ARC

All-sky radiance closure

7 January 2025 - 7 February 2025

Lead Scientist: Yi Huang

Observatory: OSC

When new atmospheric remote sensors are developed, it is crucial to test and verify the accuracy of the sensors. Radiance closure tests, which compare radiometer-measured and numerical model-simulated atmospheric radiance, afford a powerful method for validating new instruments as well as simulation models. In this experiment, we conduct pan-spectral tests of several hyperspectrometers, operating in mid- and far-infrared and microwave electromagnetic wave spectra respectively. The experiment will be carried out in a cold winter month in Canada, during which an international team consisting of scientists from Canada, USA, UK, and Italy will deploy their radiometers to acquire spectral radiance data from the ground and from aircraft and inter-compare them against atmospheric profiles obtained from independent radiosonde and remote sensing measurements.