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Home : Products & Capabilities : Bear Lake Observatory : Experiments : Dynasonde

Related Information

Link to contact information AIS summary plots

Link to contact information Dynasonde at Tromsø, Norway

Link to contact information GRASP plots of Halley data

Link to inonosphere measurements Ionosphere Measurements

Link to mesopheric data Mesospheric Data

Dynasonde

The Dynasonde is a fully digitally-controlled HF radar system used to make measurements of both the mesosphere and lower thermosphere as well as the lower and upper ionosphere (Grubb, 1978).

Two phase-coherent receivers are connected to a four element spaced interferometer array; a 10 kW transmitter is used for transmission into a simple travelling-wave dipole antenna.

In addition to Bear Lake (42°N), dynasondes are deployed at Halley (76°S), Tromsø (69°N) and Lycksele (64°N).

At BLO the dynasonde is used to conduct synoptic measurements of the terrestrial ionosphere when operated in one of several "ionosonde" modes. It is also configued to acquire mesospheric data in the region between 60 and 115 km using a MF Radar technique called Imaging Doppler Interferometry. The mesospheric data provide information regarding the various tidal modes of the mesosphere and also detect a variety of longer wave oscillations, such as planetary (3-30 day) or quasi-two day waves.

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