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Rocketsonde

The rocketsonde is similar to a dropsonde except that a

rocket is used to carry the sonde to the desired

deployment altitude where the sonde is ejected and

floats to Earth on a small parachute. Two types of

rocketsondes are in use today, and are classified

according to their maximum altitude. High-altitude

rocketsondes are used primarily by the military and use a large rocket to carry the sensor package to

altitudes in excess of 70 km. The Super Loki solid-fuel

rocket motor is typically the launch vehicle for highaltitude

rocketsonde deployments. Two meters long, it

accelerates to 1500m per second, and delivers its

meteorological payload above the stratosphere into

the mesosphere. The typical payload package, called a

dart, is approximately 1.1m long with an inside tube

diameter of less than 5 cm, and contains the meteorological

sonde. After the rocket motor burns out, the

dart continues to coast to an altitude ranging from 70

to 110 km. At apogee, a timed detonation of a small

explosive charge located in the tail of the dart ejects the

meteorological payload, which then begins its parachute-

aided descent. The payload consists of either a

meteorological sensor package – the rocketsonde – or

an inflatable sphere. The high-altitude rocketsondes

often contain a transponder, a miniature receiver–

transmitter that can be tracked by a radio direction

finding and ranging system to determine winds and

altitude. The inflatable sphere provides atmospheric

density data, obtained from its fall velocity as determined

by a precision tracking radar.

The second type of rocketsonde is smaller and less

expensive, and is used to measure only thermodynamic

variables in the lower 1–3km of the atmosphere

above earth. The Vaisala RK91 low-altitude rocketsonde

(Figure 12) is primarily designed for naval shipboard operations that require observations of the

refractive index profile near the ocean surface, but can

also be used over land where only thermodynamic

data are required. The RK91 can be prepared for

launch in less than 10 min; it reaches apogee in less

than 20 s, and provides a detailed thermodynamic

profile with 1 s resolution. After ejection of the sonde

payload, the sonde drifts on a parachute to the surface

from an altitude of 1 km in less than 6 min. Vertical

resolution is dependent on the rate of descent (typically

3msꠑ1), rate of data transmission (1 Hz) and

sensor response time. At temperatures above freezing,

vertical resolution is about 3m.

도와줍쇼 굽신굽신

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어이구 도와드리려고 했는데 ㄷㄷ

[Arjen_ROBBEN]

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한두줄이면 해보려고했더니ㅋㅋㅋㅋ이걸 누가 해주겠어요

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ㅠㅠ도와주세요 형님들.........................