Functional Precision of National Weather Service Upper-Air Measurements Using VIZManufacturing Co. 'B' Radiosonde (Model 1492-520)

摘要

The functional precision of VIZ Model 1492-520 (VIZB) radiosonde was determinedusing the National Weather Service functional analysis test package. The comparisons were made from 33 flights of paired radiosondes suspended from the same balloon. Functional precision is given by the root mean square of the differences between measurements made by 2 sensors of the same type exposed to the same environment. Results are summarized for simultaneous measurements at one minute intervals as well as measurements at a predefined set of pressure levels. These tests were conducted for the acceptance of contract production samples and results are reported here for use by the meteorological community in specifying the characteristics of this radiosonde, which operational use started in 1989.