NigeriaSat-2

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NigeriaSat-2
Type: Earth observation satellite
Country: NigeriaNigeria Nigeria
Operator: NASRDA
COSPAR-ID : 2011-044B
Mission dates
Dimensions: 286 kg
Begin: 17th August 2011
Starting place: Jasny Cosmodrome
Launcher: Dnepr
Orbit data
Track height: 700 km (sun synchronous)
Orbit inclination : 98 °

NigeriaSat-2 is an earth observation satellite operated by the Nigerian space agency NASRDA .

It was launched on August 17, 2011 with a Dnepr conversion rocket together with the satellites Sich-2 , NigeriaSat-X , RASAT and EduSAT from the Jasny Cosmodrome .

tasks

NigeriaSat-2 is part of the transnational satellite program African Resource Management (ARM), which is currently being developed, proposed by South Africa and supported by Nigeria, Algeria and Kenya as well as other interested countries in Africa . The aim of this satellite constellation is to give African countries real-time access to unrestricted and inexpensive satellite observation data, which should enable effective resource and environmental management in Africa. The participating countries work together on costs, knowledge and infrastructure. The Nigerian President Olusegun Obasanjo played a key role in this ; after his election in 1999 , he wanted to ensure the protection and monitoring of the country's oil facilities in the ongoing political and ethnic unrest in the Niger Delta region, as violence, kidnappings, sabotage and confiscation were increasing of oil plants piled. In an effort to stop the vandalism , the Nigerian government ordered satellite technology from the United States to monitor it.

Nigeriasat-2 is also part of the Disaster Monitoring Constellation (DMC).

Procurement

On October 10, 2006, the British satellite specialist Surrey Satellite Technology Ltd (SSTL) signed a contract in Abuja for the development of NigeriaSat-2, which represents a major step in Nigeria's space program after the NigeriaSat-1 earth observation microsatellite also supplied by SSTL . The selection of SSTL by the National Space Research and Development Agency (NASRDA) of Nigeria followed a detailed technical assessment by Telesat Canada, NASRDA's technical advisor. The 300 kg satellite will provide Nigeria with geographically referenced high resolution satellite images for cartography, water resource management, agricultural use, population estimation and disaster risk management. It is based on the new SSTL-300i satellite bus from SSTL, which is intended to form the basis for inexpensive yet high-resolution small earth observation satellites and uses technologies that were developed for the TOPSAT and Beijing-1 missions .

construction

The payload consists of various cameras with a resolution of 2.5 m (panchromatic), 5 m in four spectral ranges and 32 m in four other spectral ranges. The swath width is 20 × 20 km (2.5 and 5.0 m) and 300 × 300 km (32 m). The resolution of 32 m ensures compatibility with the images from NigeriaSat-1, while the high resolution of 2.5 m and 5 m is used for new applications. Since the cameras work as line scanners, the construction was designed in such a way that theoretically images are created with the swath width, the length of which is only limited by the storage capacity of the satellite. In addition, several recordings can be combined in the satellite to form images with an even larger swath width, or a stereo recording can be made by recording several images while flying over the area at the same time. The satellite can be tilted up to 45 ° to the orbit. Depending on the resolution, the following uses are intended for the images:

  • Cartography (2.5 m panchromatic)
  • Oil spills: detection, extent and location (2.5 m or 5 m)
  • Land use changes in rural / urban areas (5 m)
  • Hydrology (irrigation, project monitoring)
  • Agriculture and forest monitoring
  • Security monitoring (2.5 m panchromatic)
  • Road and rail expansion and maintenance
  • Pipeline monitoring
  • Proof of illegal mining, fire, etc.

The images are transmitted to earth via two downlinks of 105 Mbps, which can also be switched to a 210 Mbps single-channel connection.

Web links

Individual evidence

  1. ↑ CEOS EO Handbook - Mission Summary - NigeriaSat-2 (English)
  2. ^ William Graham: Dnepr launches with Ukraine's Sich-2 and several passengers | NASASpaceFlight.com , August 17, 2011, accessed August 24, 2011
  3. ↑ a b Highly Advanced NigeriaSat-2 Small Satellite Launch Date Announced. Spacedaily, May 12, 2010, accessed February 9, 2011 .
  4. ↑ GlobalSecurity: NigeriaSat-2 (English)