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iMet-2 Radiosonde

iMet-2 Radiosonde

The iMet-2 radiosonde is a performance-tested, high accuracy radiosonde. Launched in 2009, it has been flown globally; from the Arctic to the Equator and even on research vessels. Since its launch, the iMet-2 has been revised several times taking full advantage of sensor and calibration improvements.

  • Key Features
    • Capacitive thin-film polymer humidity sensor
    • Micro glass bead thermistor temperature sensor
    • Optional solid-state pressure sensor
    • 12 Channel C/A code GPS
    • Dry cell (alkaline) batteries
    • No pre-flight temp & humidity re-calibration required
    • Switch controlled frequency selection
  • Specifications

    System Overview

    Operating Principle GPS Wind Finding
    Nominal Frequencies 403 MHz OR 1680 MHz
    Battery Alkaline dry cell
    Operating time > 3 hours
    Weight 200 g
    Sampling Rate 1 Hz
    Case Expanded Polystyrene

    Transmitter

    Tuning Range 400.15 – 406 MHz  OR  1668.4 – 1690MHz
    Output Power 200 mW
    Transmission 4800 baud, FSK
    Bandwidth 12 kHz
    Stability Better than 1 kHz

    GPS receiver

    Type C/A code, 12 channel
    Tracking Continuous
    Update rate 1 Hz
    Acquisition Time < 50 seconds (cold start)
    Position accuracy 10 m
    Wind velocity accuracy 1.0 m/s

    Temperature

    Type Bead Thermistor
    Range -90 °C to +60 °C
    Accuracy 0.3 °C (1080 to 100 hPa)
    0.6 °C (100 to 3 hPa)
    Resolution <0.01 °C
    Response time < 0.7 s (in 6 m/s moving air)
    Stability < 0.1 °C/year

    Humidity

    Type Capacitive thin film polymer
    Range 0 % to 100 % RH
    Accuracy 5 % RH
    Resolution 1 % RH
    Response time 0.37 s @ 20 °C
    0.87 s @ 0 °C
    3.2 s @ -20 °C
    20 s @ -40 °C

    Pressure

    Type GPS derived OR Piezoresistive sensor (optional)
    Range 1080 to 3 hPa
    Accuracy < 1 hPa (1080 to 100 hPa)
    < 0.3 hPa (100 to 3 hPa)
    Resolution 0.1 hPa
  • Ordering Information
    Product Description Product Code
    403MHz Radiosonde IMET-2-AA
    403MHz Radiosonde with pressure sensor IMET-2-AB
    1680Mhz Radiosonde IMET-2-BA
    1680MHz Radiosonde with pressure sensor IMET-2-BB
    1680MHz RDF radiosonde IMET-2-BI
    403Mhz Research radiosonde IMET-2-AR
  • Documents

    Download Brochure

    Product Breakdown

    Request solar corrections document

    Request test flight data

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iMet-P Pilotsonde

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iMet-50 Pilotsonde

iMet-54 Research Sonde

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iMet-54 Research Radiosonde

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