Earth Observation Constellations
Small satellite constellations are financially viable, enable rapid revisit imaging and provide flexibility for replenishing space assets for data continuity.
The Disaster Monitoring Constellation
SSTL conceived the innovative and unique Disaster Monitoring Constellation (DMC), the first Earth observation constellation of low cost small satellites providing daily images for applications including global disaster monitoring.
The Disaster Monitoring Constellation provides:
- Daily revisit
- Multispectral imagery (Landsat-ETM 2, 3 & 4)
- Wide swath (600km+)
- 32m & 22m GSD resolution
- 4m PAN & 2.5m PAN
Seven satellites currently comprise The Disaster Monitoring Constellation, each with individual ownership but working collaboratively for disaster response:
Beijing-1
NigeriaSat-1
UK-DMC-1
UK-DMC-2
Want to know more?
The Disaster Monitoring Constellation - history and background
The Disaster Monitoring Constellation - vision for the next decade
DMC3 Constellation
SSTL is currently manufacturing three SSTL-300S1 satellite platforms for DMCii. The three satellites are due for launch in 2014 and will form a new constellation, DMC3, with daily revisit times which is crucial for change detection, disaster monitoring and response planning, and essential for acquiring cloud-free imagery. Beijing-based company, 21AT, will lease 100% of the imaging capacity of the three satellites.

RapidEye Constellation
SSTL has also supplied the platforms for the 5-satellite RapidEye constellation which launched in 2008. RapidEye is a commercial small satellite mission developed by MacDonald Dettwiler & Associates (MDA). This unique system enables unprecedented global monitoring of the Earth’s surface. The mission provides rapid delivery of land information products and services to the agricultural industry for crop monitoring and mapping, yield predictions and natural disaster assessment.
The constellation provides:
- Daily revisit
- Multispectral imagery
- 6.5m GSD resolution
Visit the RapidEye AG website to find out more about the constellation.