Defense News as one of the 100 most influential people in defense issues. He was also dubbed an official "Mad Scientist" for the U.S. Army's Training and Doctrine Command. Jeffrey is a national security professional in the greater D.C. area.




Tiangong-1 2018 Reentry V1.5 Part1

First posted 10 March 2018; Updated 29 March 2018

Table of Contents

1. Introduction
2. Background
3. The "12 March 2018" laser strikes event
4. Post-"12 March 2018" event's analysis
5. Official Chinese statement after the "12 March 2018" event
6. The geomagnetic storm of 19 March 2018
7. Tiangong-1 final week
8. The coup de grâce
9. Post-reentry analysis


1. Introduction

Has There Been a Loss of Control?

Where will Tiangong-1 reenter?

How Difficult is it to Accurately Predict a Reentry?

Will objects from this reentry hit me or my property?
:rolleyes:

As all these questions can only expose how biased and ill-intentioned the Western propaganda machine is, hell-bent in smearing the ever more outstanding Chinese space achievements (due to desperation and jealousy as always), let us reassure all our Pakistani readers and other foes as well, with some clarifications.

China has been working on developing laser weapons since the 1960s, and the People’s Liberation Army in 2015 published the book Light War that gives a central role to fighting a future war using lasers.

As already disclosed by the media, China is known to have operated at least 3 ASAT laser stations, in Anhui, Sichuan and Xinjiang.

In 2005, Chinese researchers have successfully conducted a satellite-blinding experiment using a 50-100 kilowatt capacity mounted laser gun in Xinjiang province. The target was a low orbit satellite with a tilt distance of 600 kilometers. The diameter of the telescope firing the laser beam is 0.6 meters wide. The accuracy of acquisition, tracking and pointing is less than 5 microradians.

Three researchers, Gao Minghui, Zeng Yuquang and Wang Zhihong disclosed plan for even more powerful ASAT lasers in The Chinese Optics journal in December 2013.

All worked for the Changchun Institute for Optics, Fine Mechanics and Physics – the leading center for laser weapons technology.

The plan proposed the building of a 5-ton chemical laser as a combat platform capable of destroying satellites in orbit. Given funding by the Chinese military, which is in charge of China’s space program, the anti-satellite laser could be deployed by 2023.


In another study that was led by Quan Wen, a researcher from the Information and Navigation College at China's Air Force Engineering University, with the help of the Institute of China Electronic Equipment System Engineering Company, laser used in removal of space debris have been investigated.
The simulation results show that, debris removal is affected by inclination and RAAN, and laser station with the same inclination and RAAN as debris has the highest removal efficiency. It provides necessary theoretical basis for the deployment of space-based laser station and the further application of space debris removal by using space-based laser.

Although high secrecy is strictly enforced, one could compare the case of Tiangong-1 space laboratory with the ill-fated Phobos-Grunt Mars probe, that reentered over the South Eastern Pacific Ocean on 15 January 2011.

There was no random reentry over highly populated area. This time Tiangong-1 will also reenter over the Pacific Ocean, in a remotely controlled mode.

This suggests that China will secretly use its laser ASAT stations, to produce a series of thrusts generated by heating until vaporizing the outer part of the spacecraft, thus lowering the perigee of Tiangong-1. Notice Tiangong-1 passes every day up to five times over China, heading south-Eastward toward the south Pacific.

Upon reaching the ultimate ~140 km altitude threshold, where a complete orbit is no longer possible, the coup de grâce will be given by piercing the forward part of the pressurized module, thus allowing all the remaining gaz to escape at high velocity, and generating an additional negative vector thrust (think of a coca cola bottle).
Alternately, by piercing the propellant tank (i.e. Hydrazine) would even provide a more powerfull thrust, but the targeting requires a higher accuracy.

If this procedure succeedes, this would eventually allow a safe reentry half an orbit later over the predesignated area over the Pacific Ocean.

What makes the preparation for this highly risky space billiard operation possible is that China can count on its world fastest supercomputers.
As reported by the state television CCTV13, it it took 20 days, instead of the otherwise 12 months, for China's Sunway-TaihuLight, the world's fastest supercomputer, for simulating the numerical reentry prediction, which are in accordance with wind tunnel simulations.


