DMC-2 Constellation
Figure 1 - Illustation of Deimos-1 spacecraft (image credit: Deimos Imaging)
About the mission/sensor
The Second Generation of the Disaster Monitoring Constellation (DMC) is an international joint effort from space agencies and space industry. This Earth Observation constellation comprises multiple microsatellite satellite equipped with different optical sensor.
The Surrey Linear Imager Multispectral 6 channels (SLIM-6-22) multispectral camera, on board of both the UK-DMC-2 and the Deimos-1 microsatellites, provides wide-swath images at 22 meter GSD under Red, Green and NIR channels. Also the Algeria Satellite-1B (AlSat-1B) microsatellite of the Algerian Space Agency (ASAL) is part of the DMC constellation but carries a different sensor, the Algerian Imager Telescope (ALITE), which is a medium-resolution, panchromatic, and multispectral sensor. This sensor, designed from ALSAT and SSTL, is able to acquire images with different GSD, 12 meter for panchromatic and 24 meter for multispectral (blue, green, red, and NIR) bands.
Example
Below are given examples of STAC item metadata and assets for a sample UK-DMC-2 product acquired for the Charter.
Item metadata
| Metadata | |
| platform | uk-dmc-2 |
| constellation | dmc-2 |
| mission | uk-dmc-2 |
| instruments | slim-6-22 |
| Date/Time | |
| start datetime | 2019-12-24T11:48:14Z |
| end datetime | 2019-12-24T11:49:04Z |
| Projection | |
| epsg | 16121 |
| View | |
| azimuth | 0.0 |
| sun azimuth | 109.8601882114 |
| sun elevation | 28.74072894832 |
| incidence angle | 14.1253288181 |
Assets
| Band NIR | |
| name | NIR |
| common name | nir |
| center wavelength | 0.0 |
| description | NIR radiance in W/m2/sr/m-6 |
| scale | 0.8014434197193457 |
| offset | 9.843282527378852 |
| Band Red | |
| name | Red |
| common name | red |
| center wavelength | 0.0 |
| description | Red radiance in W/m2/sr/m-6 |
| scale | 0.6848434480074131 |
| offset | 8.130843703135659 |
| Band Green | |
| name | Green |
| common name | green |
| center wavelength | 0.0 |
| description | Green radiance in W/m2/sr/m-6 |
| scale | 0.6453470168858088 |
| offset | 14.671118669878258 |
References
[RD01] - DMC Data Product Manual Version 2, DMCII Ltd., Issue 02, Date of issue: 12.02.2010
[RD02] - DMC Data Product Manual, DMCII Ltd., Date of issue: 27.06.2008
Reference Websites
[RW01] - Surrey Ltd. DMC 2G constellation website
[RW02] - ALSAT-1B ASAL official website
[RW03] - DMC International Imaging Ltd. official website
[RW04] - Airbus DMC constellation website