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#### The alpha of the OmegA: Orbital ATK's new rocket gains name - SpaceFlight Insider

Dulles, Virginia-based Orbital ATK has announced the name of the company's new, large-class rocket: OmegA. This new launch vehicle is meant for the U.S. Air Force's Evolved Expendable Launch Vehicle (EELV) program. OmegA is designed to have the ...

#### India launches back-up navigation satellite - Air & Cosmos - International

After a flight lasting about 19 minutes, the vehicle achieved a Sub-Geosynchronous Transfer Orbit with a perigee of 281.5km and an apogee of 20,730km inclined at an angle of 19.2° to the equator. Orbit manoeuvres are being performed from ISRO's Master ...

#### Ariane 5 lofts two long-awaited telecom satellites - SpaceNews

WASHINGTON — Arianespace on April 5 launched two satellites for telecom operators that for separate reasons were both more than a year behind their original launch schedules. An Ariane 5 rocket took off at 5:34 p.m. Eastern from the European spaceport ...

#### European Rocket Lofts Communications Satellites in 1st Launch Since Glitch - Space.com

An Ariane 5 rocket lifted off from the Guiana Space Center in French Guiana today at 5:34 p.m. EDT (2134 GMT), successfully delivering the DSN-1/Superbird-8 and HYLAS 4 satellites to geostationary transfer orbit high above Earth. The targeted transfer ...

#### Indian comms satellite gives boffins back home the silent treatment - The Register

The India Space Research Organisation (ISRO) has lost contact with GSAT-6A during a second firing of thrusters to nudge the 2,000kg telecommunications satellite towards an operational orbit. The launch went well, with the Geosynchronous Satellite ...

#### ISRO loses contact with GSAT-6A satellite - Business Line

The second orbit raising operation was successfully carried out by LAM Engine firing for about 53 minutes on March 31 morning. “Efforts are underway to establish the link with the satellite,” the space agency said. It will be a major setback for the ...

#### India Successfully Launches GSAT-6A Communication Satellite - India West

SRIHARIKOTA — Using its heavy rocket Geosynchronous Satellite Launch Vehicle – the GSLV-F08 – India, in a copy book style, March 29 successfully launched the GSAT-6A satellite, which will be used to provide mobile communication facilities. The GSLV ...

#### ISRO places GSAT-6A in orbit to boost mobile communication, help Armed forces - Business Today

The GSAT-6A will provide a leg-up to mobile communication in India through multi-beam coverage facility. The GSAT-6A would also provide communication services to Indian Armed forces, a report by Times of India said while quoting Isro sources. The ...

#### GSLV injects communication satellite GSAT-6A into orbit - The Hindu

The Indian Space Research Organisation (ISRO) successfully placed a communication satellite GSAT-6A in a geosynchronous transfer orbit. It was carried on board the GSLV F-08 from the Satish Dhawan Space Centre here on Thursday. The GSAT-6A is a ...

#### Firing It Up at Both Ends? New Launch Vehicles Extend Mass Range - Satellite Today

In an industry rapidly evolving into a new commercial paradigm, characterized by Non-Geostationary Orbit (NGSO) constellations, plummeting prices, venture capital investment, and novel applications, how significant are these advances in the broader ...

#### Photos: SpaceX Hispasat Night Launch - Newsweek

SpaceX conducted its 50th launch of the Falcon 9 rocket last week with the launch of the Hispasat communication satellite. The Hispasat 30W-6 satellite was successfully sent to space, where it was set to end up in geostationary transfer orbit to ...

#### Video: SpaceX's 50th Falcon 9 rocket flight lifts off from Cape Canaveral - Spaceflight Now

Credit: SpaceX. A SpaceX Falcon 9 rocket launched shortly after midnight Tuesday from Cape Canaveral Air Force Station with Hispasat 30W-6, a communications satellite heading for a position more than 22,000 miles over the equator to serve markets in ...

#### SpaceX completes its 50th Falcon 9 launch - New Atlas

SpaceX has completed the 50th launch of its Falcon 9 rocket, with the successful insertion of the Hispasat 30W-6 communications satellite into a geostationary transfer orbit. Sadly, unfavorable weather conditions prevented the drone ship Of Course I ...

#### SpaceX tests extra-fast ocean landing, celebrates 50th launch - Teslarati

SpaceX has successfully completed the 50th launch of Falcon 9 a bit less than eight years after its 2010 debut, and has done so in a fashion that almost perfectly captures the veritable tsunamis the company has begun to make throughout the global ...

#### SpaceX launches 50th Falcon 9, orbits bus-sized Hispasat 30W-6 - SpaceFlight Insider

CAPE CANAVERAL, Fla. — In the early-morning hours of March 6, 2018, SpaceX launched its 50th Falcon 9 rocket since it debuted in 2010. This flight saw the delivery of the Spanish Hispasat 30W-6 communications satellite into a geostationary transfer ...

#### SpaceX launches 50th Falcon 9 rocket - L.A. Biz

The company has ambitious plans for a constellation of thousands of satellites to provide global broadband internet service. Since the program's launch in 2010, the Falcon 9 has become SpaceX's workhorse rocket while the company builds bigger, more ...

