iMet-54 Research Radiosonde
The iMet-54 research radiosonde utilises the XData protocol to seamlessly connect to 3rd party sensors such as an ECC Ozonesonde. The XData is transmitted alongside the iMet-54’s data and processed seamlessly with the D-Met sounding software.
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- EN-SCI Ozonesone sensor (link)
- EN-SCI En-SCI Cryogenic Frost Point Hygrometer sensor (link)
- Capacitive polymer humidity with integrated heater for fast response at low temperature/high altitude
- Integrated heating of the humidity sensor reduces the effects of icing during flight
- A very small mass glass bead thermistor facilitates extremely fast response to temperature changes. Reflective coating reduces the effects of solar radiation while a hydrophobic polymer counters evaporative cooling events
- SI traceable sensor calibration
- High sensitivity, multi-constellation GNSS provided unparalleled accuracy of wind and altitude measurement
- ETSI certified telemetry transmitter provides error free data transmission without interference. Forward-error correcting techniques ensure fault correction for a highly robust telemetry link
- Enclosed dry lithium battery do not need prior connection. Easy-to-use pushbutton controls power and preset transmission frequencies
- User-selectable transmission frequency anywhere within the assigned meteorological frequency bands
- No pre-flight recalibration required – all sensors are factory calibrated
- Auto launcher ready
- Compact and light weight – 70 x 30 x 235 mm and only 80 grams
- Reduced environmental impact
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System overview
Battery Lithium Primary Operating time > 180 min Dimensions (L x W x H) 235 x 70 x 30 mm Weight 80 grams Calibration Stability 2 years Power control Wireless or Push button GPS Receiver
Type GNSS Channels 99 Channels GNNS Systems GPS + GLONASS Cold Start Acquisition Time 35 s (nominal) Reacquisition Time 1 s (nominal) Horizontal Position Accuracy 2.5 m (CEP) Humidity
Type Thin Polymer Capacitive Range 0% to 100% RH Resolution 0.01% RH Response Time 6 m/s, 1000 hPa, +20°C < 0.4 s 6 m/s, 1000 hPa, 0°C < 1 s 6 m/s, 1000 hPa, – 20°C < 3.2 s 6 m/s, 1000 hPa, -40°C < 20 s Repeatability in Calibration 2% RH Uncertainty 4% RH Reproducibility 3% RH Temperature
Type Bead Thermistor Range -90°C to +60°C Resolution 0.01°C Response time (still air) <2 s @ 1000hPa Response time (6 m/s flow) 0.5 s @ 1000hPa Repeatability in Calibration 0.1°C Uncertainty > 100 hPa 0.3°C Uncertainty < 100 hPa 0.5°C Reproducibility > 100 hPa 0.1°C Reproducibility < 100 hPa 0.25°C Pressure (GNSS derived)
Type GNSS derived Range 1080 to 3 hPa Resolution <0.01 hPa Uncertainty: 1080 – 400 hPa 1 hPa Uncertainty: 400 – 100 hPa 0.4 hPa Uncertainty: 100 – 3 hPa 0.2 hPa Reproducibility: 1080 – 400 hPa 0.6 hPa Reproducibility: 400 – 100 hPa 0.3 hPa Reproducibility: 100 – 3 hPa 0.3 hPa Pressure (optional sensor)
Type Piezo-resistive sensor Range 1200 to 10 hPa Accuracy ±0.15hPa Resolution <0.13 hPa Response Time <8.22 milliseconds Telemetry
Transmission type Synthesized Maximum range >250 km Frequency band 400 – 406 MHz Frequency stability ±2 kHz Deviation (peak to peak) 4.8 kHz Output power 200 mW Emission Bandwidth According to EN 302 054 Sideband Radiation According to EN 302 054 Modulation GFSK Data rate 4800 bit/s Frequency selection Wireless or push
buttonPush button frequencies 402, 403, 404, 405 MHz Wireless frequency selection 400 – 406 MHz (10 kHz resolution) Wind
Type GNSS derived Wind Speed Range 0 to 150 m/s Wind Speed Resolution 0.1 m/s Wind Speed Uncertainty <0.15 m/s Wind Speed Reproducibility <0.1 m/s Wind Direction Range 0 to 360° Wind Direction Resolution 0.01° Wind Direction Uncertainty 1° Wind Direction Reproducibility 1° Geopotential Height
Type GNSS derived or optional Piezoresistive Range 0 to 50 km Resolution 0.1m Uncertainty 8m Reproducibility 5m -
Product Description Product Code 403Mhz Research radiosonde IMET-54-AR 1680Mhz Research radiosonde IMET-54-BR
