Гаофэнь-7 (高分七号, GaoFen-7, GF-7) с попутчиками - CZ-4B - Тайюань (TSLC) - 03.11.2019, 03:23 UTC

[zandr]

http://russian.news.cn/2019-11/03/c_138525351.htm

В Китае успешно запущен спутник высокого разрешения системы наблюдения Земли "Гаофэнь-7"
2019-11-03 17:05:58丨Russian.News.Cn
Тайюань, 3 ноября /Синьхуа/ -- В воскресенье в 11:22 с космодрома Тайюань в северокитайской провинции Шаньси был успешно запущен спутник высокого разрешения системы наблюдения Земли "Гаофэнь-7".
Спутник "Гаофэнь-7" был запущен с помощью ракеты-носителя "Чанчжэн-4Б".
Вместе со спутником "Гаофэнь-7" также были запущены другие три спутника, в том числе экспериментальный спутник высокого разрешения, научно-исследовательский спутник-1 Судана и спутник "Тяньи-15".
"Гаофэнь-7" -- первый в Китае спутник гражданского назначения для стереоскопической съемки и картографирования, который выполняет съемку с пространственным разрешением менее одного метра, был запущен в рамках национального проекта по развитию системы наблюдения Земли высокого разрешения.
Спутник "Гаофэнь-7", будучи научно-исследовательским спутником с самыми высокими требованиями к точности картографирования среди спутников высокого разрешения, будет использоваться для всеобщего обследования государственной территории, градостроительного планирования, статистического обследования и т. д.
Спутник и ракета-носитель были разработаны соответственно Китайской академией космических технологий и Шанхайской академией космических технологий, которые входят в состав Китайской корпорации космической науки и техники.

[Старый]

Как там положение относительно ранее обсуждавшейся группировки? 

[Старый]

Судя по фотографиям назначение этого аппарата - топография и обзорная разведка. 

[Liss]

Старый написал:
Как там положение относительно ранее обсуждавшейся группировки?  

Времени запуска 11:23 с Тайюаня соответствует местное время нисходящего узла 10:30. По высоте поглядим, когда скорректирует орбиту.

[tnt22]

Обнаружены ещё три объекта запуска

Код Выделить Развернуть

0 TBA - TO BE ASSIGNED
1 44704U 19072B   19307.39514252 -.00000073  00000-0  00000+0 0  9999
2 44704  97.4817  20.1081 0016128 280.8752 152.9652 15.23514237    35

0 TBA - TO BE ASSIGNED
1 44705U 19072C   19307.39443785 -.00000074  00000-0  00000+0 0  9993
2 44705  97.4861  20.1272 0018746 294.2862 135.7206 15.23602787    38

0 TBA - TO BE ASSIGNED
1 44706U 19072D   19307.45168726 -.00000073  00000-0  00000+0 0  9999
2 44706  97.5045  20.1983 0016323 282.8749 100.7619 15.23378793    4744704 / 2019-072B : 484 x 506 km x 97.482°, 94.52 min, 2019-11-03 09:29:00
44705 / 2019-072C : 482 x 508 km x 97.486°, 94.50 min, 2019-11-03 09:27:59
44706 / 2019-072D : 484 x 507 km x 97.505°, 94.52 min, 2019-11-03 10:50:25

[tnt22]

http://www.xinhuanet.com/english/2019-11/03/c_138525473.htm

China launches new Earth observation satellite
Source: Xinhua | 2019-11-03 19:15:07 | Editor: mingmei

TAIYUAN, Nov. 3 (Xinhua) -- China on Sunday launched a new Earth observation satellite, Gaofen-7, which will play an important role in land surveying and mapping, urban and rural construction and statistical investigation, according to the China National Space Administration (CNSA).

The Gaofen-7, launched on a Long March-4B rocket at 11:22 a.m. (Beijing Time) from the Taiyuan Satellite Launch Center in northern China's Shanxi Province, is China's first civil-use optical transmission three-dimensional surveying and mapping satellite that reaches the sub-meter level, CNSA said.

The satellite and carrier rocket were developed by the China Academy of Space Technology (CAST) and the Shanghai Academy of Spaceflight Technology under the China Aerospace Science and Technology Corporation.

The users of the Gaofen-7 satellite will be mainly from the Ministry of Natural Resources, the Ministry of Housing and Urban-Rural Development and the National Bureau of Statistics.

Via the same carrier rocket, three other commercial and scientific experiment satellites including one developed for Sudan were also sent into space.

The development of the Gaofen-7 has achieved a breakthrough in sub-meter level 3D mapping camera technology, meeting the highest mapping accuracy requirement among the Gaofen series Earth observation satellites, CNSA said.

