The effects of the liquid water presence on the NDSA method for the measurement of the tropospheric water vapor along LEO-LEO satellite links

Fabrizio Cuccoli; Luca Facheris

doi:10.1117/12.626997

1 November 2005 The effects of liquid water on the NDSA method for measuring tropospheric water vapor along LEO-LEO satellite links

Fabrizio Cuccoli, Luca Facheris

Author Affiliations +

Proceedings Volume 5979, Remote Sensing of Clouds and the Atmosphere X; 59790P (2005) https://doi.org/10.1117/12.626997
Event: SPIE Remote Sensing, 2005, Bruges, Belgium

Abstract

The NDSA (Normalized Differential Spectral Absorption) method has been proposed for estimating the total content of water vapor (IWV, Integrated Water Vapor) along a tropospheric propagation path between two Low Earth Orbit (LEO) satellites. This method requires a transmitter onboard the first LEO satellite and a receiver onboard the second one. It is based on the simultaneous measurement of the total attenuation at two relatively close frequencies in the Ku/K bands, and on the estimate of a parameter referred to as 'spectral sensitivity'. This approach is potentially able to emphasize the water vapor contribution, to cancel out all spectrally flat unwanted contributions and to limit the impairments due to tropospheric scintillation. The objective of this paper is to analyze the effects of liquid water presence along the propagation LEO-LEO link on the NDSA approach. Results are based on computer simulation and account for different frequency carriers in the 15-30 GHz range and for any value of liquid water content along the propagation path at 3 km tangent altitude.

Citation Download Citation

Fabrizio Cuccoli and Luca Facheris "The effects of liquid water on the NDSA method for measuring tropospheric water vapor along LEO-LEO satellite links", Proc. SPIE 5979, Remote Sensing of Clouds and the Atmosphere X, 59790P (1 November 2005); https://doi.org/10.1117/12.626997

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