English Dictionary

pilot balloon observation

名詞

(meteorology) A method of winds-aloft observation, temperature, and relative humidity of the upper that is, the determination of wind speeds and air and to automatically transmit that directions in the atmosphere above a station. This is done by reading the elevation and azimuth angles of a theodolite (instrument) observation while visually tracking a pilot balloon. The ascension rate of the balloon is approximately determined by careful inflation to a given total lift. After release from the ground, periodic readings (usually at one-minute intervals) of elevation and azimuth angles of the balloon are recorded. These data are transferred to a winds-aloft plotting board, and wind speed and direction at selected levels are calculated by trigonometric methods.

日本語の意味

パイロットバルーン観測とは、気象観測の手法の一つであり、地上からパイロットバルーンを放出し、その上昇中のバルーンの仰角や方位角を測定することで、高層大気における風速・風向、温度、相対湿度などを求める方法です。 / 放出後、定期的（通常は1分間隔）に測定された角度データを三角測量などの手法によって解析し、所定の高度における風の状態を計算します。

The meteorology team conducted a pilot balloon observation at dawn to measure the wind profile above the valley.

気象チームは谷の上空の風プロファイルを測定するため、夜明けにパイロット気球観測を行った。

意味（1）

(meteorology) A method of winds-aloft observation, temperature, and relative humidity of the upper that is, the determination of wind speeds and air and to automatically transmit that directions in the atmosphere above a station. This is done by reading the elevation and azimuth angles of a theodolite (instrument) observation while visually tracking a pilot balloon. The ascension rate of the balloon is approximately determined by careful inflation to a given total lift. After release from the ground, periodic readings (usually at one-minute intervals) of elevation and azimuth angles of the balloon are recorded. These data are transferred to a winds-aloft plotting board, and wind speed and direction at selected levels are calculated by trigonometric methods.

pilot balloon observations （ plural ）