GiSAT-1

GiSAT-1 is a high-throughput geostationary communications satellite project by Global IP Cayman. It was to be designed and manufactured by Boeing on the Boeing-702MP platform. It is intended to serve 35 Sub-Saharan countries on the Ka band and offer over 150 Gbit/s of bandwidth with a flexible digital payload. It was expected to be launched in the fourth quarter of 2018.[2]

GiSAT-1
Mission typeCommunication
OperatorGlobal IP Cayman
Spacecraft properties
SpacecraftGiSAT-1
BusBoeing 702MP
ManufacturerBoeing
Launch mass6 t (5.9 long tons; 6.6 short tons)
Power15 kW
Start of mission
Launch dateCancelled[1]
Orbital parameters
Reference systemGeocentric
RegimeGeosynchronous
Transponders
BandKa band
Bandwidth>150 Gbps
Coverage area35 Sub-Saharan countries
 

Satellite description

GiSAT-1 was being designed and manufactured by Boeing on the Boeing 702MP satellite bus. It was estimated to have a launch mass of 6 tonnes (13,000 lb) and a design life of more than 15 years.[3]

It was to be powered by two wings, with four panels each, of triple-junction GsAs solar cells providing a total of 15 kW.[3]

It was to have a fully digital high-throughput Ka band payload offering over 150 Gbit/s of bandwidth. It should offer its services in all the African continent and have four gateways in Europe for connectivity.[4]

History

On September 12, 2016, Boeing announced another win for its Boeing 702MP platform, with the order of GiSAT-1 from the start-up Global IP Cayman. It would be a 6 t (6.6 tons) satellite with 15 kW of power generation with a fully digital high-throughput Ka band payload offering over 150 Gbit/s of bandwidth. It was at the time expected to be launched in 2019.[3][5][4]

On April 3, 2017, Global IP Cayman announced that it had signed an agreement with SpaceX to launch GiSAT-1 on a Falcon 9 rocket.[2]

On December 6, 2018, Boeing announced that it was cancelling the contract, citing lack of payment. According to the Wall Street Journal, Boeing intends to resell the nearly complete satellite to another customer.[1]

References

  1. ^ a b Spegele, Brian; O’Keeffe, Kate (December 6, 2018). "Boeing Backs Out of Global IP Satellite Order Financed by China". The Wall Street Journal. Retrieved December 30, 2018.
  2. ^ a b "Global-IP Announces the Selection of SpaceX to Launch its 150 Gbps GiSAT-1". BusinessWire. April 3, 2017. Retrieved April 3, 2017.
  3. ^ a b c "GiSat". Gunter's Space Page. September 12, 2016. Retrieved September 13, 2016.
  4. ^ a b "Boeing Communications Satellite to Expand Broadband Services in Africa". Boeing. September 12, 2016. Archived from the original on September 14, 2016. Retrieved September 13, 2016.
  5. ^ "Global IP Broadband Services". Global IP Cayman. Archived from the original on September 14, 2016. Retrieved September 14, 2016.
2019 in spaceflight

This article documents notable spaceflight events during the year 2019.

2020 in spaceflight

This article documents expected notable spaceflight events during the year 2020.

Boeing 702

Boeing 702 is a family of communication satellite bus designed and manufactured by the Boeing Satellite Development Center. It covers satellites massing from 1,500 kg (3,300 lb) to 6,100 kg (13,400 lb) with power outputs from 3 to 18 kW and can carry more than 100 high-power transponders.The baseline Boeing 702 is compatible with several orbital launch systems, including Atlas V, Ariane 5, Delta IV, Falcon 9, Proton, and Sea Launch operated Zenit 3SL.

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GEO Imaging Satellite or GISAT is a planned Indian geo-imaging satellite for providing images quickly during disasters. Two identical satellites will provide resolution in the range of 50 m to 1.5 km. It will carry multi-spectral (visible, near infra-red and thermal), multi-resolution (50m to 1.5 km) imaging instruments. Launch of the first satellite to geostationary orbit is expected in 2019.