It can obtain high-resolution optical 3D observation data and high-precision laser altimetry data and can realize 1:10,000 scale satellite 3D mapping for civil use in China, according to CNSA.

The satellite can meet the needs of users in basic mapping, global geographic information, monitoring and evaluation in urban and rural construction, agricultural survey and statistics, etc.

Cao Haiyi, chief designer of Gaofen-7 from CAST, said the satellite also has excellent positioning accuracy. For instance, it is able to accurately locate the roads in the countryside.

The new satellite will work together with other Gaofen satellites to form an Earth observation system with high resolution and high positioning accuracy, which will help promote international sci-tech industrial cooperation through data sharing and support the Belt and Road initiative, said Wang Xiang, chief commander of the Gaofen-7 satellite project.

Since the Gaofen project began in 2010, China has had an increasingly clearer view of the planet. Launched in April 2013, Gaofen-1 can cover the globe in just four days.

Gaofen-2, sent into space in August 2014, is accurate to 0.8 meters in full color and can collect multispectral images of objects greater than 3.2 meters in length.

Gaofen-4, launched in late 2015, is China's first geosynchronous orbit high-definition optical imaging satellite.

Gaofen-3, launched in August 2016, is China's first synthetic aperture radar imaging satellite.

Gaofen-5, launched in May 2018, has the highest spectral resolution of China's remote sensing satellites.

Gaofen-6, launched in June 2018, has a similar function to that of Gaofen-1, but with better cameras, and its high-resolution images can cover a large area of the earth.

Data from the Gaofen series satellites have been widely used in more than 20 industries across China. The project has helped reduce China's dependence on foreign remote sensing satellite data.

The focus of the project will be shifted to application in the future. An advanced land, atmosphere and ocean observation system is expected to be completed in 2020 to provide services for modern agriculture, disaster prevention and mitigation, resources and environmental management and public security protection, said CNSA.

[Старый]

tnt22 написал:
Gaofen-3, launched in August 2016, is China's first synthetic aperture radar imaging satellite.

Странно это. 

[tnt22]

(CCTV7, с 17:25 до 18:09)

[Liss]

Старый написал:
 

tnt22 написал:
Gaofen-3, launched in August 2016, is China's first synthetic aperture radar imaging satellite.

Странно это.  

Преднамеренно опущено слово "гражданский".
Впрочем, "Гаофэни" с номерами до 7 включительно вряд ли действительно гражданские, как заявляется -- скорее двойного назначения.

[tnt22]

Управляемое падение 1-й ст РН - Video (0:50)

[tnt22]

Long March-4B launches Gaofen-7 satellite

 SciNews

3 нояб. 2019 г.

https://www.youtube.com/embed/A7EbkUoz_kA (1:21)

[tnt22]

И наконец-то, большой красный экран:

 

[tnt22]

 Peter B. de Selding‏ @pbdes 22 мин. назад

China's @CGWIC Long March 4B rocket launches Chinese smallsat builder #Spacety 6U cubesat carrying 1st solid-iodine propulsion unit from @ThrustMe_ of France. Satellite has deployed & is communicating. Switch-on & results from ThrustME unit expected w/in a week.

[tnt22]

China launches first sub-meter class satellite into space

 CGTN

3 нояб. 2019 г.

China's first sub-meter high-resolution optical transmission stereo mapping satellite Gaofen-7 was successfully launched at the Taiyuan Satellite Launch Center in the northern province of Shanxi. Compared with ordinary optical remote sensing satellites, Gaofen-7 can draw three-dimensional images, meaning that all the buildings in the world will be a series of three-dimensional models once it is put into use. The successful launch means that the status quo of the high-resolution stereo remote sensing image market relying heavily on foreign satellites will be broken, leading China into a new era of independent large-scale space mapping.

https://www.youtube.com/embed/T88gLyiNrgc (1:52)

[tnt22]

Jonathan McDowell @planet4589 51 мин.51 минуту назад

Along with GaoFen 7 two small (50-100 kg) class satellites and one 6U cubesat were deployed. Huangpu-1 黄埔一号 was built by Lizheng Satellite (Shanghai) for the Dawan District Research Inst., Guangdong.    (cont.)


49 мин.назад

Dianfeng, also called XX1-08, is a Tianyi Research Sat for imaging, tests of laser comms, and tests of a French solid-iodine thruster.

Sudan Kexue Shiyan Weixing (Sudan science expt. sat.) is a Shenzhen DFH HIT satellite for Sudan.

