Consider the question. Five satellites have been launched by the Nigerian government into outer space. Early plans to launch a national satellite in 1976 were not executed. The NigeriaSat-1 was the first Nigerian satellite and built by a United Kingdom-based satellite technology company, Surrey Space Technology Limited (SSTL ltd) under the Nigerian government sponsorship for $30 million. The satellite was launched by Kosmos-3M rocket from Russian Plesetsk spaceport on 27 September 2003. Nigeriasat-1 was part of the world-wide Disaster Monitoring Constellation System. The primary objectives of the Nigeriasat-1 were: to give early warning signals of environmental disaster; to help detect and control desertification in the northern part of Nigeria; to assist in demographic planning; to establish the relationship between vectors and the environment that breeds malaria and to give early warning signals on future outbreaks of meningitis using remote sensing technology; to provide the technology needed to bring education to all parts of the country through distant learning; and to aid in conflict resolution and border disputes by mapping out state and International borders.

When did nigeria launched its first satellite nigeriasat-1?
If the answer is '27 September 2003'; explain the reasoning:
The relevant information to answer the above question is: The satellite was launched by Kosmos-3M rocket from Russian Plesetsk spaceport on 27 September 2003.