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Vaisala RS92 radiosonde used in climate research

2010

Vaisala RS21 radiosonde, serial no 624957-8, for 400 MH3 Meteorological frequency band

1971

Variable-frequency radiosonde, by Vilho Vaisala, 1935

1935

Vaisala radiosonde, 1935

1935

Street in Helsinki

circa 1938

Vaisala Oy aerial drop-sonde, Helsinki, Finland, 1997

1997

Vaisala RS21 radiosonde

1971
Radiosonde, Vaisala RS80 type, one unwrapped, one in sealed foil container

Vaisala RS80 type radiosonde,

Complete Vaisala radiosonde type RS16, supplied by Vaisala (UK) Ltd, Britain, made by Vaisala Oy, Helsinki, Finland, 1970

Vaisala radiosonde, 1970

1970
Vaisala RS21 radiosonde, serial no 624957-8, for 400 MH3 Meteorological frequency band, in two components, with spare battery in sealed pack, by Vaisala Oy, Helsinki, Etelä-Suomen Lääni, Finland, 1971

Vaisala RS21 radiosonde

1971