Radiosonde system
IMK-TRO operates two mobile radiosonde stations to investigate in situ the vertical structure of the atmosphere from surface level up to the lower stratosphere. Currently Ground stations of type GS-E from GRAW Radiosondes GmbH http://www.graw.de http://radiosondes.com are used togegher with DFM-09 radiosondes. They performed very well during the last WMO intercomparison of high quality radiosonde systems 2010 https://www.wmo.int/pages/prog/www/IMOP/publications/IOM-107_Yangjiang.pdf
At an average ascent rate of 5 m s-1 the radiosondes reaches peak heights of 19 km delivering a full data set of temperature, humidity and wind information every 6 m. For most measurement campaigns the radiosonde profiles are uploaded into the GTS system and assimilated into weather forecast models.
Application examples
Fig. 1: Temporal evolution of wind profiles in the lower in the lower troposphere on 16 August 2014 near Masada, Israel. Ascent frequency 2 h
|
Fig. 2: Interpolated temporal evolution of specific humidity in the lower troposphere on 16 August 2014 near Masada, Israel. Ascent frequency 2 h |
Technical Data (manufacturer information) |
Groundstation GS-E (Receiver) |
Type: | DDS-based dual-conversion superheterodyne with software-defined las IF stage and demodulator |
Frequency range: | 400 MHz - 406 MHz |
Tunig steps: | 20 kHz |
GPS | |
Channels: | 20 |
Connections | |
400MHz antenna: | 2 |
GPS antenna: | 1 |
GPS repeater: | 1 |
USB connection to PC: | 1 |
USB connection to radiosonde: | 1 |
PC Requirements | |
Operationg system: | Windows Vista/Windows 7/Windows 10 |
Interface: | USB |
Power supply | |
AC: | 110 V/AC to 250 V/AC |
DC: | 10 V/DC to 32 V/DC |
Dimensions | |
Size: | 320 mm x 190 mm x 90 mm |
Weight: | 3300 g |
http://www.graw.de/home/products2/groundstationequipment00/groundstationgs-e/
Radiosonde DFM-09 |
Weight: | < 90 g, ready to start |
Size: | 200 mm x 42 mm x 60 mm |
Battery: | Dry Lithium |
Activation: | Switch |
Wind finding: | Differential GPS (20 channels) |
Transmission-rate: | One full data set per second |
Bandwith: | < 20 kHz |
Frequency deviation: | +/- 3 kHz |
Modulation: | FSK |
Error correction telemetry: | Code-spreading, interleaving |
Temperature resolution: | 0.1 °C |
Temperature accuracy: | < 0.2 °C |
Humidity resolution: | 1 % rH |
Humidity accuracy: | < 5 % rH |
Pressure accuracy: | < 0.3 hPa |
Geopotential height accuracy: | < 10 m |
Wind speed accuracy: | < 0.2 m/s |
Accuracy horizontal position: | < 5 m |
http://www.graw.de/home/products2/radiosondes0/radiosondedfm-090/