The level 1B and level 2 data of 1 day is projected to the map in accordance with the specified
projection technique (Equi-Rectangular or Polar Stereographic) as described in the section 4.2.2, and
then the arithmetic average of 1 day is computed on each grid. Moreover, level 3 data for 1 day of each
geophysical parameter is inputted for 1 month, arithmetic average of 1 month is computed on each
grid, as the same way as 1 day average calculation. These statistical values are computed for
observation data on ascending orbit and descending orbit respectively.
When packet is missed caused by any reasons, the observation data corresponding to the portion
into which the missing packet is filled by dummy data. Dummy data value is always
-9999.Additionally, when there is no data in a grid, -8888 is set to the grid as dummy data.