ALSAT-1 maps forest fires

Thursday, November 29. 2007
In the news

Algeria is celebrating the 5th birthday of its first satellite, ALSAT-1 this week.

Last summer, a heatwave struck Algeria bringing with it temperatures of up to 50 degrees Celsuis. This dryed out the North African landscape, leading to forest fires in several forests.

The Batna region, which has some of the most densely forested regions in Algeria, was one of the worst affected areas. In particular, places like Djebel Belezma and Beni Fedhla were stricken by severe conflagrations accented by sirocco winds blowing at more than 80 kph.

Fire damage in the Bliza area


The fire has destroyed a significant part of the forests in the Batna region. For example, only this summer, fires have destroyed over 8000 hectares in Djebel Kimmel and in the area of Arris.

Forest fires: astronomical figures



Algeria used the SSTL-built ALSAT-1 satellite in a study to monitor forest fires and evaluate the damage caused and assess the forests’ ability to regenerate.

Fire damage surrounding Tipaza


The location referenced (geospatial) images from Algeria’s own satellite were supplemented where required with additional Disaster Monitoring Constellation (DMC) data where required.

How satellite imaging is applied
The images were acquired from areas of interest are first pre-processed using the ENVI image processing software, these are then analysed and finely processed for later use. This results in cartographical (maps) that are easy to read with the human eye. The maps are then used to identify the various forest formations and the impact that this summer’s (2007) fires have had on them.
Both supervised classification and the vegetation index (NDVI) methods were used to determine the different forest formations and to deduct the fire impact on them. This methodology has allowed the Centre National des Techniques Spatiales (CNTS) to accurately assess the destruction of forest fires in the north of Algeria during this year’s (2007) campaign.

Posted by Robin Wolstenholme in In the news, Space at 15:25 | Comments (0) | Trackbacks (0)
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SSTL clock-up twin success in-orbit

Tuesday, November 20. 2007

Two high performance mircosatellites built by SSTL have entered their third year of in-orbit operations after delivering consistently outstanding results since their launch in October 2005.

Both satellites were designed and built by SSTL as Earth observation missions: Beijing-1 for China’s Beijing Landview Mapping Information Technology Ltd (BLMIT), and TopSat for British company QinetiQ on behalf of the UK Government.

TopSat
These two missions represented a significant development in capability and performance of small satellites, providing 2.5m resolution imagery onboard TopSat, and 4m for Beijing-1. The high performance cameras were designed and built in the UK by Rutherford Appleton Laboratory (RAL) and Sira Optronics respectively. Both satellites are built with highly agile attitude control systems that provide accurate pointing to enable several independent images to be targeted in rapid succession.

Beijing-1 was launched into the Disaster Monitoring Constellation (DMC), joining four other SSTL-built satellites for a multi-national consortium of owners. As well as contributing images to the DMC, the Chinese satellite is providing pollution and topography data to the Chinese government, much of which has been targeted at reducing pollutants in time for the 2008 Olympic Games to be hosted in the capital.

TopSat's primary mission objective was to demonstrate that a microsatellite could deliver responsive high-resolution imagery directly from a satellite to ground terminals within the same footprint. Having fulfilled its original objectives, the satellite is now available for commercial service under the TopSat Consortium: QinetiQ (who own the satellite), SSTL, RAL and Infoterra, all original partners in the mission.

Today, both satellites today share a common role in Low Earth Orbit, providing images for the International Charter: Space and Major Disasters, which is currently lead by SSTL’s subsidiary DMCii Ltd on behalf of the British National Space Centre (BNSC).

Just two years on, SSTL is developing the next generation DMC satellite for launch in 2009. The SSTL 300 platform will give users access to ever more demanding applications, including 10-metre PAN and 4-metre multi-spectral imaging and a throughput of more than 100 images per day.

Sira now forms SSTL’s Optical Payload Group, a 30-man team based at the company’s site in Sevenoaks UK, developing cutting-edge optics systems for space.

The DMC provide a unique Earth Observation resource that enables repeat daily imaging of anywhere in the world. Satellite owners contribute images, agreeing to provide 5% of their capacity free for daily imaging of disaster areas, whilst the majority of their capacity is available to support their independent imaging programs. This makes DMC membership particularly attractive to developing nations wishing to extend their reach without the prohibitive cost associated with larger satellites and “going it alone”.

DMCii Ltd coordinates the distribution and processing of the satellite image data.

