Which of the following digital modes is designed for meteor scatter communications?

MSK144 is a digital mode specifically developed as part of the WSJT-X software suite to take advantage of short, rapid bursts of signal reflection caused by meteor trails (meteor scatter). It uses 144-baud Minimum Shift Keying to transmit data in fractions of a second, which is perfectly suited for these brief propagation openings. WSPR is designed for weak-signal propagation probing over minutes, not rapid bursts. Hellschreiber is an older visual text mode, and APRS is an automatic packet reporting system used primarily for tracking and short messages on VHF/UHF. None of these other modes are optimized for the fleeting, high-speed reflections of meteor scatter.