Ustav Fyziky Atmosfery AV CR (IAP)

Infrastructure or equipment
Currently at the IAP a number of specific interdisciplinary measurements and investigations are carried out. The IAP team operates ionosondes at the Pruhonice observatory since 1958 (digisonde since 2004). In 2009 it was upgraded to a DPS4D and all real time data and value added products are accessible from In addition to the routine ionospheric sounding, the Pruhonice DPS4D performs oblique drift measurements in synchronous operation with selected DPS4D within the European region for the detection of Doppler shift and angle of arrival of perturbations inferred by TIDs. The dual frequency GPS receiver is also in operation at the observatory.
The IAP team designed, constructed and put into operation the international Continuous Doppler Sounding System (CDSS) co-located with ionosonde and microbarographs. The CDSS is unique in the world because of the continuous sounding and the uniform instrumentation including HW and SW. It enables permanent monitoring of lower ionosphere above different locations and gives information on the activity of atmospheric waves of different origin and their influence on ionosphere. Recently the team operates CDSSs in the Czech Republic, South Africa, Argentina and Taiwan.
In 2012 the IAP put into operation a powerful high capacity server and back up PC, which have been adapted for the mirroring of the international Digital Ionosonde Database (DIDBase), located in Lowell, USA. The machine enables users in the Czech Republic (researches, students, commercial users), as well as European ionospheric community to download requested ionospheric data in much shorter time, when comparing to the Lowell link. (firebirdsql:// All data, essential for analysis of the atmospheric wave dynamics and state of ionosphere (ionosonde data – ionograms obtained from worldwide ionospheric stations, more than 60-years-long ionospheric sounding archive from Pruhonice observatory, ionospheric drift data and skymaps; data of the CDSS network – spectrograms (rough and processed), GPS data-TEC values; and microbarograph data), are archived at the mirroring facility.

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