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 scaling of rain attenuation
iv) depolarization due to ice (fast XPD without concurrent attenuation).
Additional features of Gilat's cellular backhaul solution include sophisticated support of automatic uplink power control that compensates for rain attenuation
without additional consumption of space segment, as well as strong QoS and policing, ensuring that voice calls will commence at high quality even during periods of congestion due to excessive data traffic.
His topics are radio waves and the troposphere, propagation, reflection and interference, refraction and path delay, absorption, rain attenuation
, and attenuation by hydrometeors other than rain.
When it is raining, signal level fluctuation (known as scintillation) can change together with rain attenuation affecting signal level.
Considering a clear sky (with or without rain), all data having a spike regarding extreme amplitude values due to rain attenuation has been removed by comparing it to rain gauge data values.
Additionally, this new design for fixed wireless offers narrow beamwidth which, combined with advances in power control, allows equipment to automatically adjust power over a large range to account for rain attenuation
, maximize frequency re-use, and provide a means to reach a greater number of locations.
Market restraints include launch failures and risks associated with satellite deployment, financial wherewithal, the currency crisis, competition from terrestrial and wireless technologies, and physical conditions such as rain attenuation
and propagation delay.
The link budget facilities employ rain attenuation and atmospheric absorption prediction modeling even for low elevations.
01 values and rain attenuation for a selected country
Features included: - Digital link budgets for Satellite TV, SNG, radio and data - FM link budgets - Sun outage prediction (single site and satellite) - Sun outage batch file handling (multiple sites or multiple satellites) - Antenna aiming - Dual/multi feed positioning - Dish sizing - Polar mount alignment - EIRP, SFD and G/T map viewer - Automatic magnetic variation calculation - Solar transit times - Off-axis gains - Rain attenuation
model (ITU-R P.
The rain attenuation
chapter features a summary of how to apply the ITU and Crane rain models Satellite communication chapter provides the details of earth-space propagation analysis including rain attenuation
, atmospheric absorption, path length determination and noise temperature determination.