Image: Proba-V monitors African Sahel

Image: Proba-V monitors African Sahel
Credit: ESA/Belspo – produced by VITO

ESA's Proba-V minisatellite reveals the seasonal changes in Africa's sub-Saharan Sahel, with the rainy season allowing vegetation to blossom between February (top) and September (bottom).

The semi-arid Sahel stretches more than 5000 km across Africa, from the Atlantic Ocean (Senegal, Mauritania) to the Red Sea (Sudan). The few months of the in the Sahel are much needed in these hot and sunny parts of Africa, and are critical for the food security and livelihood of their inhabitants. 

The name Sahel can be translated from Arabic as coast or shore, considered as the ever-shifting landward 'coastline' of the arid Sahara Desert.

Smaller than a cubic metre, Proba-V nevertheless images the entire land surface of Earth every two days or less, allowing researchers around the globe to trace gradual shifts in vegetation.

A new set of timelapse videos shows the power of such rapid-repeat views.

Launched on 7 May 2013, Proba-V is a miniaturised ESA satellite tasked with a full-scale mission: to map land cover and across the entire planet every two days.

Its main camera's continent-spanning 2250 km swath width collects light in the blue, red, near-infrared and mid-infrared wavebands at 300 m resolution and down to 100 m resolution in its central field of .

VITO Remote Sensing in Belgium processes and then distributes Proba-V data to users worldwide. An online image gallery highlights some of the mission's most striking images so far, including views of storms, fires and deforestation.


Explore further

Image: Proba-V captures desert irrigation

Citation: Image: Proba-V monitors African Sahel (2017, July 26) retrieved 15 August 2020 from https://phys.org/news/2017-07-image-proba-v-african-sahel.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
4 shares

Feedback to editors

User comments