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Harbin Institute of Technology
Two Micro-satellites "Longjiang 1" and "Longjiang 2," Developed by HIT, Launched Successfully
Updated: 2018/06/04
Written by: Ji Xing and Deng Dekuan
Translated by: Fu Ruiyao
Edited by: D. Parker
Pictures by: Ji Xing
Date: 2018-05-22
Two micro-satellites developed by Harbin Institute of Technology, together with the relay satellite named “Queqiao”, a legendary bridge in the Milky Way, lifted into space atop a Long March 4C carrier rocket from the Xichang Satellite Launch Center in Sichuan province at 5:28 pm May 21st, 2018. The two micro-satellite are named "Longjiang 1" and "Longjiang 2". They were designed to fly in formation in lunar orbit for future ultra-long wave radio interferometer mission.
Twenty-five minutes after their launch, the “Queqiao” and “Longjiang 1” and “Longjiang 2” entered into the earth-moon transit orbit. The perigee altitude was 200 km and the apogee altitude was 400,000 km. At this point the relay satellites and two micro-satellites separated from the Long March 4C carrier rocket. The satellites are now in orbit and operating as designed. After "Longjiang 1" and "Longjiang 2" each independently complete the earth-moon transfer flight they will enter the phase where the micro-satellites will orbit close to the lunar surface. HIT will be the first university in the world to send a micro-mini interferometer into lunar orbit.
It is worth mentioning that "Longjiang 2" is equipped with a miniature optical camera developed by the King Abdulaziz City for Science and Technology (KACST) in the Kingdom of Saudi Arabia. HIT contributed to the implementation of this "The Belt and Road" initiative.
When entering the moon’s elliptical orbit, the two micro-satellites “Longjiang 1” and “Longjiang 2” will complete the initial phase of their work, after a long-distance and near-distance approach with the support of ground monitoring and control. After this the two micro-satellites will fly in formation around the moon in orbit within variably relative distances within 1~10km, which will be the world's first lunar orbit formation flying.
Both "Longjiang 1" and "Longjiang No.2" are all equipped with low-frequency radio spectrometers developed by the National Space Science Center of the Chinese Academy of Sciences. The detection band covers the electromagnetic spectrum which ranges from 1 MHz to 30 MHz. The back of the moon serves as a natural shield against electromagnetic interference from the earth. When they fly to the back of the moon, they will conduct experiments such as ultra-long-wave radio astronomy observations, which will greatly enrich human understanding of the universe.
Two Micro-satellites "Longjiang 1" and "Longjiang 2," Developed by HIT, Launched Successfully | Harbin Institute of Technology
Also, news below from 54th Research Institute of CETC (China Electronics Technology Group Corporation). (My translation with help from machine translation)
零的突破|54所首个月球轨道有效载荷分系统在轨测试成功
54th Institute first Lunar orbit payload subsystem in-orbit test successful
中国电科五十四所
CETC 54th Institute
5月21日5点28分,在西昌卫星发射中心,由54所为哈尔滨工业大学月球轨道微卫星“龙江一号”和“龙江二号”研制的测控、数传分系统,随微卫星搭乘长征四号丙运载火箭升空,成功送入近地点约200公里,远地点约40万公里的地月转移轨道。
At 5:28 on May 21st, at the Xichang Satellite Launch Center, Harbin Institute of Technology Lunar orbit microsatellite "Longjiang No. 1" and "Longjiang No. 2" with measurement and control, data transmission subsystems developed by 54th Institute was launched by the Long March 4C rocket, and succeeded in entering trans-lunar orbit of about 200 kilometers perigee, 400,000 kilometers in apogee.
星箭分离后,两颗卫星的与测控系统开机工作正常,上午6:20微卫星A遥测正常,6:33微卫星B遥测正常,经过数天飞行后,于5月27日进入月球轨道开展天文观测任务,27日下午18:10数传设备开机进行数传,下午19:00经分析数传数据正常,通过数传通道传回了天文观测数据和月球背面的图片,该图片也是人类目前首次获得的月球背面照片,证明54所研制深空载荷测控和数传产品满足任务需求,实现了深空载荷零的突破。
After the separation of satellites, the two satellites telemetry tracking and control (TT&C) subsystems system are working properly. 6:20 AM Microsatellite A telemetry is normal, 6:33 Microsatellite B telemetry is normal, after a few days of flight, they enter lunar orbit on May 27 to carry out astronomical observation missions. At 18:10 pm on the 27th, the data transmission equipment is turned on for data transmission. At 19:00 in the afternoon, after analysis of the data transmission was deem to be normal, the astronomical observation data and the picture on the back of the moon were transmitted through the digital transmission channel. This picture is also the first time have obtained the photograph of farside of the moon, prove that the deep-space payload of TT&C and digital transmission products developed by 54th Institute meet the mission requirements and achieved first breakthrough in deep-space payload.
