An improved weather-forecast-based link-budget design technique for space-to-Earth links is described. The aim the stochastic optimization of both transmission symbol rate and received signal-to-noise ratio. proposed radiometeorological operations prediction (RadioMetOP) model takes into account forecast uncertainty by a space-time ensemble method exploiting temporal evolution predicted variables over weather-forecast spatial grid. unique possibility testing validating RadioMetOP presented,...

Sun-tracking (ST) microwave radiometry is a technique where the Sun used as signal source and it here rigorously summarized. The antenna noise temperature of ground-based radiometer measured by alternately pointing toward-the-Sun off-the-Sun while tracking along its diurnal ecliptic. During clear sky brightness disk emission at K Ka band in unexplored millimeter-wave frequency region V W can be estimated adopting different techniques. Using unique dataset collected during 2015 through ST...

Sun-tracking (ST) microwave radiometry is a ground-based technique where the Sun used as beacon source. The atmospheric antenna noise temperature measured by alternately pointing toward-the-Sun and off-the-Sun according to beam switching strategy. By properly developing an ad hoc processing algorithm, we can estimate path attenuation in all-weather conditions. A theoretical framework proposed describe ST radiometric measurements evaluate overall error budget. Two different techniques, based,...

The weather-forecast based Radio Meteorological Operation Planner (RMOP) model for the dynamical link-budget design in satellite communications at Ka-band is described and validated. For first time, actual received data from a deep-space mission (Hayabusa2 JAXA supported by ESA) were available operational tests. RMOP-predicted parameters delivered real-time before each scheduled transmission period. After transmission, measured ground stations exploited RMOP validation. data-volume actually...

This paper aims at improving and assessing a previously developed technique to predict data volume transfer during deep-space satellite communication links Ka- X -band (where the Earth's atmosphere affects propagating signals). The proposed exploits weather forecast (WF) model atmospheric state radiative convert into radiopropagation variables. latter are used design link budget maximize transferred data-volume. WF-based attenuation as random variable related statistic of transmission error...

In this work, we propose a model for the probability density function (pdf) of elevation angle and pdf attenuation conditioned to at W-band in all weather conditions. The proposed models are suitable retrieve total variable application non-geostationary (NGEO) satellite communication (SatCom) links W-band. models, based on generalized extreme value (GEV) distribution, were developed tested exploiting Sun-tracking (ST) microwave radiometer (MWR) measurements available from two independent...

The objective of this paper is to characterize the atmospheric radiometeorological parameters (optical thickness and brightness temperature) at centimeter millimeter waves. To aim, we have exploited two radiative transfer models (RTMs): a three-dimensional model (3D-RTM), driven by numerical weather forecasts, stochastic one-dimensional (1-D) (1D-RTM), fed synthetic clouds dataset. We compared simulations with measurements from ground-based microwave radiometers: profiler Sun-tracking...

This work describes the RadioMetOP (RadioMeteorological Operation Planner tool) model for optimization of deep-space satellite links. allows exploiting dynamical statistics (i.e., customized on specific day pass) atmospheric attenuation and brightness temperature derived coupling weather-forecast radiopropagation models. has successfully passed feasibility validation phases demonstrating a capability providing an extra daily data-volume up to 300% with respect classical link-budget...

Sun-tracking microwave (ST-MW) radiometry is a ground-based technique where the Sun used as beacon source to infer atmospheric path attenuation in all-weather conditions. ST-MW shows an appealing potential for overcoming difficulties perform satellite-to-Earth radiopropagation experiments unexplored millimeter-wave and submillimeter-wave frequency region, especially experimental data from receivers are not available. The theoretical framework, ad hoc procedures processing will be presented,...

Sun-tracking millimeter-wave radiometry exploits the Sun as a beacon source by tracking it along its diurnal ecliptic. The atmospheric brightness temperature is measured alternately pointing toward-the-Sun and off-the-Sun according to ad hoc switching strategy. By properly developing retrieval algorithm, we can estimate path attenuation in all-weather conditions. Langley method, based on elevation-scanning, proposed equivalent of Sun, which critical step for precipitation extinction...

