From their advantages of non-intrusive observation, uniformity, rapid measurements and data continuity, satellite Earth observation allows for the collection of data, without compromising national sovereignty, over sites that cannot be accessed by other means. Their uniformity also allows for the same sensor to be used in different places in the world, thus helping to ensure that the data collected are comparable as it is generated by the same instrument. Moreover, rapid measurement capacity allows sensors to be targeted in relatively short order at any point on Earth, including remote and hostile areas, while continuity with single sensors or a series of sensors provides long-time series that can be collected over the lifetime of the spacecraft. Such continuity is particularly important for climate studies. These advantages allow for satellitederived Earth-observation data, products and tools to offer key information to aid effective decision-making across a diverse range of fields, including agriculture, irrigation, water resources management, forest and wildlife management, environment and climate change, health, coastal and maritime environment management, transport and logistics, disaster management and safety and security.
We do not inherit the Earth from our Ancestors, we borrowed it from our children - Indian Proverb
The biggest challenge to be tackled is to reduce the gap between scientists on the one hand and policymakers, students and the public at large on the other. One way to do so is through targeted capacity-building activities and better communication of satellite Earth observation capabilities in a way that meets the needs of each stakeholder.