As the constellation of Earth-observing satellites grows ever more crowded, the question of whether their measurements can be trusted — and compared — has become one of the quiet urgencies of our technological age. In late November, Perth will gather the world's foremost synthetic aperture radar specialists under Australia's CEOS leadership to forge the common standards that allow radar satellites, regardless of origin, to speak a shared scientific language. It is the kind of unglamorous, essential work that underpins everything from disaster response to environmental stewardship — the calibra