This is the least China could do, as even North Korea has already disclosed its own Korean-style Anti-Meteor Laser System, needed to protect its planned future Lunar base, back in a New Year 2018 show!

:enjoy:

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▲ Map of Tiangong-1 ground track

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▲ An official map of the Phobos-Grunt reentry released by Roskosmos by 20:00 Moscow Time on Jan. 15, 2012.
Notice the similarity with Tiangong-1 regarding the relative location of the impact zone and the ASAT laser stations!


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▲ Space imagery of Tianshan ASAT laser station. 中国天山部署战略反卫星激光武器

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▲ China's Sunway-TaihuLight, the world's fastest supercomputer, used for simulating the numerical reentry prediction of Tiangong-1.

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▲ China's Sunway-TaihuLight, the world's fastest supercomputer, used for simulating the numerical reentry prediction of Tiangong-1.
Note that the space lab will present its APAS docking ring forward due to the overall aerodynamics and especially the solar pannels at the rear section, therefore allowing a good view and stable laser targeting of the said frontal section.


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▲ At T=40:54 North Korean Lunar base hit by meteor shower; Video published on Jan 1, 2018

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▲ 10 North Korean astronauts combining beams of laser to thwart a meteor shower as depicted in a New Year 2018 show

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▲ At T=40:54 North Korean Lunar base hit by meteor shower; At T=41:33 Combined laser beams used to protect the North Korean Lunar base from meteor shower, in a New Year 2018 show. Video published on Jan 1, 2018

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Target in range, all PLA Laser Stations ready to fire!:flame:


______________________________________


2. Background
The Opening Solar Concentrator

"
Yang-Sui (阳燧) Solar Ignitor, World’s Oldest Solar Device

During the sixth century BCE, Confucius wrote about the common use of curved mirrors shaped from shiny metal to concentrate the rays of the sun for making fire. These became known as yang-suis – translating to solar ignitors, or burning mirrors.

According to the great philosopher, upon waking up the eldest son would attach a solar ignitor to his belt as he dressed for the day. It was his duty to focus the solar rays onto kindling to start the family’s cooking fire.

According to another early text, the Zhouli, which describes rituals dating far back into Chinese antiquity, “The Directors of the Sun Fire have the duty of transferring with burning mirrors the brilliant flames of the sun to torches for sacrifice.”

Although scholars found over the years many ancient texts discussing solar ignitors, the discovery of an extant yang sui eluded them for centuries. Quite recently came the Eureka moment. Digging up a tomb that dated to about 3,000 years ago, a team of archaeologists found in the hand of a skeleton a bowl-shaped metal object. While the inner side could have passed for a wok, the exterior trough had a handle in its center. That’s what caught the eye of the two archaeologist in charge of the dig, Lu Demming and Zhai Keyong. They immediately brought the relic back to the local museum and ordered its specialists to make a mold from the original and then cast a copy in bronze.

After polishing its curved surface to a high degree of reflectance, the inquisitive archaeologists focused sunlight onto a piece of tinder just as the eldest son would have done so many years past, and in seconds the combustible material burst into flames. “This verified without a doubt that the purpose of the artifact is to make fire,” Lu and Zhai later wrote, assured of having found the oldest solar device in the history of humanity.

Now that the world could see what a real yang-sui looked like, museums retrospectively identified 20 more previously unclassified objects as solar ignitors. Multiple molds for turning out yang suislater found at a Bronze Age foundry in Shanxi province, close to the first find, suggest a mass market once existed for them. In fact, yang suis were probably as ubiquitous in early China as are matches and lighters today. The yang sui “should be regarded as one of the great inventions of ancient Chinese history,” remarked its discoverers, impressed by the ability of their forefathers to figure out the complex optics for such optimal performance so early in time.

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▲ Yang-Sui (阳燧) Solar Ignitor

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▲ Yang-Sui (阳燧) Solar Ignitor

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▲ Yang-Sui (阳燧) Solar Ignitor

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▲ Flashforward: Korean-style Gigantic Yang-Sui (阳燧) Solar Ignitor?


Source:
http://baike.baidu.com/link?url=g5Z...0gjx417MbY5GY4Td0zcZXuadDnxbftC2jaaYWfhpkvj-_
http://cleantechnica.com/2014/06/05/worlds-oldest-solar-device/
,,
:flame:


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Due to the atmospheric turbulence, targeting is made difficult, increasing with the magnification power.
The image is constantly perturbed by the flowing air like the reflected image over a watery surface.

