### 98/12/03
   Due to rather heavy snowfall on Dec.3, quality of data corresponding
   to the following time periods are heavily deteriorated.
   06:00  - 06:45 UT

### 98/12/04
   Due to rather heavy snowfall on Dec.3, quality of data corresponding
   to the following time periods are heavily deteriorated.
   Dec. 3, 22:45 UT - Dec. 4, 02:00 UT