Select the strip-shaped tiane in Kanwei 0 to 20 for simulation. The average daily observation time was 12 hours. Assuming 6 times a day, a observed plan was developed at 2 hours. Each time the observatory is set to 2H. China Tiandong 1.5h, China is 0.5h. Assume that the observation time per day is different from the previous day to 3'56 '' (about 1 degree red "). Each 180 days is performed once an increase or decrease conversion. The overlay is completely 90%. The number of targets, central red rivers, and decline in each observation record. And add the number of observed targets.
