Turksat (satellite)

Turksat is the name of a series of Turkish communications satellites operated or projected by the Türksat A.Ş..

Satellite telecommunication is provided by the Gölbaşı Ground Station in Ankara.^[1][2]

Missions

Satellite	Launch			Status
	Date	Site	Vehicle
Türksat 1A	1994-01-24	ELA-2 Guiana Space Centre	Ariane-44LP H10+	launch failure
Türksat 1B	1994-08-10	ELA-2 Guiana Space Centre	Ariane-44LP H10+	mission ended 2006
Türksat 1C	1996-07-09	ELA-2 Guiana Space Centre	Ariane-44L H10-3	mission ended 2010
Türksat 2A	2001-01-10	ELA-2 Guiana Space Centre	Ariane-44P H10-3	mission ended 2016
Türksat 3A	2008-06-12	ELA-3 Guiana Space Centre	Ariane 5ECA	in use
Türksat 4A	2014-02-14	Baikonur Cosmodrome	Proton-M	in use
Türksat 4B	2015-10-16	Baikonur Cosmodrome	Proton-M	in use
Türksat 5A	Q4 2018	Baikonur Cosmodrome	Proton-M	in development
Türksat 5B	Q4 2019	Baikonur Cosmodrome	Proton-M	in development
Türksat 6A	2019	TBD	TBD	in development

Satellites

Türksat 1A

Turksat 1A was the first attempt of the project and launched by Ariane 4 from Centre Spatial Guyanais in Kourou, French Guiana on January 24, 1994.

Due to the failure of the launcher, the satellite exploded in the air before reaching its orbit.

Türksat 1B

After the loss of Turksat 1A, Turksat 1B was successfully located at 42°E orbit on August 11, 1994. After the orbital tests Turksat 1B was put into service on October 10, 1994.

Turksat 1B has three different coverage areas, Turkey, Central Europe and Central Asia. The satellite carries 16 transponders, 10 of 36 MHz, 6 of 72 MHz operating in K_u band (11–14 GHz). There are 4 transponder switching capability between Turkey and Central Europe, and 3 between Turkey and Central Asia.

Turksat 1B provides TV and radio broadcasting, data and telephone transmissions. On the other hand, TES (Telephony Earth Station) Project and Internet Broadcasting Systems (including 40 southeast rural area IBS) are also transmitting from Türksat 1B.

Türksat 1C

After the Turksat 1A launch failure, Aérospatiale Company started building a new satellite under the insurance terms of the turnkey system contract. Modifying the contract with Aérospatiale, Turksat 1C coverage area was enlarged by two big zones different from Turksat 1B coverage areas.

Turksat 1C was designed for covering Turkey on west spot and Europe on east spot so as to serve simultaneously between Turkey and Europe with Turkey and Central Asia and to provide direct connection between Europe and Central Asia.

Turksat 1C was successfully launched at 31.3°E position on July 10, 1996. Completing the orbital tests, this satellite shifted from longitude 31.3°E to 42°E. After this process which took 17 days, the broadcast traffic of the Turksat 1B was transferred to Turksat 1C. Finally when these processes finished Turksat 1B was shifted with similar orbital manoeuvres to 31.3°E position.

On July 16 2008, all traffic on Turksat 1C was transferred to Turksat 3A. After this date Turksat 1C was shifted at 31.3°E. It is being used in inclined orbit.

Türksat 2A

Turksat Satellite Systems continued progress regarding the need of new satellites having multiple channels, larger coverage, and backup capability like the other satellite operator satellites in the international market. To serve with a larger coverage area for resident customers and to compete with the other satellite operators in the literal sense, the new satellite would be located at the same position with Turksat 1C.

Türk Telekom set up a joint venture company with Aérospatiale (merged by Alcatel Space, then Thales Alenia Space), called EurasiaSat, which would be in charge of purchasing a new-generation satellite named Turksat 2A (also known as Eurasiasat 1). Turksat 2A started commercial service on February 1, 2001, with the same 42°E location as Turksat 1C.

Turksat 2A satellite carries a payload of 34 high-powered transponders consisting of 22 33 MHz fixed-beam transponders and 12 36 MHz transponders with two steerable beams.

Turksat 2A BSS Band fixed-beam transponders have two coverage zones like Turksat 1C:

1. West Zone covers the British Isles in the west, Scandinavian countries in the north, North Africa in the south, and Caspian Sea in the east.
2. East Zone covers the Balkan Peninsula in the west, Russian Federation in the north, Pakistan in the south, and China national boundary in the east.

Inside of the footprint such as south Asia and Republic of South Africa can be accessed over the Turksat 2A FSS Band steerable-beam transponders.

On 18 September 2014, all traffic on Turksat 2A was transferred to Turksat 4A. However, Turksat 2A will broadcast a few TV channels until its end of mission in 2016.

Türksat 3A

Turksat 3A satellite will enable Turksat to offer telecommunication services as well as direct TV broadcasting services though a broader area than its existing satellites covering Turkey, Europe, Middle East, North Africa and Central Asia. With the help of its switchable transponders, Turksat 3A will act as a bridge between Europe and Asia. Turksat 3A's Turkey coverage has been specially designed to provide very efficient gain for broadband applications like VSAT services giving customers low-cost, up-link systems.

Based on Thales Alenia Space Spacebus 4000B2, Turksat 3A is fitted with 24 Ku-band transponders and offers beginning of life power of about 8 kW. Positioned at 42°E, Turksat 3A will weight 3060 kg at launch and will replace Turksat 1C satellite.^[3]

Turksat 3A was launched by Arianespace atop an Ariane 5ECA carrier rocket, along with the British Skynet 5C satellite, in a dual-payload launch on 12 June 2008 at 22:05:02 GMT, from ELA-3 at the Guiana Space Centre.

Türksat 4A

Turksat 4A was successfully launched from the Baikonur Cosmodrome at 23:09 GMT on 14 February 2014. After three months of orbital and subsystem tests, Turksat 4A was successfully transferred from its temporary orbit at 50°E to a position at 42°E. The satellite started broadcasting on 15 July 2014.

With Turksat 4A, Turksat AS offers telecommunication and direct TV broadcasting services throughout Turkey, as well as in Europe, Central Asia, the Middle East and Africa. Turksat 4A provides Ku-band high-power direct TV broadcasting channels and both C- and Ka-band communications channels.

Türksat 4B

Turksat 4B was successfully launched from the Baikonur Cosmodrome at 20:40 GMT on 16 October 2015.^[4]

References

Bibliography

• (French) (English) Guy Lebègue, Aérospatiale, Cannes, France, (trad. Robert J. Amral), « Turksat : A Turnkey Satellite », in Revue aerospatiale, N°72, October 1990, ISSN 0994-9003.

External links