Ellipso

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Ellipso was a new satellite system planned in the 1990s by the American company Ellipso, Inc. from Washington DC, which was to supply the northern hemisphere with mobile satellite communications with ten satellites . This sub-constellation should be called Borealis . Six further satellites in the so-called Concordia sub-constellation were supposed to supply the northern and southern hemispheres up to 50 ° latitude each.

As with most modern systems of satellite telephony, the satellites should not work geostationary, but rather move in the LEO and MEO (Low / Medium Earth Orbit) range. The mobile ground stations require significantly less transmission power than for communication with a geostationary satellite at an altitude of 36,000 km. In addition, the shorter radio links offer the advantage of faster data transmission. The orbit of the Borealis satellites was planned with an inclination of 116.6 ° with an apogee of 7605 km and a perigee of 633 km and a 3-hour orbital time. The Concordia satellites were supposed to move in a circular equatorial orbit at an altitude of 8050 km.

On June 29, 2000, the ITU assigned the prefixes +8812 and +8813 to Ellipso, after they had been reserved since November 1998. Previously, these area codes were reserved for the Odyssey satellite system. The network identifier assigned by the ITU on November 5, 2003 was 901-07, but this was reclaimed on June 30, 2009 and has been free again since then.

In March 2001, Ellipso entered into a cooperation with Teledesic , who were also planning a global satellite network. Ultimately, neither of the two networks was implemented after the competitors Globalstar and Iridium also failed to meet expectations.

Although the Ellipso area code +8813 went into test operation from June 2003, the area codes assigned to Ellipso were reclaimed by the ITU on June 2, 2008 and have been free again since then.

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Individual evidence

  1. ↑ ITU-T SG2 NCT: E.164 country code 881 plus two 1-digit ICs. (PDF; 96 kB) ITU, January 24, 2007, accessed on May 10, 2015 (English).
  2. ↑ Status of reserved or assigned ITU-T E.212 shared Mobile Country Codes (MCC) and associated Mobile Network Codes (MNC). ITU, March 5, 2010, accessed May 10, 2015 .
  3. ^ ICO-Teledesic Global and Ellipso Agree to Collaborate to Help Stabilize Mobile Satellite Industry. Ellipso, January 14, 2001, accessed May 10, 2015 .
  4. ↑ Ellipso (country code +881 3). (DOC; 22 kB) ITU, June 16, 2003, accessed on January 20, 2009 (English).
  5. ↑ ITU-T SG2 NCT: E.164 country code 881 plus two 1-digit ICs. (DOC; 159 kB) ITU, accessed on January 20, 2009 (English).