RELATIONSHIP BETWEEN GPS PRECIPITABLE WATER VAPOR AND PRECIPITATION

Previous study shows that GPS precipitable water vapor (PWV) and local precipitation have close relationship.Observation of 2002 Anhui province and 2000 Beijing experiment shows that 2-hour increment of GPS PWV and local precipitation have good relationship. The correlation coefficient in mountain area is about 70 %, larger than that in plain area. Rainfall occurs in 4 hours after the rapid increase of PWV.The maximum hourly rainfall is proportion to the PWV increment.