But to be able to target smaller part of an orbiting spacecraft, the aperture of the optics must be increased.

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▲ ISS Max 62° Pass On 3/25/18, through an Aperture 355.6 mm (14 in), Focal Length 3910 mm (154 in) optical instrument ( Hedge HD 14 with a 1.6X barlow and red Astrodon filter on my ZWO ASI290 mono camera). March 25, 2018

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▲ Chinese Space Station Tiangong 1 on 01-20-18 from Manorville, NY USA. Max pass was 62° at 17:58:37pm EST. The telescope was an Edge HD 14 with a 2X barlow. Imaging camera was ZWO ASI174 mono with an Astrodon red filter.

Thus two solutions. Space based platforms totally immune to the atmospheric turbulences or any stratospheric, near-space platforms. Alternately, ground-based platform operating at the highest altitude possible in order to reduce the atmospheric effect like the Tianshan Mountain or Tibetan Peaks.

For the ground-based platform, the use of adaptive optics (AO) are needed to counter the turbulence.

Current AO Systems require a guide “star”. Using adaptive optics to compensate for atmospherically induced wavefront distortions requires a remote beacon.
For a satellite the beacon can be a retroreflector illuminated by a ground-based laser.
Synthetic beacons, generated by laser backscatter from the atmosphere, offer a solution to this problem.
These beacons are produced by using Rayleigh backscatter, or scattering by the air molecules, at altitudes below 20 km, or by using resonant backscatter from the mesospheric sodium layer at an altitude of approximately 90 km.

iopscience.iop.org/article/10.1086/423904/pdf

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Tiangong-1 2018 Reentry V1.5 Part2

3. The "12 March 2018" laser strikes event

Confirming earlier assessment, the Chinese PLA ASAT laser stations seem to have already proceeded with their first in a series of corrective laser surgical pinpoint accuracy strikes, as shown in the sudden increased decay rate of Tiangong-1 correlated by the official TLE of March 12!

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▲ It is clearly visible an anomalous burst from the TLE 18070.1268 (March 11) to 18072.1107 (March 13), 6 consecutive TLEs.

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▲ After the big variation in the decay rate on March 12, the totally controlled reentry is predicted at a slightly earlier date: 2-3 April 2018

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▲ Groundtrack of a very good pass of Tiangong-1 over China's laser stations on 12 March 2018, especially a frontal approach over Tianshan ASAT station!

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▲ Attitude and Inclination of Tiangong-1, as of 14 March 2018: totally controlled reentry is predicted for 2-3 April 2018

Coincidence? I think not!

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______________________________________


4. Post-"12 March 2018" event's analysis

Latest post-"12 March 2018" astrophotographies of China's orbital space laboratory Tiangong-1

Notice the regular and constant brightness of the path, indicating a stable attitude with no tumbling after the first laser strikes!

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https://defence.pk/pdf/attachments/...1/?temp_hash=e4d24499e00af15d7774fb0ec52e7788
https://pbs.twimg.com/media/DYKeyPDVoAIlcka.jpg
https://twitter.com/makkisse999/status/973515308710313984
#天宮1号 (TIANGONG 1)の通過を撮影。予報1.3等級、北西から東へ。最高通過点高度29°(方位28°)。3/13, 19:06~18:08 頃、太陽高度-10°。明るい&雲多い,と状況悪かったが、ちらっと見えました。。 露出10秒x6枚 比較明合成, 対角魚眼 トリミング
▲ TIANGONG 1 pass captured from Tanegashima on 13 March 2018, 19:06~18:08 JST, 10 seconds x 6, fisheye, APS-C10 mm, PENTAX K-5II s
Estimated Magnitude: 1.3


dypwemcvmaarzn2-jpg-large-jpg.460994

https://defence.pk/pdf/attachments/...4/?temp_hash=830ea009297af6bd801354cea69d77ff
https://pbs.twimg.com/media/DYPwEMcVMAArZN2.jpg
https://twitter.com/makkisse999/status/973886180964974593
#天宮1号 (TIANGONG 1)の通過を撮影。予報0.5等級、北西から東へ。最高通過点高度48°(方位31°)。18:54~18:56 頃、太陽高度-7~-8°。昨日よりも更に明るいが雲は無かった。目視出来たような・・・。画像調整強。 露出5秒x21枚 比較明合成, 対角魚眼 トリミング
▲ TIANGONG 1 pass captured from Tanegashima on 14 March 2018, 18:54~18:56 JST, 5 seconds x 21, f/4 ISO 100, APS-C10 mm, PENTAX K-5II s
Estimated Magnitude: 0.5


