History

Founding of the company Dr. GRAW Messgeräte in Berlin / Germany by the physicist Dr. Josef Graw

Dr. Graw developed and patented the heart of the former mechanical radiosondes, the Graw morse encoding cylinder

By this invention, the measurement-precision was greatly improved

Relocation of the company to Nürnberg / Germany

Development of the Radiosondes H50 and M60 for German Weather Service

M60 pushed GRAW-sondes to an international leading position in terms of accuracy and robustness

Mr. Horst Schmidmer took over all shares of Dr. Graw

License production of Radiosonde RSG for German Weather Service and E076 for German Army

Introduction of the Radiosondes E084 and E085 for German Army

Start of completely computer-controlled production and calibration

Introduction of the mini Radiosonde System TDFS / KS-87 for environmental monitoring in lower heights

Start of Surface Mounted Technologie (SMT) to increase productivity

Introduction of the first purely digital Radiosonde DFM-90 and Groundstation GK-90 (freely programmable frequency, calibration data stored on EEPROM, etc.)

Introduction of the first „real“ C/A-code differential GPS Radiosonde DFM-90 / DGPS

Introduction of the compact Groundstation GK-90C with GPS module

Introduction of the optimized DFM-97 Radiosonde (highest accuracy, integrated differential GPS)

Renaming to GRAW Radiosondes GmbH & Co. KG

Introduction of the DFM-06 radiosonde (light weight and small size)

  Introduction of groundstation GS-E

Market launch of the DFM-09 radiosonde