A new tool named mesosonde was developed by using a large-scale gun for ionospheric and meteorological research purpose. Type "MSL-160" gun has a size of 155 mm in caliber and 13 m in length. An apogeeof 12 kg weight of payload is about 120 km. In comparison with small rockets, one of the main characteristics of the mesosonde is a possibility of production of luminous clouds in every hour or in every half an hour, which would enable us to analyze wave properties in the upper atmosphere. Also as the mesosonde is an economical tool, we are able to get statistical characteristics about the stratosphere dynamics from a large number of launching. Trimethyl aluminum, sodium or barium clouds may be photographed from Syowa Station, Mizuho Station and a temporary observatory near Skarvsnes. Before setting up the "MSL-160" gun at Syowa Station, several flight tests should be performed in Japan.