Both images were made using narrowband filters and different color mappings .
两张照片都用窄波段滤光镜和不同颜色映射。
Research on uwb coexistence with narrowband systems - 21ic .
uwb系统与窄带系统共存研究。
The sharp image , made using broadband and narrowband filters , captures striking details of the nebula 's filamentary structures . It shows off a blue-green color from strong emission due to oxygen atoms in the glowing gas .
