Thuraya (from Arabic. الثريا - Pleiades , pronounced Thuraya ) is a regional satellite telephone operator that operates in Europe , Central Asia , Australia and Africa . The operator also provides satellite Internet access services under the ThurayaDSL brand.
The company is registered in the United Arab Emirates and provides services through authorized suppliers. The company currently has about 250,000 subscribers ( March 2006 ). Turai’s profit in 2004 was $ 26.15 million, and in 2005, more than $ 84 million.
The system uses three satellites located in geostationary orbits . Turaiya telephone terminals differ from other satellite phones, as they can operate both in the satellite network and in the GSM-900 terrestrial networks of other operators. Thuraya entered into roaming agreements with more than 201 GSM operators (February 2006).
Services Provided
- Voice transmission to the portable Thuraya XT, Thuraya XT DUAL (Thuraya SO-2510, SG-2520, Hughes 7100/7101 (discontinued), Ascom 21 (discontinued)) or a fixed terminal;
- Using SMS ;
- Data and fax transmission at 9.6 Kbps;
- GMPRS mobile data transfer service on SO, SG and XT terminals - 60 kbit / s to the terminal and 15 kbit / s in the return channel;
- ThurayaDSL - data transfer at a speed of 144 kbps to a terminal the size of a laptop (discontinued);
- ThurayaIP - data transmission at a speed of 444 kbit / s to a terminal measuring 158 × 225 × 50 mm (format A5) and weighing 1.3 kg;
- Portable terminals have a built-in GPS- receiver;
- Additional services: news, call back, call waiting, missed calls, voicemail, WAP, etc.
- A 'high power alert' allows you to receive a call signal even if the signal strength is insufficient to receive a call (for example, indoors).
Technical Details
Turai network telephone prefix: +88216.
Used frequencies:
Channels to user terminals:
- Earth-to-space 1626.5 - 1660.5 MHz
- Space Earth 1525.0 - 1559.0 MHz
Channels to the control station:
- Earth-to-space 6425.0 - 6725.0 MHz
- Space-Earth 3400.0 - 3625.0 MHz
Currently (May 2008) there are three system satellites in orbit
Thuraya-1
- Number by satellite catalog : 26578
- International flight number : 2000-066A
- Launch date and time October 21, 2000 05:22:00 UTC
- 3200 kg without fuel
- Weight with fuel 5100 kg
- Solar power 13 kW
The antenna used for communication with the terminals is a 128-element digital antenna array [1] [2] with a diameter of 12 m. The antenna allows you to generate up to 200-300 rays to user terminals or their groups. [1] [2] [3] [4]
It was in a geostationary orbit at 44 ° East, then was transferred to the reserve at 98.5 ° East. [5] , currently (October 9, 2007) is located to the east, at the position of 122.5 ° east [6]
Thuraya-2
- Number by satellite catalog : 27825
- International flight number : 2003-026A
- Launch date and time October 6, 2003 13:56:00 UTC
- Weight with fuel 5200 kg
- Solar power 11 kW
The antenna used for communication with the terminals is a 128-element digital antenna array [1] [2] with a diameter of 12 m. The antenna allows you to generate up to 200-300 rays to user terminals or their groups. [1] [2] [7] [8]
It is located in geosynchronous orbit with an inclination of 6.3 ° at the position of 44 ° in. d. [9] [8]
Thuraya-3
- International flight number : 2008-001A
- Launch: January 15, 2008 11:48:59 UTC
- Weight: 5173 kg
- Planned Life: 12 years
- It is located in geosynchronous orbit at 98.5 ° C. d. [10] [8]
See also
- Satellite connection
- Iridium
- INMARSAT
Notes
- ↑ 1 2 3 4 Slyusar, V.I. Thuraya-1 through the prism of technical innovation. // Telemedia. - 2001. - No. 5 (9). 13 - 18. (2001).
- ↑ 1 2 3 4 Slyusar, V.I. Thuraya phased array antenna. // Networks and telecommunications. - 2002. - No. 5 (24). 54 - 58. (2002).
- ↑ Thuraya 1 spacecraft data . NSSDC . Archived February 12, 2012.
- ↑ Payload - Thuraya Satellite (inaccessible link) . Thuraya. Archived November 21, 2006.
- ↑ "Information about the state of the system" . TMSAT. Archived February 12, 2012.
- ↑ Thuraya 1 real time tracking . Archived February 12, 2012.
- ↑ Thuraya 2 spacecraft data . NSSDC. Archived February 12, 2012.
- ↑ 1 2 3 Slyusar V.I. Digital antenna arrays in mobile satellite communications. // First mile. Last mile (Supplement to the journal "Electronics: science, technology, business"). - 2008. - No. 4. - S. 10 - 15. [1]
- ↑ Thuraya 2 real time tracking . Archived February 12, 2012.
- ↑ Launch Press Release (inaccessible link) . Archived on May 9, 2008.