SDO FFT Sigmoid sniffer module movie
Sigmoid Sniffer (Georgoulis, Raouafi): Automatically detects and outlines X-ray sigmoids in the solar corona, determining their chirality (direct [S] or inverse [Z] sigmoids), aspect ratio, heliographic location, and host solar active region, if any. Operates in 94 ̊A (example shown) and 131 ̊A AIA images. The square encloses a detection with the actual sigmoid bounded by the blue contour, and the circle provides the detection limits on the solar disk.