#### SpaceX's 50th Falcon 9 launch carried its largest payload – a satellite the size of a bus to orbit - International Business Times, India Edition

The 30W-6, will remain in geostationary orbit, which means it will follow the direction of Earth's rotation. It will take one day to complete an orbit, and according to a report put out by SpaceX, "Hispasat 30W-6 (previously Hispasat 1F) will be ...

#### SpaceX launch: Moment Elon Musk's fires his largest satellite ever, which is 'the size of a bus' - Evening Standard

... in June 2010. It took off from Cape Canaveral Air Force Station, Florida, at 12.33am EST (5.33am GMT) on Tuesday carrying a 30W-6 satellite made by Spanish firm Hispasat. About half an hour later, the rocket deployed the satellite into an orbit 22 ...

#### SpaceX's Falcon 9 rocket launched, carrying 6-ton satellite from Spain - Xinhua

WASHINGTON, March 6 (Xinhua) -- U.S. space technology company SpaceX launched a Falcon 9 rocket in the wee hours of Tuesday morning local time, carrying a telecommunication satellite to the geostationary transfer orbit. The rocket lifted off at 00:33 ...

#### SpaceX launches Hispasat satellite, completes 50th Falcon 9 mission - SpaceNews

A SpaceX Falcon 9 carried the Hispasat 30W-6 satellite to geostationary transfer orbit the morning of March 6. Credit: SpaceX. WASHINGTON — SpaceX launched its 50th Falcon 9 rocket on March 6, carrying a large telecom satellite for Spanish fleet ...

A geosynchronous transfer orbit or geostationary transfer orbit is a Hohmann transfer orbit used to reach geosynchronous or geostationary orbit using high thrust chemical engines. It is a highly elliptical Earth orbit with an apogee of 42,164 km , or 35,786 km above sea level, which corresponds to the geostationary altitude. The period of a standard geosynchronous transfer orbit is about 10.5 hours. The argument of perigee is such that apogee occurs on or near the equator. Perigee can be anywhere above the atmosphere, but is usually restricted to a few hundred kilometers above the Earth's surface to reduce launcher delta-V requirements and to limit the orbital lifetime of the spent booster so as to curtail space junk. If using low-thrust engines such as electrical propulsion to get from the transfer orbit to geostationary orbit, the transfer orbit can be supersynchronous . This method however takes much longer to achieve due to the low thrust injected into the orbit. The typical launch vehicle injects the satellite to a supersynchronous orbit having the apogee above 42,164 km. The satellite's low thrust engines are thrusted continuously around the geostationary transfer orbits in an inertial direction. This inertial direction is set to be in the velocity vector at apogee but with an outer plane direction. The outer plane direction removes the initial inclination set by the initial transfer orbit while the inner plane direction raises simultaneously the perigee and lowers the apogee of the intermediate geostationary transfer orbit. In case of using the Hohmann transfer orbit, only a few days are required to reach the geosynchronous orbit. By using low thrust engines or electrical propulsion, months are required until the satellite reaches its final orbit.

A geosynchronous transfer orbit or geostationary transfer orbit (GTO) is a Hohmann transfer orbit used to reach geosynchronous or geostationary orbit using high thrust chemical engines. It is a highly elliptical Earth orbit with an apogee of 42,164 km (26,199 mi), or 35,786 km (22,236 mi) above sea level, which corresponds to the geostationary (GEO) altitude. The period of a standard geosynchronous transfer orbit is about 10.5 hours. The argument of perigee is such that apogee occurs on or near the equator. Perigee can be anywhere above the atmosphere, but is usually restricted to a few hundred kilometers above the Earth's surface to reduce launcher delta-V (${\displaystyle \Delta }$V) requirements and to limit the orbital lifetime of the spent booster so as to curtail space junk. If using low-thrust engines such as electrical propulsion to get from the transfer orbit to geostationary orbit, the transfer orbit can be supersynchronous (having an apogee above the final geosynchronous orbit). This method however takes much longer to achieve due to the low thrust injected into the orbit. The typical launch vehicle injects the satellite to a supersynchronous orbit having the apogee above 42,164 km. The satellite's low thrust engines are thrusted continuously around the geostationary transfer orbits in an inertial direction. This inertial direction is set to be in the velocity vector at apogee but with an outer plane direction. The outer plane direction removes the initial inclination set by the initial transfer orbit while the inner plane direction raises simultaneously the perigee and lowers the apogee of the intermediate geostationary transfer orbit. In case of using the Hohmann transfer orbit, only a few days are required to reach the geosynchronous orbit. By using low thrust engines or electrical propulsion, months are required until the satellite reaches its final orbit.

The inclination of a GTO is the angle between the orbit plane and the Earth's equatorial plane. It is determined by the latitude of the launch site and the launch azimuth (direction). The inclination and eccentricity must both be reduced to zero to obtain a geostationary orbit. If only the eccentricity of the orbit is reduced to zero, the result may be a geosynchronous orbit but will not be geostationary. Because the ${\displaystyle \Delta }$V required for a plane change is proportional to the instantaneous velocity, the inclination and eccentricity are usually changed together in a single manoeuvre at apogee where velocity is lowest.