Radio Aeronomy at Onsala Space Observatory Peter Forkman

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Presentation transcript:

Radio Aeronomy at Onsala Space Observatory Peter Forkman

Infrared OH-airglow instrument

Pressure broadening Sky switched H 2 O at 22 GHzFrequency switched CO at 115 GHz

CO at GHz

CO receiver

H 2 O at 22.2 GHz

T cold can be estimated assuming constant T rec

Sky as cold load

T eff is estimated from radiosonde data Traditionally T eff = 0.95T ground

H 2 O at 22.2 GHz

21/31.4 GHz radiometer

Syntetic spectra GHz

Stand alone calibration using skydip method

Optical depth from skydip and dual channel radiometer

Elevation and tropospheric opacity change at 22 GHz

Radio Aeronomy at Onsala Space Observatory Peter Forkman