Astra 1KR

Astra 1KR
Name	Astra 1KR
Mission type	Communications
Operator	SES Astra
Launch date	2006-10-04
Launch vehicle	Proton-M/Briz-M
Launch site	Baikonur Cosmodrome
Orbit	Geostationary
Longitude	19.2° East
Transponders	32 Ku-band

Astra 1KR Astra 1KR is a European geostationary communications satellite deployed to provide direct-to-home broadcasting and data services across Europe. The satellite was manufactured by Astrium (later part of Airbus Defence and Space) and launched by Khrunichev using a Proton-M/Briz-M vehicle from Baikonur Cosmodrome, joining a constellation operated by SES Astra at the 19.2° East orbital slot.

Overview

Astra 1KR was ordered to expand capacity for digital television distribution and broadband services alongside satellites such as Astra 1A, Astra 1B, Astra 1C, and Astra 1D; it fits within the broader SES fleet including Astra 2A, Astra 2F, Astra 3B, and Astra 5B. The procurement involved contractors and stakeholders from the European aerospace sector including Airbus Defence and Space, Thales Alenia Space, and the French and German industrial base, while launch arrangements engaged Khrunichev State Research and Production Space Center and the Russian Federation's space infrastructure centered at Baikonur Cosmodrome. The satellite contributes to broadcasting markets linked to broadcasters such as BBC Television, RTL Group, ProSiebenSat.1 Media, TF1, and Canal+.

Satellite Design and Payload

Built on the Eurostar platform developed by Astrium, Astra 1KR carries a Ku-band payload of transponders similar to configurations used by satellites like Hot Bird 7A and Eutelsat 10A to deliver signals for customers including Sky Group, Freenet, SES Astra Services, and various direct-to-home operators. The payload architecture integrates transponder redundancy, power systems derived from solar array designs employed by Eurostar E3000 platforms, and propulsion elements comparable to chemical apogee motors used by IHI Corporation designs and station-keeping thrusters akin to those on Intelsat spacecraft. Thermal control, telemetry, tracking and command systems reflect standards set by agencies and firms such as European Space Agency, CNES, DLR, and industrial partners like Snecma.

Launch and Orbit

Astra 1KR launched on 4 October 2006 aboard a Proton-M with Briz-M upper stage, a vehicle developed by Khrunichev State Research and Production Space Center and historically used for missions involving Inmarsat and Eutelsat payloads. The flight departed from Baikonur Cosmodrome in Kazakhstan, a site associated with missions including Sputnik 1 and Soyuz TMA-1, and performed a series of burns to place the satellite into a geostationary transfer orbit followed by maneuvers to achieve an operational geostationary slot at 19.2° East near satellites such as Astra 1KR's cohort (other Astra craft) and neighboring assets like Eutelsat 28A and SES-5. Ground control coordination involved SES operations centers and international frequency coordination under frameworks related to the International Telecommunication Union.

Operations and Capacity

Operated by SES Astra and integrated into service networks used by broadcasters including BBC, ZDF, ARD, RTL Group, and Sky UK, the satellite provided dozens of Ku-band transponders to carry digital television, radio, and data multicast services. Capacity allocation and commercial agreements connected to multichannel operators such as Astra Digital Radio, CanalSat, Freesat, and satellite distribution partners like SES Video and SES Networks shaped transponder usage, while regulatory aspects interfaced with national authorities including Bundesnetzagentur and Agence nationale des fréquences. The satellite supported distribution workflows similar to those used by platforms like DVB-S2, MPEG-4, and content providers including BBC iPlayer distribution partners.

Ownership and Corporate Context

Astra 1KR was owned and operated by SES Astra, a division of SES S.A., a company headquartered in Luxembourg with corporate links to entities such as Luxembourg Stock Exchange listings and industry consortia including European Broadcasting Union. SES's business strategy involved fleet management comparable to operators Intelsat, Eutelsat, Telesat, and Hisdesat, and commercial arrangements with broadcasters, satellite operators, and distributors like Astra International Services. Corporate governance, shareholder relations, and capital procurement reflected engagement with financial institutions such as Deutsche Bank and Credit Suisse as well as regulatory oversight from EU institutions in Brussels.

Incidents and Anomalies

During its operational life, Astra 1KR experienced technical issues and mission adjustments that required coordination with SES engineering teams, insurance underwriters including firms in Lloyd's of London, and space situational awareness entities like United States Space Surveillance Network and parties involved with Space Debris monitoring. Anomalies in satellite platforms historically prompt responses involving manufacturers such as Airbus Defence and Space, insurers, and orbital coordination with neighboring operators including Eutelsat and Telesat to mitigate interference and ensure continuity for broadcasters like Sky Deutschland and Canal Digital. Specific incidents prompted reassignment of traffic to other SES assets including Astra 1N and Astra 2F to maintain service levels.

Category:Communications satellites Category:SES satellites Category:Spacecraft launched in 2006