| 词条 | BRAC Onnesha |
| 释义 |
| name = BRAC Onnesha | names_list = Bird BB | image = | image_caption = | image_size = | mission_type = Technology demonstration Earth observation | operator = BRAC University | COSPAR_ID = 1998-067MX | SATCAT = 42823 | website = | mission_duration = Elapsed: {{time interval|7 July 2017 09:11|show=md|sep=,}} | spacecraft_type = 1U CubeSat | manufacturer = | launch_mass = {{convert|1|kg|lb|abbr=on}} | dimensions = | power = | launch_date = {{start-date|3 June 2017, 21:07:38}} UTC[1] | launch_rocket = Falcon 9 FT, CRS-11 | launch_site = Kennedy LC-39A | launch_contractor = SpaceX | entered_service = 7 July 2017, 09:11 UTC | disposal_type = | last_contact = | decay_date = | orbit_reference = Geocentric | orbit_regime = Low Earth | orbit_semimajor = {{convert|6779|km|mi|abbr=on}} | orbit_eccentricity = 0.0007937 | orbit_periapsis = {{convert|395.5|km|mi|abbr=on}} | orbit_apoapsis = {{convert|406.2|km|mi|abbr=on}} | orbit_inclination = 51.6401° | orbit_period = 92.57 minutes | orbit_epoch = 9 August 2017, 03:06:33 UTC[2] | apsis = gee }} BRAC Onnesha is the first nanosatellite built in Bangladesh to be launched into space. The satellite was designed and built in conjunction with Kyushu Institute of Technology{{'s}} Birds-1 program, which has the goal of helping countries build their first satellite. It was designed and built over a two-year period. The satellite has imaging capabilities and can transmit songs to Earth that are uploaded to its memory. It was launched on a Falcon 9 rocket to the International Space Station on 3 June 2017, after which it was released from the Kibō module. The satellite completes an orbit once every 90 minutes. BackgroundJapan supports non-spacefaring countries to build their first satellite through a program called The Joint Global Multi-Nation Birds Satellite project (BIRDS). Besides Japan, four countries participated in the Birds-1 program: Ghana, Mongolia, Nigeria, and Bangladesh.[3] The five satellites were identical in their design.[4] DevelopmentThe idea to develop a satellite was conceived in 2013. On 15 June 2016, Syed Saad Andaleeb, Vice Chancellor at BRAC University, signed a contract with the Kyushu Institute of Technology (Kyutech), Japan, on behalf of BRAC University. This led to the collaborative building of the first experimental university-made nano-satellite of Bangladesh, designed, developed and assembled by three Bangladeshi students at the Kyushu Institute of Technology. On 8 February 2017, Andaleeb received BRAC Onnesha from Kyutech's President Yuji Oie and Mengu Cho, Kyutech's Director of the Laboratory of Spacecraft Environment Interaction Engineering.[5] BRAC University took up an initiative to start space and remote sensing research in collaboration with Kyutech and the Space Research and Remote Sensing Organization (SPARRSO).[6] BRAC University has built a ground station at its Mohakhali campus to analyse data and photographs sent from space for further research purposes.[7] Professor Mengu Cho of Kyutech said, "BRAC ONNESHA was easy to build and affordable and their prime objective was to educate the students so that they could go back to build one completely by themselves, presumably in October 2017."[8] The two-year period spanning the development, construction, launch and operation of the satellites engaged three university students from each of the five participating countries. All five satellites had to be identical to each other in the class of a 1U CubeSat.[8] The satellite cost about {{US$|500,000}} to manufacture and launch.[10] MissionLaunchSpaceX launched the satellite on its CRS-11 mission to the International Space Station (ISS) on 3 June 2017. The satellite was carried in a Dragon spacecraft on a Falcon 9 rocket, launched from NASA's Kennedy Space Center Pad 39A. This was the 100th launch from Pad 39A and the first time SpaceX reused one of its Dragon capsules.[1] Once on the ISS, the satellite was deployed from the Japanese Kibō module.[9]The satellite orbits the Earth at an altitude of approximately {{convert|400|km|miles}} and at an inclination of 51.6 degrees. The satellite travels around the Earth every 92 minutes at a velocity of {{convert|7.67|km/s|mph}}[10][11] OperationsThe satellite communicates with seven ground stations: one in each of the countries participating in the Birds-1 program, and one each in Thailand and Taiwan.[3] Bangladesh's ground station, inaugurated 25 May 2017, is on the top of a building at BRAC University.