Abstract: In this paper, we first propose a new design strategy of 2D Z-complementary array quads (2D-ZCAQs) with feasible array sizes. A 2D-ZCAQ consists of four distinct unimodular arrays satisfying ...
Abstract: In this letter, a novel sparse array consisting of coprime and nested subarrays is designed and a corresponding two-dimensional (2-D) direction of arrival (DOA) estimation method is ...
Artemis 2 commander Reid Wiseman gazes at the moon ahead of NASA's historic lunar flyby on April 6, 2026. (Image credit: NASA) About 13.5 hours later, the four Artemis 2 astronaut ...
Artemis 2 astronauts witness a rare solar eclipse from beyond the moon during their historic lunar flyby. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...
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