Posted by Robin Wolstenholme in TopSat at 10:00 | Comments (0) | Trackbacks (0)
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Satellites help reduce Amazon deforestation

Monday, October 29. 2007
Business

The Brazilian National Institute for Space Research (better know as INPE) has placed a contract for a third year with DMC International Imaging Ltd to acquire high-resolution satellite images of the entire 5 million square kilometres of the Amazon rainforest. Since 2004 INPE’s programme to monitor deforestation has dramatically reduced the rate of logging from 27,000 sq.km. per year to about 10,000 sq.km. in 2007.

Amazon deforestation
In order to rapidly identify areas of cover change, DMCii is contracted to provide three repeat coverages in 2007 (June-July, July-August, September-October). In 2005, and again in 2006, DMC imaged the whole Amazon Basin in 6 weeks to provide Brazil with vital information to help monitor deforestation and combat illegal logging.

DMC imagery is provided by the five-satellite international Disaster Monitoring Constellation (DMC). The DMC small satellites, built by Surrey Satellite Technology Ltd (SSTL), use wide area cameras to capture the high-resolution images. The latest satellite, built for China, was launched into the DMC on 27 October 2005. Two new DMC satellites will be launched in 2008 and a third in 2009.

Speaking at the Royal Society in London, 25th October, Dr. Gilberto Camâra, Director General of INPE said,
“The DMC data is an important affordable contribution to our assessment of deforestation of the Amazon rainforest. The constellation is able to rapidly acquire and deliver high quality imagery so that we have up-to-date information to focus our efforts. It is our intention to develop a long term relationship with DMC”


The increasing amount of DMC imagery required by INPE since 2005 demonstrates the value of rapid revisit imaging. When the new DMC satellites launch in 2008, these will add considerably to INPE’s ability to monitor and combat changes in the rainforest and their consequences for both the local people and the global climate.

The Brazilian National Institute for Space Research (INPE) help Brazilian society to benefit from new developments in space science and technology. This includes increasing Brazil's autonomy in a number of strategic areas, providing the means for Brazilian industry to participate and become competitive in the space area and encouraging the development and dissemination of space technology.

INPE has developed a near or almost real time monitoring application for deforestation detection known as the Real Time Deforestation Monitoring System (DETER) system. High-resolution imagery is needed when estimating the total area of deforestation and when identifying small clearings.

When it's not coordinating the response to natural disasters, DMC International Imaging Ltd (DMCii) supplies remote sensing data products and services for international Earth Observation (EO) markets. DMCii supplies programmed and archived optical satellite imagery provided by the multi-satellite Disaster Monitoring Constellation (DMC). DMC data is now used in a wide variety of commercial and government applications including agriculture, forestry and environmental mapping.

Posted by Robin Wolstenholme in Business, Cooperation at 12:08 | Comments (0) | Trackbacks (0)
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Satellites help save lives

Monday, October 22. 2007

The UK is taking charge of an international group providing satellite data to support disaster relief across the world. The British National Space Centre and DMC International Imaging Ltd (DMCii) will lead the International Charter “Space and Major Disasters” from October 2007 until April 2008.

The Charter was set up in 2000 to provide satellite data and imagery to help governments and aid agencies plan emergency relief following major disasters. It has provided valuable information to relief agencies after earthquakes, floods, landslides and volcanic eruptions.

Dave Hodgson
When the Charter is activated, Earth observation satellites operated by 14 international organisations are made freely available. The satellites provide data which is then used to produce maps and other information for emergency response efforts.

The UK-built Disaster Monitoring Constellation (DMC) is a key member of the Charter. The five satellites were built by Surrey Satellite Technology Ltd and are owned individually by Algeria, China, Nigeria, Turkey and the UK.

DMCii will chair the Charter Secretariat. DMCii Managing Director David Hodgson said: “Imagery from the DMC has been provided for more than 50 disasters and is particularly valuable in monitoring fires and floods.

“DMCii is also proud to provide regular emergency on-call services to the Charter and to task the world’s Earth observing satellites in response to disasters.”

Minister for Science and Innovation Ian Pearson said: “The UK is proud to lead this important group. We often think of space as being somewhere to explore, but it can also bring enormous benefits to us here on Earth."

Disaster Monitoring is one of the more direct forms of benefit from space, making it easier for the public to comprehend. The Charter is frequently called into action, or in Charter terms "activated". Charter members have been called on 34 times so far this year including on 14 September after floods devastated 12 countries in West Africa. The Charter was also activated in the aftermath of Hurricane Felix which hit Nicaragua and Honduras on 4 September 2007. The UK has activated the Charter twice this summer following the floods in north and south west England. Satellite data and images were used to produce maps of the flooded areas to help the Environment Agency assess the full extent of the damage.

Posted by Robin Wolstenholme in Cooperation, Space at 09:47 | Comments (0) | Trackbacks (0)
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