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Kalendarium 70-lecia Radia Polonia

Makowski W.

Wiadomości Elektrotechniczne

2006

nr 7

41-47

Przedstawiono kalendarium 70-lecia Radia Polonia, widziane przez pryzmat wydarzeń technicznych i organizacyjnych.

The 70 years diary of Polonia radio station is presented, as seen throughout technical and organizational events.

Kalendarium 80-Ieda Polskiego Radia

Makowski W.

Wiadomości Elektrotechniczne

2005

nr 6

3--10

Przedstawiono kalendarium 80 lat Polskiego Radia, widziane przez pryzmat wydarzeń technicznych i organizacyjnych.

The paper presents 80 years of Polish Radio history through technical and organizational events.

Effects of the orbital uncertainties on atmosphere profiles retrieved with the GNSS radio occultation technique

Benedetto C., Gatti M., Vespe F.

Reports on Geodesy

2003

z. 2/65

203-211

In the last decade the use of GPS radio occultation technique (GPS RO) bas been deeply and widely investigated for retrieving physical and chemical parameters of Earth atmosphere. The technique proved to be particularly precise in retrieving temperature profiles with an high vertical resolution (1 km) and accuracy (1st1K). The use of such technique for numerical weather prediction is the most challenging application. In fact a good knowledge of the orbits, in turn of the LEO satellite with the GPS receivers and the GPS satellites, is needed. Another severe requirement is that such orbits must be provided in Near-Real-Time (1 hour). Such severe requirement limits dramatically the precision of the estimated- predicted orbits. We will investigate in the present work the sensitiveness of the atmosphere profiles, namely pressure, temperature and humidity, to the LEO and GPS satellites orbital uncertainties. In the second part we will discuss about the requirements and specs to be fulfilled by the estimates of the orbits to assure a meteorological service based on the GNSS radio occultation technique.