OMTI Home Page .1. All the plotted data and images are just for browsing purpose and are not fully calibrated. Please do not use the data at any presentations and publications without contacting the Principal Investigators, K. Shiokawa or T. Ogawa (shiokawa[AT]stelab.nagoya-u.ac.jp or ogawa[AT]stelab.nagoya-u.ac.jp) 2. Digital data are available on request. Please contact the Principal Investigators to copy the data. The Principal Investigators may limit the use of the data in order to avoid possible confliction of the scientific directions of the users. 3. The all-sky image data at Rikubetsu (camera 3 after October, 1998) is upside down (upward is toward the south) for October 20, 1998 - March 31, 1999. Please see figure captions. 4. For the SATI data, the values of temperature may be corrected in the future by using new calibration data sets. Please also see the background level in the plots. High background means cloudy sky during which the temperature and intensity data become meaningless. 5. There are several lack of camera images (dark or white images in the plots) during a night, probably because of some problem in the data transfer from the camera to the computer. We have not fixed the problem yet. 6. Camera No.1 often generates artificial wave pattern, probably caused by some noise embedded on the image data. The wave pattern is very weak in the original images, but is enhanced due to subtraction of average image. 7. Please refer Shiokawa et al. [1999] for details of the instrumentation.