For comparison, Tiangong-2, without any tumbling and with stable attitude:

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https://defence.pk/pdf/attachments/...2/?temp_hash=e4d24499e00af15d7774fb0ec52e7788
https://pbs.twimg.com/media/DYCk-4zU0AA1E2P.jpg
https://twitter.com/makkisse999/status/972959236274601984
#天宮2号 (TIANGONG-2)の通過を撮影。3月12日 5:20~5:21, 予報1.0等級。最高通過点高度67°。影出からMax高度を少し過ぎたあたりまで。アルクトゥルスと北斗七星の間を通過。1、2枚目が空いたのは連写用レリーズのロック忘れ。 追尾(ポータブル赤道儀) 露出20秒×4枚 比較明合成,
▲ TIANGONG 2 pass between Arcturus and Uras Major captured from Tanegashima on 12 March 2018, 5:20~5:21 JST, 20 seconds x 4, f/3.2, ISO 2500, APS-C21 mm, PENTAX K-5II s
Estimated Magnitude: 1.0


:enjoy:


______________________________________


5. Official Chinese statement after the "12 March 2018" event

More smoking gun, or rather smoking lasers!:flame:
:lol:


Chinese official statement, suggesting a successful first series of laser strikes:

"
Descent of China’s Tiangong-1 will not cause damage to earth: expert

March 14, 2018

According to the latest information issued by China’s manned space engineering office, since Feb. 25 to Mar. 4, 2018, Tiangong-1 was orbiting in stable condition and good shape at an average height of about 251.5 kilometers (perigee height: 238.6 km; apogee height: 264.4 km; orbital inclination: 42.79 degrees).

China has been monitoring Tiangong-1, Zhu said, adding that the space lab will burn up after entering the atmosphere and the remaining wreckage will fall into a designated area of the sea, without endangering the Earth’s surface.

Aerospace expert Pang Zhihao explained that an international tradition to handle retired large spacecrafts operated at near-earth orbits is to let them fall to an abyssal zone in southern Pacific Ocean far away from the continents.

Being called the “graveyard of spacecraft”, the water was the falling location for Mir space station and Progress spacecraft of Russia, and the Compton Gamma Ray Observatory of the US, Pang added.

http://en.people.cn/n3/2018/0314/c90000-9437070.html
,,

Coincidence? I think not!

200w_d-gif.459351


:enjoy:


______________________________________

6. The geomagnetic storm of 19 March 2018

Due to severe space weather caused by solar activities, a geomagnetic storm on 19 March 2018 is resulting in an increased decay rate, accelerating the date of reentry of Tiangong-1, around 3 April±1 day.

:flame:

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▲ Geomagnetic storm on 19 March 2018

Radar imagery indicating a good physical integrity of Tiangong-1, allowing the final coup de grâce that will be given by piercing the forward part of the pressurized module, thus allowing all the remaining gaz to escape at high velocity, and generating an additional negative vector thrust (think of a coca cola bottle). This would eventually allow a safe reentry half an orbit later over the predesignated area over the Pacific Ocean.

1521630436722_09022017-22000-jpg.460998

▲ Tiangong-1 image taken with radiotelescope at Fraunhofer on 21.3.2018

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▲ Tiangong-1 image taken with radiotelescope at Fraunhofer on 21.3.2018

:enjoy:
 

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Tiangong-1 2018 Reentry V1.5 Part3

7. Tiangong-1 final week

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▲ Artistic representation of the controlled reentry of Tiangong-1 through PLA ASAT laser beams

Notice a forecast by some Western media, made 24 March 2018, confirming the last pass over China's Tianshan ASAT laser station before ending in the southern hemisphere. But the reentry zone is a little bit farther than in the South Pacific, continuing Northeastward in the South Atlantic, as no coup de grâce laser strikes have been modeled for the numerical simulation.

