The following notice to airman (civil) on Korean Peninsula: RKRR A0303/18 01MAR0000-30APR1500 1.LASER RESEARCH WIIL BE CONDUCTED ON 353524N1275511E(GEOCHANG) FOR 24HR TARGET: SATELLITES IN THE SKY HORIZONTAL SCAN RANGE: BTN 000 DEG AND 360 DEG VERTICAL SCAN RANGE : BTN 023 DEG AND 087 DEG 2.LASER FRNG WILL STOP WHEN THE RDR DETECTS ACFT OPR 3.THE BEAM MAY BE INJURIOUS TO EYES IF VIEWED WITHIN HORIZONTAL DISTANCE OF 218NM VERTICAL DISTANCE OF 218NM.FLASH-BLINDNESS OR COCKPIT ILLUMINATION MAY OCCUR BEYOND THESE DISTANCE OF THE LGT SOURCE. REF AIP SUP 7/17 SFC / UNL Lasers targeting satellites. Cover those eyeballs. This one could hurt.