[tnt22]

https://spacenews.com/china-tests-grid-fins-with-launch-of-gaofen-7-imaging-satellite/

China tests grid fins with launch of Gaofen-7 imaging satellite
by Andrew Jones — November 4, 2019


A Long March 4B lifts off from Taiyuan at 11:22 p.m. Nov. 2. Credit: CASC

TAMPERE, Finland — A Chinese Long March 4B delivered an Earth observation into orbit satellite late Saturday, with grid fins guiding the descent of the rocket's first stage.

The launch took place at 11:22 p.m. at the Taiyuan Satellite Launch Center in north China. For the first time the Long March 4B first stage carried a grid fin system to constrain the area in which it falls.

Most of China's launches take place at thee centers far inland, resulting in debris landing downrange. The grid fins are to both reducing risk and mark a step toward future retropropulsive landings and launcher reusability.

Both the launch and the test of the grid fin system were declared successful, with the first stage falling within the designated area.

The main payload for the mission was the Gaofen-7 optical Earth observation satellite, sent into a 489 by 528-kilometer orbit inclined by 97.5 degrees.

Gaofen-7 is designed to obtain high resolution optical 3D observation data and high-precision laser altimetry. Gaofen satellites are part of the civilian China High-resolution Earth Observation System.

Iodine propulsion, Sudan in orbit

Joining the main Gaofen-7 payload were two small satellites and a CubeSat. The Sudan Remote Sensing Satellite was developed by Shenzhen Aerospace Dongfanghong HIT Satellite Ltd. Huangpu-1, a technology demonstration satellite, was developed under the Shanghai Institute of Satellite Engineering.

The final passenger was developed by Spacety, a privately-owned Chinese satellite manufacturer based in Changsha. The 6U CubeSat is a technology test for multispectral imaging.

The Dianfeng spacecraft also carries a 0.4 kilogram laser communication payload from LaserFleet for technology verification tests. LaserFleet is a spin-off from the Chinese Academy of Sciences (CAS) with plans to build a low Earth orbit constellation providing broadband services that through laser communications.

The satellite includes an Iodine-based propulsion system developed and built by ThrustMe, a French company founded in 2017. The system a first-of-its-kind, non-pressurized, cold gas thruster fuelled by solid iodine, according to a ThrustMe press release.

Grid fins for debris, reusability

The hypergolic Long March 4B is designed and manufactured by the Shanghai Academy of Spaceflight Technology (SAST). It is also developing a new variant of its new generation Long March 6 kerolox launcher. Utilizing landing legs and grid fins it will be capable of Falcon 9-style vertical takeoff and vertical landing.

The China Academy of Launch Vehicle Technology (CALT) tested grid fins on a Long March 2C in July. CALT is developing its own retropropulsive landing capabilities for use on the planned Long March 8.

SAST and CALT are subsidiaries of the China Aerospace Science and Technology Corporation (CASC), China's main space contractor.

In 2017 CASC released a space transportation roadmap, outlining ambitions to make its launch vehicles fully reusable by 2035.


A grid fin attached to the Long March 4B. Credit: CASC

Earth observation system, launch cadence

China now has 14 Gaofen satellites in orbit forming a civilian Earth observation constellation. These provide panchromatic, multispectral and synthetic aperture radar imagery.

Unlike other satellites nominally included in the series, specifications for Gaofen-11, launched in July 2018, have not been released. Computer generated renders of the spacecraft on-orbit suggest a large aperture high resolution Earth observation satellite with resemblance to U.S. Keyhole-class satellites.

The Nov. 2 launch was China's 23rd of 2019, including two launch failures and a communications satellite stuck in geosynchronous transfer orbit. A Long March 3B launch of a Beidou navigation satellite could take place Monday from Xichang, despite an absence of airspace closure notifications.

Launch of a commercial Kuaizhou-1A solid rocket was scrubbed last week but is expected to launch in the coming days. Aboard will be a Jilin-1 high resolution commercial remote sensing satellite. This will be followed days later by a further Kuaizhou-1A launch from Jiuquan carrying small satellites for CAS.

[свернуть]

[Старый]

Спутник то не очень тяжёлый. Ракета в варианте "В", дополнительные ПН, рули на первой ступени. 

[tnt22]

Объекты запуска внесены в каталог, все КА - TBA

 

[tnt22]

Обнаружен 6-й объект запуска

Код Выделить Развернуть

0 TBA - TO BE ASSIGNED
1 44708U 19072F   19308.51263543  .00467330  00000-0  16032-1 0  9998
2 44708  97.5534  21.2542 0029973 296.0269 160.8937 15.27768915   20544707 / 2019-072F : 462 x 503 km x 97.553°, 94.25 min, 2019-11-04 12:18:11

[tnt22]