龙江微卫星上醒目的数传、测控天线
“龙江一、二号”卫星的数传测控子系统包括数传端机、测控应答机、数传天线及测控天线。与地球卫星相比,月球卫星有更多的设计约束。
经过项目组多次研讨和分析,最大程度地精减了重量及功耗,最终两个系统重量总共小于3公斤,不到同类型测控载荷重量的1/3。
项目于2016年5月启动,在较为紧张的研制周期内,项目团队紧密配合、高效沟通、真抓实干,实现了两套载荷系统的零故障交付。
产品先后经历了设计、评审、生产、试验、联试、验收等多个环节,项目组辗转哈尔滨、北京、喀什等地,完成了各阶段联试、深空对接、试验测试、发射保障等任务。3个专业部紧密配合,在质量管理部、调度与经济运行部等职能部门的支持和帮助下,出色的完成了研制任务。
孔繁青(左二)、庞宗强(左一)、张广宇(右一)、张世层(右二)在整星试验现场
目前,数传系统正在遥远的月球轨道上,不断向地球传回数据和图像,它的使命才刚刚开始。(At present, the data transmission system is on the far-off moon orbit, constantly transmitting data and images to the earth. Its mission has only just begun.) 项目组却没有时间欢庆这奋战两年方得来的胜利,新的征程已在等候——由54所自主研制的两颗试验卫星项目正紧锣密鼓地开展,来自54所的技术人员正在加班加点为了这一目标不懈奋斗。
“宜将剩勇追穷寇,不可沽名学霸王,天若有情天亦老,人间正道是沧桑”,在54所航天产品集成中心的北侧外墙面上,这首毛泽东的《七律:人民解放军占领南京》已刻在那里数十年,54所航天人正如诗中所云,一路披荆斩棘,在航天产业蓬勃发展的今天,不骄不躁、脚踏实地,为54所打赢每一场航天攻坚战!
零的突破|54所首个月球轨道有效载荷分系统在轨测试成功 - 中国电科五十四所
Two Micro-satellites "Longjiang 1" and "Longjiang 2," Developed by HIT, Launched Successfully
Updated: 2018/06/04
Written by: Ji Xing and Deng Dekuan
Translated by: Fu Ruiyao
Edited by: D. Parker
Pictures by: Ji Xing
Date: 2018-05-22
Two micro-satellites developed by Harbin Institute of Technology, together with the relay satellite named “Queqiao”, a legendary bridge in the Milky Way, lifted into space atop a Long March 4C carrier rocket from the Xichang Satellite Launch Center in Sichuan province at 5:28 pm May 21st, 2018. The two micro-satellite are named "Longjiang 1" and "Longjiang 2". They were designed to fly in formation in lunar orbit for future ultra-long wave radio interferometer mission.
Twenty-five minutes after their launch, the “Queqiao” and “Longjiang 1” and “Longjiang 2” entered into the earth-moon transit orbit. The perigee altitude was 200 km and the apogee altitude was 400,000 km. At this point the relay satellites and two micro-satellites separated from the Long March 4C carrier rocket. The satellites are now in orbit and operating as designed. After "Longjiang 1" and "Longjiang 2" each independently complete the earth-moon transfer flight they will enter the phase where the micro-satellites will orbit close to the lunar surface. HIT will be the first university in the world to send a micro-mini interferometer into lunar orbit.
It is worth mentioning that "Longjiang 2" is equipped with a miniature optical camera developed by the King Abdulaziz City for Science and Technology (KACST) in the Kingdom of Saudi Arabia. HIT contributed to the implementation of this "The Belt and Road" initiative.
When entering the moon’s elliptical orbit, the two micro-satellites “Longjiang 1” and “Longjiang 2” will complete the initial phase of their work, after a long-distance and near-distance approach with the support of ground monitoring and control. After this the two micro-satellites will fly in formation around the moon in orbit within variably relative distances within 1~10km, which will be the world's first lunar orbit formation flying.
