GTS1 Digital Radiosonde

GTS1 Digital Radiosonde

Introduction

In operation with GFE (L) 1 Secondary Radar (also named L Band Radar), GTS1 digital radiosonde can

measure the atmospheric temperature, pressure, relative humidity, wind direction and wind velocity from groundup to an altitude of 30,000m. In 2001, GTS1 came into use in some upper air stations as the new generation upper air sounding system in China.Up to now, in China, there are 80 GTS1-L Band Secondary Radar Upper-air Stations.

Feature

The ground installation includes GFE (L) 1 secondary Radar and the computer terminal with the

corresponding recording and processing equipments, and also the ground check set JKZ1.

GFE (L) 1 SECONDARY RADAR

The 1680MHz receiver is located in the antenna unit for radar measurement system, so that the loss of UHF

in the cable is reduced a lot.

The Radar captures and automatically tracks signals transmitted from a radiosonde attached to a balloon to

obtain atmospheric conditions, calculate wind direction and wind velocity while the balloon is being uplifted. It

inputs the received data, along with angle data and time signal into the data processing unit for real time data

processing.

GROUND CHECK SET JKZ1

Ground checking of GTS1 digital radiosonde is done with the Ground Check Set JKZ1 and the computer

terminal. It is used to find out the rejects by comparing with the reference standard and ensuring excellent PTU

measurement accuracy.

Technical Parameter

METEOROLOGICAL SENSORS

Temperature White rod thermistor

Range       +50°C~ -90°C

Accuracy (standard deviation)

+50°C~ -80°C       0.2°C

-80°C~ -90°C       0.3°C

Resolution           0.1°C

Humidity     Carbon-film lamellar hygristor

Range       0%RH ~ 100%RH

Accuracy (standard deviation)

15%RH ~ 95%RH

T≥-25°C       5%RH

T< -25°C     10%RH

Resolution     1%RH

Pressure Silicon electric-bridge pressure sensor

Range   1060hPa ~ 5hPa

Accuracy (standard deviation)

1050hPa ~ 500hPa   2hPa

500hPa ~ 5hPa     1hPa

Resolution         0.1hPa

Measurement cycle for PTU sensors   1.2sec

DIMENSIONS AND WEIGHT

Dimensions(l×b×h)        190×90×245mm

Weight (battery-activated)    ≤400g

BATTERY

Water-activated battery     ±12.5V ~±13.5V

Operation time             ≥100min 

TELEMETRY

Transmitter type               Analog

Carrier center frequency        (f0) 1676.5MHz±3MHz

Frequency range               1673.5MHz ~ 1679.5MHz

Output power                 ≥400mW

Modulation mode              AM

Quench frequency             800kHz±15kHz

Subcarrier frequency           32.7kHz±0.5kHz

Antenna gain                 ≥1dB

Receiving sensitivity           ≤20μW/m

Transmission rate            1200Baud

Transmission cycle             ≤1.5sec

Sounding range               200km

Sounding altitude              Up to 30km

CALIBRATION

Factory calibration            Stored in floppy disk

Ground check                Prior launch

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