Tender issueObjective: Perform channel measurements at Wbands by means of a beacon designed developed and launched on a Cubesat platform.Targeted Improvements: Augment ITU-R models for W-band with specific measurements such as i) Tropospheric scintillation at W-band including spectral properties dependence on elevation angles ii)combination of cloud and attenuation effects iii) frequency scalingof
rain attenuation iv) depolarization due to ice (fast XPD without concurrent attenuation).Description: For large broadband satellite networks the number of gateways may be such that the cost of the ground segment exceeds the cost of the satellite even whenusing Q/V band in the gateway feeder link.
Rain attenuation in satellite communication systems operating at Ka band frequencies is more severe than usually experienced at lower frequency bands [5].
Due to its
rain attenuation proportionality properties to range, our short range simulation and measurement results will lead us to estimate the rain effects for longer range as 5G realistic applications.
Impact Of Elevation Angle on
Rain Attenuation In Satellite Communications by Syed Nauman Ahmed and Dr.
Rain attenuation becomes the more dominant factor as the higher frequency and should be considered.
Chandrasekar, 2005: Correction of radar reflectivity and differential reflectivity for
rain attenuation at X band.
In the recent times, due to lack of experimental data for
rain attenuation for most locations in the tropical and subtropical region, the SST has been identified to be a powerful and accurate tool that can produce the necessary statistics of
rain attenuation based on the time series of rain rate R (mm/h) at the site, at any frequency and polarization, and for any slant path above about 10[degrees] whenever a real radio link is not available [10] [12].
Research of seasonal
rain attenuation and radio waves fading in LOS links at 19.5 GHz on South Africa terrain are presented in [5].
The previous research of DSD using data obtained from Kuala Lumpur by Lam [17] focused on investigating the dependence of the
rain attenuation on the DSD and finding the key raindrop diameter for computing specific
rain attenuation, rather than establishing the relationships of DSD in the region with defined equation's fittings and coefficients.
Combining Equations (6) and (7) yields a new equation that obtains the PER according to the
rain attenuation values, as expressed in Equation (8).
It should be noted that the most common reference available in calculating
rain attenuation often uses rain intensity R, probably because of a scarcity of rain drop size data.
Shukla, "
Rain attenuation modeling in the 10-100 GHz frequency using drop size distributions for different climatic zones in tropical India," Progress In Electromagnetics Research B, Vol.