Geosynchronous Satellite Launch Vehicle

Geosynchronous Satellite Launch Vehicle abbreviated as GSLV, is an expendable launch system operated by the Indian Space Research Organisation (ISRO). GSLV has been used in thirteen launches to date, since its first launch in 2001 to the most recent on December 19, 2018 carrying the GSAT-7A military communications satellite. Even though Geosynchronous Satellite Launch Vehicle Mark III shares the name it is an entirely different launcher.

Indian Space Research Organisation

The Indian Space Research Organisation (ISRO, ) is the space agency of the Government of India headquartered in the city of Bengaluru. Its vision is to "harness space technology for national development while pursuing space science research and planetary exploration."Indian National Committee for Space Research (INCOSPAR) was established

by Jawaharlal Nehru, the first Prime Minister of the Indian Government under the DAE in 1962, with the urging of scientist Vikram Sarabhai recognizing the need in space research. INCOSPAR grew into ISRO in 1969 also under the DAE. In 1972 Government of India setup a Space Commission and the Department of Space (DOS), bringing ISRO under the DOS. The establishment of ISRO thus institutionalized space research activities in India. It is managed by the Department of Space, which reports to the Prime Minister of India. ISRO built India's first satellite, Aryabhata, which was launched by the Soviet Union on 19 April 1975. It was named after the mathematician Aryabhata. In 1980, Rohini became the first satellite to be placed in orbit by an Indian-made launch vehicle, SLV-3. ISRO subsequently developed two other rockets: the Polar Satellite Launch Vehicle (PSLV) for launching satellites into polar orbits and the Geosynchronous Satellite Launch Vehicle (GSLV) for placing satellites into geostationary orbits. These rockets have launched numerous communications satellites and earth observation satellites. Satellite navigation systems like GAGAN and IRNSS have been deployed. In January 2014, ISRO used an indigenous cryogenic engine in a GSLV-D5 launch of the GSAT-14.ISRO sent a lunar orbiter, Chandrayaan-1, on 22 October 2008 and a Mars orbiter, Mars Orbiter Mission, on 5 November 2013, which entered Mars orbit on 24 September 2014, making India the first nation to succeed on its first attempt to Mars, and ISRO the fourth space agency in the world as well as the first space agency in Asia to reach Mars orbit. On 18 June 2016, ISRO set a record with a launch of twenty satellites in a single payload, one being a satellite from Google. On 15 February 2017, ISRO launched one hundred and four satellites in a single rocket (PSLV-C37) and created a world record. ISRO launched its heaviest rocket, Geosynchronous Satellite Launch Vehicle-Mark III (GSLV-Mk III), on 5 June 2017 and placed a communications satellite GSAT-19 in orbit. With this launch, ISRO became capable of launching 4-ton heavy satellites into GTO.

Future plans include the development of Unified Launch Vehicle, Small Satellite Launch Vehicle, development of a reusable launch vehicle, human spaceflight, controlled soft lunar landing, interplanetary probes, and a solar spacecraft mission.

Satellite

In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as Earth's Moon.

On 4 October 1957 the Soviet Union launched the world's first artificial satellite, Sputnik 1. Since then, about 8,100 satellites from more than 40 countries have been launched. According to a 2018 estimate, some 4,900 remain in orbit, of those about 1,900 were operational; while the rest have lived out their useful lives and become space debris. Approximately 500 operational satellites are in low-Earth orbit, 50 are in medium-Earth orbit (at 20,000 km), and the rest are in geostationary orbit (at 36,000 km). A few large satellites have been launched in parts and assembled in orbit. Over a dozen space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Mercury, Venus, Mars, Jupiter, Saturn, a few asteroids, a comet and the Sun. On 18 April 2019 Nepal successfully launched its own satellite with the help of NASA.

Satellites are used for many purposes. Among several other applications, they can be used to make star maps and maps of planetary surfaces, and also take pictures of planets they are launched into. Common types include military and civilian Earth observation satellites, communications satellites, navigation satellites, weather satellites, and space telescopes. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit.

A launch vehicle is a rocket that places a satellite into orbit. Usually, it lifts off from a launch pad on land. Some are launched at sea from a submarine or a mobile maritime platform, or aboard a plane (see air launch to orbit).

Satellites are usually semi-independent computer-controlled systems. Satellite subsystems attend many tasks, such as power generation, thermal control, telemetry, attitude control and orbit control.

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