Both "Longjiang 1" and "Longjiang No.2" are all equipped with low-frequency radio spectrometers developed by the National Space Science Center of the Chinese Academy of Sciences. The detection band covers the electromagnetic spectrum which ranges from 1 MHz to 30 MHz. The back of the moon serves as a natural shield against electromagnetic interference from the earth. When they fly to the back of the moon, they will conduct experiments such as ultra-long-wave radio astronomy observations, which will greatly enrich human understanding of the universe.
Two Micro-satellites "Longjiang 1" and "Longjiang 2," Developed by HIT, Launched Successfully | Harbin Institute of Technology
Also, news below from 54th Research Institute of CETC (China Electronics Technology Group Corporation). (My translation with help from machine translation)
零的突破|54所首个月球轨道有效载荷分系统在轨测试成功
54th Institute first Lunar orbit payload subsystem in-orbit test successful
中国电科五十四所
CETC 54th Institute
5月21日5点28分,在西昌卫星发射中心,由54所为哈尔滨工业大学月球轨道微卫星“龙江一号”和“龙江二号”研制的测控、数传分系统,随微卫星搭乘长征四号丙运载火箭升空,成功送入近地点约200公里,远地点约40万公里的地月转移轨道。
At 5:28 on May 21st, at the Xichang Satellite Launch Center, Harbin Institute of Technology Lunar orbit microsatellite "Longjiang No. 1" and "Longjiang No. 2" with measurement and control, data transmission subsystems developed by 54th Institute was launched by the Long March 4C rocket, and succeeded in entering trans-lunar orbit of about 200 kilometers perigee, 400,000 kilometers in apogee.
星箭分离后,两颗卫星的与测控系统开机工作正常,上午6:20微卫星A遥测正常,6:33微卫星B遥测正常,经过数天飞行后,于5月27日进入月球轨道开展天文观测任务,27日下午18:10数传设备开机进行数传,下午19:00经分析数传数据正常,通过数传通道传回了天文观测数据和月球背面的图片,该图片也是人类目前首次获得的月球背面照片,证明54所研制深空载荷测控和数传产品满足任务需求,实现了深空载荷零的突破。
After the separation of satellites, the two satellites telemetry tracking and control (TT&C) subsystems system are working properly. 6:20 AM Microsatellite A telemetry is normal, 6:33 Microsatellite B telemetry is normal, after a few days of flight, they enter lunar orbit on May 27 to carry out astronomical observation missions. At 18:10 pm on the 27th, the data transmission equipment is turned on for data transmission. At 19:00 in the afternoon, after analysis of the data transmission was deem to be normal, the astronomical observation data and the picture on the back of the moon were transmitted through the digital transmission channel. This picture is also the first time have obtained the photograph of farside of the moon, prove that the deep-space payload of TT&C and digital transmission products developed by 54th Institute meet the mission requirements and achieved first breakthrough in deep-space payload.
“龙江一、二号”卫星的数传测控子系统包括数传端机、测控应答机、数传天线及测控天线。与地球卫星相比,月球卫星有更多的设计约束。
经过项目组多次研讨和分析,最大程度地精减了重量及功耗,最终两个系统重量总共小于3公斤,不到同类型测控载荷重量的1/3。
项目于2016年5月启动,在较为紧张的研制周期内,项目团队紧密配合、高效沟通、真抓实干,实现了两套载荷系统的零故障交付。
产品先后经历了设计、评审、生产、试验、联试、验收等多个环节,项目组辗转哈尔滨、北京、喀什等地,完成了各阶段联试、深空对接、试验测试、发射保障等任务。3个专业部紧密配合,在质量管理部、调度与经济运行部等职能部门的支持和帮助下,出色的完成了研制任务。
目前,数传系统正在遥远的月球轨道上,不断向地球传回数据和图像,它的使命才刚刚开始。(At present, the data transmission system is on the far-off moon orbit, constantly transmitting data and images to the earth. Its mission has only just begun.) 项目组却没有时间欢庆这奋战两年方得来的胜利,新的征程已在等候——由54所自主研制的两颗试验卫星项目正紧锣密鼓地开展,来自54所的技术人员正在加班加点为了这一目标不懈奋斗。
“宜将剩勇追穷寇,不可沽名学霸王,天若有情天亦老,人间正道是沧桑”,在54所航天产品集成中心的北侧外墙面上,这首毛泽东的《七律:人民解放军占领南京》已刻在那里数十年,54所航天人正如诗中所云,一路披荆斩棘,在航天产业蓬勃发展的今天,不骄不躁、脚踏实地,为54所打赢每一场航天攻坚战!
零的突破|54所首个月球轨道有效载荷分系统在轨测试成功 - 中国电科五十四所
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