Australian scientists are on the cusp of a groundbreaking innovation in Earth observation: the Earth Dynamics Geodetic Explorer (EDGE) mission. This cutting-edge project, led by renowned glaciologist Helen Amanda Fricker, is set to revolutionize our understanding of our planet's critical regions. But what makes EDGE truly remarkable is its potential to transform how we monitor and study our world, from the icy landscapes of Antarctica to the lush forests of the Amazon.
A Global Vision
EDGE is designed as the world's first global, swath-imaging LiDAR satellite. This means it will simultaneously monitor land, ice, and coastal regions, providing unprecedented data on our planet's vital signs. With a focus on high-resolution imaging, EDGE will offer continuous data in five, 120-meter-wide swaths, surpassing the capabilities of previous satellite altimeters.
Aussie Collaboration and Expertise
The project boasts significant Australian involvement, with Dr. Alex Fraser from the University of Tasmania playing a crucial role. Dr. Fraser's expertise lies in tracking sea-ice coverage around Antarctica, and he's excited about how EDGE will enhance this research. By measuring the height of Earth's dynamic surface with incredible precision, from the cracks in Antarctic glaciers to the height of the Amazon rainforest, EDGE will provide invaluable insights.
Unmatched Coverage and Accuracy
EDGE will be equipped with 40 LiDAR beams, a significant upgrade from the six aboard NASA's ICESat-2. This increase in LiDAR beams enables the satellite to capture vertical differences with an astonishing accuracy of less than three centimeters from an orbit 390 kilometers above the Earth.
Beyond Ice: Biodiversity, Fire Risk, and Carbon Storage
The mission's impact extends far beyond ice-covered regions. It will also be instrumental in biodiversity monitoring, fire risk assessment, and carbon storage accounting. For instance, team member Chris Hakkenberg from UCLA highlights EDGE's ability to consistently and precisely monitor 3D forest habitats from the tropics to the boreal regions, aiding in next-generation wildfire management tools.
A Legacy of NASA's ICESat-2 and GEDI
EDGE builds upon the success of NASA's ICESat-2 and GEDI (Global Ecosystem Dynamics Investigation). ICESat-2, a free-flying satellite, and GEDI, an instrument on the International Space Station, have already contributed significantly to our understanding of the planet. EDGE aims to further enhance these efforts, providing a more comprehensive and detailed view of our changing world.
A Journey to Launch
Both EDGE and its companion mission, STRIVE, will undergo further development before a progress and funding review in 2027. If approved, the launches are scheduled for no earlier than 2030, marking a significant milestone in Earth observation technology.
