APT Satellite Company Ltd.
General Dynamics Network Systems
R.R. Satellite Communications Ltd.

Technical

http://www.itu.int/
The International Telecommunications Union, a Specialised Agency of the United Nations, responsible for the regulation and registration of satellite network orbital positions and related spectrum

http://www.nasa.gov/
The National Aeronautical and Space Administration of the US Government

http://www.satcomonline.com/
A satellite communications engineering resource

http://www.tbs-satellite.com/tse/online/
The Satellite Encyclopaedia

http://www.sat-index.com
A daily bulletin of satellite news

http://www.jpl.nasa.gov/basics/
A 101 basic course on satellites and space communications

http://www.satellite-pool.com/
Links to resources on satellite & cable TV products & services

http://www.rpctelecom.com/
RPC Telecommunications are a UK-based satellite engineering consultancy and provide technical support services to Tongasat

Other

Government of Tonga
The Government of Tonga web site at http://www.pmo.gov.to covers a lot of information about the Government, Constitution, Ministries, Overseas Diplomatic Missions, News, History, Economy, Climate, Population, Language and much more.

The Tonga Visitors Bureau
If you want to visit the Kingdom of Tonga then the Visitors Bureau at http://www.vacations.tvb.gov.to/ is a good place to start.

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