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.
-
- 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
-
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 °CPressure
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 -
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