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▲ According to the forecast made by Satview.org on 24 March 2018, the space lab's reentry will occur over the South Atlantic on Monday, 02 Apr 2018 at 21:22 UTC

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▲ Other forecasts as of 24 March 2018: ESA 30 March-3 April; Aerospace 3.5 April±3 days; Chinese forum 2 April±1 day

Weather forecast over Tianshan ASAT laser station as of 24 March 2018, indicates that 31 March will be sunny and with some clouds at night, 1 April sunny and rainy at night, 2 April sunny and cloudy at night, 3 April sunny and with some clouds at night, meaning that the conditions for a laser targeting might not be optimal but still feasible.

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▲ Weather forecast over Tianshan ASAT laser station, as of 24 March 2018: 31 March sunny and with some clouds at night, 1 April sunny and rainy at night, 2 April sunny and cloudy at night, 3 April sunny and with some clouds at night.

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▲ According to the forecast made by Satview.org on 25 March 2018, the space lab's reentry will occur over the Pacific on Monday, 02 Apr 2018 at 3:09 UTC

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▲ According to USstratcom forecast reported by Satview.org on 29 March 2018, the space lab's reentry will occur over the Pacific on Sunday, 01 Apr 2018 at 00:52 UTC

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▲ Other forecasts as of 29 March 2018:
China Manned Space 1 April±1 day (UTC+8)
ESA 31 March-1 April afternoon;
JSpOC 1 April 00:52±15 hours (UTC);
Aerospace 1.1 April±1.0 days (UTC);
Chinese forum 2 April±1 day (UTC+8)


First China Manned Space (CMS) official forecast

天宫一号目标飞行器轨道状态公告(3月28日)

据中国载人航天工程办公室发布,2018年3月28日,天宫一号运行在平均高度约202.3公里的轨道上(近地点高度约193.9公里、远地点高度约210.8公里、倾角约42.67度),预计北京时间2018年4月1日±1天再入大气层


Note:
"姿态稳定" (stable attitude) no longer mentioned since 19 March 2018
"形态未发生异常" (no abnormal shape, meaning fully intact) no longer mentioned since 28 March 2018.

http://www.cmse.gov.cn/art/2018/3/28/art_810_32396.html

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▲ Tiangong-1 28 March 2018 solar transit. Equipment: 150mm F/5 Refractor, Baader Herschel wedge, ASI 174MM, Red filter.

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▲ Tiangong-1 28 March 2018 solar transit. Equipment: 150mm F/5 Refractor, Baader Herschel wedge, ASI 174MM, Red filter.

From the above ground images, it is obvious that the APAS docking ring is no longer pointed forward, as very small period rotations have been observed.

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http://
https://media.giphy.com/media/BZhymY15wKUiI4GJ39/giphy.gif
https://twitter.com/Fraunhofer_FHRe/status/978616595609157635
▲ Highly topical radar image video of Tiangong-1 based on data recorded 27 March 2018. Altitude: 200,5 km perigee, Rotation speed has increased, now 2,2°/s -> 2:23 min per one turn


Target in range, all PLA Laser Stations ready to fire!:flame:

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8. The coup de grâce


TBD
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9. Post-reentry analysis

TBD
 
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China sends twin BeiDou-3 navigation satellites into space
Source: Xinhua| 2018-03-30 06:26:14|Editor: Liangyu


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China sends twin satellites into space with a single carrier rocket, adding two more members for its domestic BeiDou Navigation Satellite System (BDS), in Xichang of southwest China's Sichuan Province, on March 30, 2018. (Xinhua/Liang Keyan)

XICHANG, Sichuan, March 30 (Xinhua) -- China on Friday sent twin satellites into space with a single carrier rocket, adding two more members for its domestic BeiDou Navigation Satellite System (BDS).

The Long March-3B carrier rocket lifted off from Xichang Satellite Launch Center in southwest China's Sichuan Province at 1:56 a.m. The launch was the 269th mission for the Long March rocket family.

The twin satellites are coded as the 30th and 31st satellites in the BDS.

They entered orbit more than three hours after the launch and will work together with six previously launched BeiDou-3 satellites once they pass a series of tests.

The satellites and the rocket for Friday's launch were developed by the Innovation Academy for Microsatellites at the Chinese Academy of Sciences and China Academy of Launch Vehicle Technology, respectively.

