• Radiosondes
  • The radiosonde is a balloon-borne instrument platform with radio transmitting capabilities. Originally named a radio-meteorograph, the instrument is now referred to as a radiosonde, a name apparently derived by H. Hergesell from a combination of the words "radio" for the onboard radio transmitter and "sonde", which is messenger from old English. The radiosonde contains instruments capable of making direct in-situ measurements of air temperature, humidity and pressure with height, typically to altitudes of approximately 30 km. These observed data are transmitted immediately to the ground station by a radio transmitter located within the instrument package. The ascent of a radiosonde provides an indirect measure of the wind speed and direction at various levels throughout the troposphere. Ground based radio direction finding antenna equipment track the motion of the radiosonde during its ascent through the air. The recorded elevation and azimuth information are converted to wind speed and direction at various levels by triangulation techniques. [Source: University of Wisconsin, Atmospheric and Ocean Sciences] Group: Platform_Details Entry_ID: RADIOSONDES Group: Platform_Identification Platform_Category: Balloons/Rockets Short_Name: RADIOSONDES End_Group Group: Platform_Associated_Instruments Short_Name: RADIOSONDES End_Group Creation_Date: 2007-08-21 Online_Resource: Sample_Image: Group: Platform_Logistics Primary_Sponsor: USA/NOAA End_Group End_Group
Abstract from DBPedia
    A radiosonde is a battery-powered telemetry instrument carried into the atmosphere usually by a weather balloon that measures various atmospheric parameters and transmits them by radio to a ground receiver. Modern radiosondes measure or calculate the following variables: altitude, pressure, temperature, relative humidity, wind (both wind speed and wind direction), cosmic ray readings at high altitude and geographical position (latitude/longitude). Radiosondes measuring ozone concentration are known as ozonesondes. Radiosondes may operate at a radio frequency of 403 MHz or 1680 MHz. A radiosonde whose position is tracked as it ascends to give wind speed and direction information is called a rawinsonde ("radar wind -sonde"). Most radiosondes have radar reflectors and are technically rawinsondes. A radiosonde that is dropped from an airplane and falls, rather than being carried by a balloon is called a dropsonde. Radiosondes are an essential source of meteorological data, and hundreds are launched all over the world daily.

    ラジオゾンデ (仏: radiosonde、英: radiosonde) とは、気球に取り付けて飛ばし、高層大気の気温・湿度・気圧などを測定し、測定値を無線で地上に送信する装置。