Reference Radiosonde Data. Version 1.0

During the International H20 Project 2002 (IHOP 2002), Reference Radiosondes were released sixteen times. Either a Vaisala RS80 radiosonde released from the Homestead site or a National Weather Service (NWS) VIZ radiosonde released from Dodge City, KS accompanied the Reference Radiosondes during their flights. Consult the README for dates and times when the Reference Sondes were released and from which site sondes were released simultaneously. There are some issues with the Reference Radiosonde data. The following is just a summary. For a more detailed explanation please see the "Important Notes to Users" section in the readme file. Pressure Errors: The Reference Sonde (RS) uses a hypsometer to measure pressure, and this sensor hasbeen found to be unreliable. We suggest not using the RS pressure data. Time difference: The time difference in the launch time between the RS sounding files and the VIZ/Vaisala soundings is due to the RS recording data on the ground, while the other sondes began recording closer to, or at, the actual launch time. Wind data: The RS wind data were not corrected for balloon pendulum swing because the effects of the balloon swing are large, they vary from sounding to sounding, and because the focus of the RS for IHOP was on the humidity measurements.

在2002年国际H2O项目（International H20 Project 2002，简称IHOP 2002）期间，参考探空仪（Reference Radiosondes）共开展16次释放作业。每次飞行观测中，要么搭载从霍姆斯特德（Homestead）站点释放的维萨拉（Vaisala）RS80探空仪，要么搭载从堪萨斯州道奇城（Dodge City, KS）释放的美国国家气象局（National Weather Service，简称NWS）VIZ探空仪，与参考探空仪一同执行观测。
有关参考探空仪的释放日期、时刻以及同步搭载的探空仪释放站点信息，请查阅自述文件（README）。参考探空仪的数据存在若干问题，以下仅为简要概述，详细说明请参见自述文件中的"用户重要注意事项"章节。
气压误差：参考探空仪（Reference Sonde，RS）采用气压测高仪（hypsometer）测量气压，经检测该传感器可靠性欠佳，因此建议勿使用参考探空仪的气压数据。
时间偏差：参考探空仪探空文件与VIZ/维萨拉探空文件的投放时刻存在差异，原因在于参考探空仪在地面阶段即开始记录数据，而其余探空仪则是在接近实际投放时刻或投放时刻才启动记录。
风速数据：参考探空仪的风速数据未针对气球摆荡（balloon pendulum swing）进行校正，原因包括气球摆荡的影响显著、不同探空任务间的摆荡效应存在差异，且IHOP项目中参考探空仪的观测核心为湿度测量。