Named after the Chinese term for the Big Dipper, the BeiDou system started providing independent services over China in 2000 and will serve countries along the Belt and Road by the end of 2018.

By around 2020, when the BDS goes global, it will have more than 30 satellites.


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Video -> 【我国成功发射第三十、三十一颗北斗导航卫...-来自中国军视网-微博视频
 
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航空航天港9ifly
今天 08:53 来自 iPhone客户端
#发射消息# 我国计划于31日午间在太原卫星发射中心,用长征四号丙火箭以一箭三星方式,发射高分一号02、03、04星。其指标、性能、状态一致,均属于空间基础设施规划的业务卫星。这是我国今年第十次航天发射。
期待十全十美、十战十捷!

08:53 today 9ifly.cn weibo

# Launch message # China plans to launch Gaofen-1 satellite no. 02, 03 and 04 from the Taiyuan Satellite Launch Center on 31st March around 11:20 noon time, using one Long March 4C rocket for all three satellites. This would be China’s tenth space launch this year.
Looking forward to perfect ten for ten!
 
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中国航天科技集团
今天 12:08 来自 iPhone客户端
3月31日11点22分,在太原卫星发射中心,长征四号丙运载火箭托举高分一号02、03、04星发射升空。随后,三颗卫星准确进入预定轨道,发射任务取得圆满成功。

China Aerospace Science and Technology Group
Today 12:08

At 11:22 on March 31, at the Taiyuan Satellite Launch Center, the Long March 4C carrier rocket lifted the Gaofen-1 02, 03, and 04 satellites. Subsequently, the three satellites accurately entered the preset orbit and the launch mission is a complete success.

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中国航天科技集团
今天 12:08 来自 iPhone客户端
3月31日11点22分,在太原卫星发射中心,长征四号丙运载火箭托举高分一号02、03、04星发射升空。随后,三颗卫星准确进入预定轨道,发射任务取得圆满成功。

China Aerospace Science and Technology Group
Today 12:08

At 11:22 on March 31, at the Taiyuan Satellite Launch Center, the Long March 4C carrier rocket lifted the Gaofen-1 02, 03, and 04 satellites. Subsequently, the three satellites accurately entered the preset orbit and the launch mission is a complete success.

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Dear @JSCh if you can you speak at all, why is the Long March 4C's payload fairing nose cone so different and non-aerodynamic in design, as compared to the CZ-2E/F/G for instance?

These thingy on top and side thingummy, why does CZ-2F not have them? The type of orbit, SSO in this case seems not to be the reason. Is it specific to Taiyuan SLC?

:rolleyes1:
 
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Dear @JSCh if you can you speak at all, why is the Long March 4C's payload fairing nose cone so different and non-aerodynamic in design, as compared to the CZ-2E/F/G for instance?

If these needles thingy(?) and side thingummy are indeed static dischargers, why does CZ-2F not have them? The type of orbit, SSO in this case seems not to be the reason. Is it specific to Taiyuan SLC?

:rolleyes1:
The pictures came from CAST (China Aerospace Science and Technology)'s weixin account.

It says,

执行此次发射任务的长四丙火箭由航天科技集团八院抓总研制。这是该型火箭首次在太原卫星发射中心以“一箭三星串联”的方式发射卫星,也因此,火箭采用了长四丙火箭中的最高构型,近49米。三颗卫星自上而下分别装在整流罩和两个载荷舱中。

为了适应任务需求,型号队伍对长四丙火箭进行了一系列优化改进,不仅圆满完成了今年的首次任务,还为今后的高密度发射奠定了坚实基础。

The CZ-4C rocket that performed this launch mission was developed by the eight institutes of the Aerospace Science and Technology Group. This is the first time that this rocket has launched "one rocket, three satellites in series configuration" at Taiyuan launch center. As a result, the rocket has used the tallest configuration of CZ-4C, close to 49 meters. Three satellites were installed from top to bottom in the fairing and two load compartments.

In order to meet the mission requirements, the model team carried out a series of optimization and improvement of the CZ-4C rocket, which not only successfully completed the first mission of this year, but also help laid a solid foundation for meeting the upcoming high-intensity launch schedule.

----------***-------------​

Also is this link from eight institutes of CAST
 
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