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Marine and coastal remote sensing Algeria national capabilities The ALSAT microsatellite programme.

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Presentation on theme: "Marine and coastal remote sensing Algeria national capabilities The ALSAT microsatellite programme."— Presentation transcript:

1 Marine and coastal remote sensing Algeria national capabilities The ALSAT microsatellite programme

2 Remote sensing are becoming a cost-effective techniques  Computer technology,  Information networks,  improvements in sensing systems for satellites.

3 Satellite imagery can used for observing marine features such as:  large-scale circulation, currents,  river outflow and water quality. This can be visualized by highlighting variations in water color and/or temperature.

4 These observations can be used for activities such as  environmental monitoring of sensitive coastal zones,  hazards assessment, and  management of fishing fleets.

5 Small satellites are enabling developing countries to acces space technology  AlSat-1 (Algerian Satellite), an enhanced microsatellite is Algeria's first national satellite.  It has been designed and constructed by SSTL (Surrey Space Technology Laboratory) at the Surrey Space Centre (UK).  ALSAT-1 is part of an international collaboration of Earth observation satellites specifically designed for disaster monitoring, called Disaster Monitoring Constellation – DMC-.

6 ALSAT-1 CARACTERISTICS Earth observation Microsatellite Size:60 x 60 x 60 cm Mass:90 kg Lifetime: 5 years Launch Date :28 Novembre 2002 (Plesetsk Cosmodrome, Russia) Orbit:680 km (sun-synchronous) Inclination:98.1° Time :9h30 Operated by: CNTS (Centre National des Techniques spatiales)

7 AlSat-1

8  Spectral Bands Green (0, 523 – 0, 605 µm) Red (0, 629 – 0,690 µm) Near Infrared (0, 774 – 0, 900 µm) Number of Pixels:10200/camera Resolution:32m Image size:600 x 560 km ( km²) Observation: Only 3 images to observe 1500km Algerian coast

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10 Trichromie d’Images brutes Alsat-1 prises le 15 juillet 2003 à 9h 27’

11 Trace apparente de 8 Km de long Image traitée Alsat-1 du 18 Août 2003 à 9h 37’

12 Détection de la pollution au niveau du port Arzew El Djedid Image Alsat-1 de Février 2004

13 Détection des rejets Image Alsat-1 du 09 Août 2004

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15 Image Alsat-1 du 06 Août 2004

16 O. Seybouse O. Mafragh

17 Pollution au niveau de l’embouchure de l’oued el Harrach Image ALSAT-1 du 10 mars 2003 de la baie d’Alger

18 La circulation dans la Baie d’Arzew Image ALSAT-1 du 01/03/2003 ALSAT-1 25 CN 55 CN

19 Image ALSAT-1 du 26/08/2003 ALSAT-1 25 CN 55 CN

20 Image ALSAT-1 du 31/08/2003 ALSAT-1 25 CN 55 CN

21 Image ALSAT-1 du 21/09/ CN 55 CN

22 Image ALSAT-1 du 30/11/ CN 55 CN

23 Image ALSAT-1 du 13/12/2003 ALSAT-1 25 CN 55 CN

24 Circulation générale du 26/08/03 au 13/12/03 Arzew

25 Conclusion  Alsat-1 products are free of charge for the marine science community and to the end users  Alsat-1 products along with products of other satellites of the DMC will be used as part of the national marine information database.  marine science community is actively participating in the calibration of Alsat-2 senors


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