Concetti Chiave
Earth+ introduces a novel approach to satellite imagery compression, leveraging constellation-wide sharing of fresh reference images to reduce downlink usage significantly.
Sintesi
Earth observation satellites face downlink limitations, hindering data availability. Earth+ addresses this by utilizing fresh reference images from multiple satellites in a constellation, reducing downlink bandwidth by 1.3-3.3x without compromising image quality. By selecting cloud-free references and compressing changed tiles efficiently, Earth+ optimizes onboard storage and uplink bandwidth usage.
Statistiche
Earth+ reduces downlink usage by a factor of 3.3 compared to state-of-the-art techniques.
Uplink bandwidth: 250 kbps in DOVEs constellation.