Sun-Tracking (ST) is a novel ground-based microwave radiometric technique that allows the retrieval of slant-path atmospheric attenuation in all-weather conditions as well estimation Sun brightness temperature. This work proposes refinement procedure ST based on taking into account Sun's angular size variability throughout year. We have obtained reduction up to more than 50% standard deviation estimated On other hand, we demonstrated approximation constant value for size, strongly limits...

An anomaly detection and estimation technique, using a pixel-based modified version of the Kalman temporal filter, is presented. To detect anomalies observed variable, proposed Kalman-based masking (KAM) algorithm relies on background state models expected measurement cycle each pixel in nominal (abnormal) conditions. If significantly deviates from its value as predicted by priori state, an identified. The KAM also provides estimate scenario, exploiting previous filter states. product...

Sun-tracking microwave radiometry is an effective technique aimed at estimating the tropospheric attenuation in all-weather conditions by using Sun emission as equivalent beacon source. Though such definitely represents interesting alternative to Earth-space electromagnetic propagation experiments, especially frequency region beyond 50 GHz for which space-borne beacons are hardly currently available, its application not trivial, mainly because of issues arising from need precisely pointing...

Abstract. Ground-based microwave radiometer (MWR) observations of downwelling brightness temperature (TB) are commonly used to estimate atmospheric attenuation at relative transparent channels for radio propagation and telecommunication purposes. The is derived from TB by inverting the radiative transfer equation with a priori knowledge mean radiating (TMR). TMR usually estimated either time-variant site climatology (e.g., monthly average computed thermodynamical profiles) or...

This work describes the operative experimentation of a weather-forecast based satellite link-budget approach at Ka-band (named RMOP) during 6 months collaboration with JAXA and ESA within Hayabusa-2 deep-space mission. Operative design was performed 24 hours before each scheduled transmission window providing optimized symbol-rates (to adopt transmission) corresponding expected signal-to-noise ratio values allowing real-time monitoring predicted atmospheric channel status. The comparison...

This work aims at verifying an innovative approach for link-design optimization of deep-space missions working Ka band. The presented exploits a weather forecast (WF) model coupled with radiopropagation to maximize data-transfer during Ka-band downlink transmission. First, we exploit radiosounding data tune the WF on geographical site interest. As second step, use microwave radiometric measurements verify both and models. A final goal is obtained applying WF-based optimize link then...

A multispectral temporal-based remote sensing technique based on a modified Kalman filter is presented for clear-air detection by using Geostationary visible-infrared radiometric passive measurements. The estimate relies model of the daily measurement cycle considered pixel in clear-sky conditions. If significantly deviates from predicted value, an anomaly detected, which interpreted as non-clear air scenario. add-on value such approach to be able provide a-priori estimates, making algorithm...

In this work we propose a model chain for the prediction of tropospheric channel downlink interplanetary missions operating above Ku band We show validation and online operation model-chain, already tested within feasibility study applied to BepiColombo mission Mercury (operated by European Space Agency), through Hayabusa2 cross-support data provided Japan Aerospace Exploration Agency (JAXA). The model-chain is composed three modules. A weather forecast module atmospheric state expected...

This work aims at characterizing the behavior of suspended clouds in terms atmospheric path attenuation. Well-known radiative models are adopted to provide an estimate equivalent clear-air attenuation contribution, exploiting surface weather measurements and making several assumptions on their vertical stratification over troposphere. However, contribution due non-precipitating cannot be easily modelled by only using in-situ measurements, i.e., boundaries not able enough information about...

This work provides a weather-forecast-based technique (named RadioMetOP) for the stochastic optimization of Ka-band satellite links. The approach is given by space-time ensemble obtained exploiting temporal and spatial evolution weather-forecast model. minimizes doublepenalty error typically connected to models allows take into account forecast uncertainty directly related multiplicity possible meteorological scenarios. For first time, RadioMetOP can be verified thanks availability data from...

Sun-tracking microwave radiometry (STMW) is a ground-based technique where the Sun used as beacon source to infer atmospheric path attenuation in all-weather conditions. STMW shows an appealing potential for overcoming difficulties perform satellite-to-Earth radiopropagation experiments unexplored millimeterwave and submillimeter-wave frequency region, especially experimental data from receiver are not available. The theoretical framework ad hoc procedures processing developed last 5 years...