0 0 MANUAL OBSERVATION
1 1 CEILOMETER SYSTEM
2 2 INFRARED CAMERA SYSTEM
3 3 MICROWAVE VISUAL CAMERA SYSTEM
4 4 SKY IMAGER SYSTEM
5 5 VIDEO TIME-LAPSED CAMERA SYSTEM
6 6 MICROPULSE LIDAR (MPL) SYSTEM
14 14 OTHERS
15 15 MISSING VALUE
