Search results for calibration target

Ecology Apr 16, 2024

From tape measures to space lasers: Quantifying biomass of the world's tallest forests

In this era of accelerating climate crisis, accounting for all aspects of Earth's carbon cycle is a crucial task. The magnitude of atmospheric carbon burden means trees and forests are limited but important instruments among ...

Astronomy Apr 5, 2024

NASA's NEOWISE extends legacy with decade of near-Earth object data

As the infrared space telescope continues its long-duration survey of the universe, it is creating a unique resource for future astronomers to make new discoveries.

Optics & Photonics Apr 2, 2024

Using one single image to realize on-orbit calibration of space camera lens distortion

In various space tasks such as space rendezvous-docking and on-orbit maintenance, the measurement of the relative posture and position of non-cooperative spacecraft is a key component. However, the commonly used global positioning ...

Space Exploration Mar 26, 2024

Euclid's sight has been restored

A newly devised procedure to de-ice Euclid's optics has performed significantly better than hoped. Light coming in to the visible "VIS" instrument from distant stars was gradually decreasing due small amounts of water ice ...

Optics & Photonics Mar 19, 2024

A method to accurately center quantum dots within photonic chips

Devices that capture the brilliant light from millions of quantum dots, including chip-scale lasers and optical amplifiers, have made the transition from laboratory experiments to commercial products. But newer types of quantum-dot ...

Environment Mar 14, 2024

How AI is clearing the waters in urban rivers

Researchers have developed a new machine learning system to improve the accuracy and efficiency of sewer-river system models. This innovative approach, detailed in an article published in Environmental Science and Ecotechnology, ...

Earth Sciences Mar 4, 2024

Enhancing statistical reliability of weather forecasts with machine learning

A global team of researchers has made strides in refining weather forecasting methods, with a specific focus on addressing the persistent issue of "quantile crossing." This phenomenon disrupts the order of predicted values ...

Astronomy Jan 9, 2024

Einstein Probe lifts off on a mission to monitor the X-ray sky

The Chinese Academy of Sciences (CAS) spacecraft Einstein Probe lifted off on a Chang Zheng (Long March) 2C rocket from the Xichang Satellite Launch Center in China at 15:03 CST / 07:03 GMT / 08:03 CET on 9 January 2024. ...

Archaeology Jan 8, 2024

Reading genetic information of ancient Teotihuacans

Teotihuacan was one of the largest metropolitan centers in ancient Mesoamerica in the pre-Columbian era. Six ancient individuals unearthed from the Teotihuacan between the third and seventh centuries AD were examined in a ...

Ecology Jan 2, 2024

New high-speed video system uses sensors, infrared illumination to track insects in large wild areas

Our ability to learn more about insect behavior—which affects ecology, health, and economy on a global scale—depends largely on suitable recording technology. But until now, these tools have been considerably limited.

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