[12] BRAC Onnesha is a nanosatellite shaped as a {{convert|10|cm|in}} cube capable of completing one orbit {{convert|400|km|mi}} above the ground in 90 minutes and passing over Bangladesh four to six times a day. The primary objective of the satellite is to image vegetation, urbanization, flood, water resources, and forestry.[13]References1. ^1 {{cite web |url=https://spaceflightnow.com/2017/06/03/reused-dragon-cargo-capsule-launched-on-journey-to-space-station/ |title=Reused Dragon cargo capsule launched on journey to space station |last1=Clark |first1=Stephen |work=Spaceflight Now |date=3 June 2017 |accessdate=24 July 2017 |archiveurl=https://web.archive.org/web/20170604054222/https://spaceflightnow.com/2017/06/03/reused-dragon-cargo-capsule-launched-on-journey-to-space-station/ |archivedate=4 June 2017 |deadurl=no}} 2. ^{{cite web |url=http://heavens-above.com/orbit.aspx?satid=42823 |title=Bird BB - Orbit |work=Heavens Above |date=9 August 2017 |accessdate=9 August 2017}} 3. ^1 {{cite web |url=http://space.skyrocket.de/doc_sdat/bird.htm |title=Bird B, BTN, G, J, M, MYS, N, PHL (BRAC Onnesha, GhanaSat 1, Toki, Mazaalai, Nigeria EduSat 1) |publisher=Gunter's Space Page |access-date=24 July 2017}} 4. ^{{cite news |url=https://www.newsghana.com.gh/mongolia-to-send-first-satellite-off-to-space-on-june-4/ |title=Mongolia to send first satellite off to space on June 4 |work=News Ghana |date=5 June 2017 |accessdate=8 July 2017 |deadurl=no |archiveurl=https://web.archive.org/web/20170629044626/https://www.newsghana.com.gh/mongolia-to-send-first-satellite-off-to-space-on-june-4/ |archivedate=29 June 2017 |df=dmy-all}} 5. ^{{cite news |url=http://www.thedailystar.net/country/brac-university-says-hi-first-nano-satellite-1357831 |title=Brac University says 'hi' to first nano-satellite |work=The Daily Star |date=8 February 2017 |accessdate=9 July 2017}} 6. ^{{cite news |url=http://archive.newagebd.net/235830/bangladeshi-nano-satellite-orbit-mid-2017/ |title=Bangladeshi nano satellite to be in orbit mid 2017 |work=New Age |date=16 June 2017 |accessdate=9 July 2017}} 7. ^{{cite web |url=http://www.bracu.ac.bd/news/ground-station-nation%E2%80%99s-first-nano-satellite-inaugurated-brac-university |title=Ground station for nation's first nano-satellite inaugurated at BRAC University |publisher=BRAC University |date=26 May 2017 |access-date=5 February 2018}} 8. ^{{cite news |url=http://indianexpress.com/article/technology/science/mongolia-launches-its-first-satellite-to-space-4687089/ |title=Mongolia to send its first satellite to space on June 4 |work=The Indian Express |agency=Indo-Asian News Service |date=3 June 2017 |accessdate=13 July 2017 |deadurl=no |archiveurl=https://web.archive.org/web/20170622071936/http://indianexpress.com/article/technology/science/mongolia-launches-its-first-satellite-to-space-4687089/ |archivedate=22 June 2017 |df=dmy-all}} 9. ^{{cite web |url=http://iss.jaxa.jp/en/kiboexp/news/170707_cubesat_birds.html |title=Successful deployment of five "BIRDS project" CubeSats from the "Kibo" |date=7 July 2017 |publisher=JAXA}} 10. ^{{cite web |url=http://www.ghananewsagency.org/science/president-akufo-addo-congratulates-all-nations-university-for-ghanasat-1-satellite-119346 |title=President Akufo-Addo congratulates All Nations University for Ghanasat-1 Satellite |agency=Ghana News Agency |date=7 July 2017}} 11. ^1 {{cite web |url=https://face2faceafrica.com/article/ghanasat-1 |title=Ghanaian Engineers Launch Ghanasat-1, Join Space Race |access-date=24 July 2017 |publisher=Face2Face Africa |last1=Babatunde |first1=Mark |date=11 July 2017}} 12. ^1 {{cite web |url=http://www.thedailystar.net/country/bangladesh-first-nano-satellite-brac-university-brac-onnesha-launched-space-1415347 |access-date=28 July 2017 |work=The Daily Star |title=Bangladesh's first nano-satellite Brac Onnesha launched into space |date=4 June 2017}} 13. ^{{cite news |url=http://www.thedailystar.net/backpage/first-nanosatellite-ready-launch-1358035 |title=First nanosatellite ready for launch |work=The Daily Star |date=9 February 2017 |accessdate=9 July 2017}} External links
9 : 2017 in Bangladesh|Artificial satellites orbiting Earth|CubeSats|First artificial satellite of a country|Satellites of Bangladesh|Spacecraft launched in 2017|Spacecraft launched by Falcon rockets|Student satellites|Satellites deployed from the International Space Station |
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