Use and Accuracy of Numerical Weather Predictions to Support EM Wave Propagation Experiments

Quibus, Laurent; Luini, Lorenzo; Riva, C.; Vanhoenacker‐Janvier, Danielle

doi:10.1109/tap.2019.2913785

Cited by 13 publications

(13 citation statements)

References 28 publications

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“…Radiometric measurements with high time resolution (∼ 4 s) show rapid fluctuations for lower values of ICLWC that ERA-5 or RAOBS data with much coarser time resolution do not capture. When compared to RAOBS and ERA-5, radiometric cloud attenuation measurements give a higher percentage occurrence of lower cloud attenuation [9]. In this regard it may be mentioned that current radiometric measurements yield low ICLWC values (less than 0.5 mm) for 91 % of time compared to 85% for RAOBS and 80% for ERA-5.…”

Section: Acl(f)=aclwc(f)iclwcmentioning

confidence: 88%

“…The processing of satellite beacon signals enables the retrieval of the excess attenuation due to rain. The total attenuation necessitates an evaluation of the attenuation due to gases and clouds, called non-rainy attenuation [9], [10]. The latter can be obtained from a co-located radiometer with the same elevation and azimuth as the beacon receiver antenna.…”

Section: Introductionmentioning

confidence: 99%

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Non-Rainy Attenuation Over Earth-Space Paths at Tropical and Temperate Sites Using Meteorological Data and NWP Products

et al. 2021

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A long-term investigation of the attenuation in non-rainy conditions has been carried out, for a tropical and a temperate location, using meteorological data and NWP (Numerical Weather Prediction) products during the period 2011-2015. The results show that ERA-5 full profiles are appropriate to estimate non-rainy attenuation in lieu of radiometric or radiosonde observations. Simpler regression-based methods are established. A new formulation for oxygen attenuation is introduced, which only requires surface temperature and pressure. Mass absorption coefficients are used for water vapour and cloud attenuation. Simpler regression-based approaches are then validated. This study would facilitate the planning of global mobile satellite communication systems.

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Section: Acl(f)=aclwc(f)iclwcmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Non-Rainy Attenuation Over Earth-Space Paths at Tropical and Temperate Sites Using Meteorological Data and NWP Products

et al. 2021

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“…Characteristic integrated values for wind speed (WS) and turbulence strength (C N 2 ), derived from the European Center for Medium Weather Forecast (ECMWF) database (Molteni et al, 1996), can be considered as proxy parameters for the presence of turbulent eddies in the lower portions of the atmosphere, which affect the accuracy of the TDCS calibrations (Lasagni Manghi et al, 2019). Both values of wind speed and turbulence strength were provided by UCL (Quibus et al, 2019) and were derived by averaging over time the local vertical profiles from the ECMWF data set that fell within the tracking pass interval. The obtained vertical profiles were then spatially averaged from ground level to a height of 1 km above the surface.…”

Section: Testbed Summary and Data Availabilitymentioning

confidence: 99%

Performance Characterization of ESA's Tropospheric Delay Calibration System for Advanced Radio Science Experiments

et al. 2021

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Precise radiometric tracking is of key importance during operations of interplanetary missions and for advanced radio science applications. Radio science research performed on deep space missions like Cassini, Juno, BepiColombo, and the upcoming JUICE mission, rely on a combination of X and K a band radio links to mitigate the dispersive effects of propagation through interplanetary plasma, solar corona, and Earth ionosphere, leaving tropospheric delay as one of the main error contributors to Doppler and ranging measurements.To meet the demanding requirements of BepiColombo's Mercury Orbiter Radio science Experiment (MORE) (Iess et al., 2021) and JUICE's Geodesy and Geophysics of Jupiter and the Galilean Moons (3 GM) radio science experiment (Cappuccio et al., 2020), in terms of radiometric tracking accuracy and end-toend stability of the Doppler signals, ground-based microwave radiometers (MWR) are deemed as the most appropriate instruments for tropospheric delay calibration (Iess et al., 2009).Microwave radiometers have been extensively used in the past decades for the correction of tropospheric induced delay in astrometric and geodetic observations using very large base interferometry (VLBI) (Nikolic et al., 2013;Roy et al., 2007). However, their application to deep space radiometric tracking was originally introduced by the Jet Propulsion Laboratory (JPL) to support the Cassini radio science experiments, with the development and installation of two dedicated high-stability water vapor radiometers at the Goldstone deep space communication complex in California (

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“…Additionally, the NAS can be employed to set the clear sky level (recover the attenuation in non-rainy conditions) in place of the radiometer [19].…”

Section: Numerical Atmospheric Simulatormentioning

confidence: 99%

Preparation of a CubeSat LEO radio wave propagation campaign at Q and W bands

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Martin-Polegre

Lasheras

et al. 2020

Satell Commun Network

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Due to the congestion of the spectrum and the need for wider bandwidths, ultra-high throughput satellites (UHTS) are moving towards the use of higher frequency bands (Q/V and W band). These frequencies are however severely impaired by atmospheric phenomena causing attenuation, scintillation and depolarization and compromising the quality of service (QoS). In order to study the Earth-space link, several experimental campaigns have been performed up to the Q band with geostationary (GEO) satellites. This paper introduces a new propagation experiment which will extend the characterization of the Earth-space channel up to the W band and low Earth orbits (LEO).

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Use and Accuracy of Numerical Weather Predictions to Support EM Wave Propagation Experiments

Cited by 13 publications

References 28 publications

Non-Rainy Attenuation Over Earth-Space Paths at Tropical and Temperate Sites Using Meteorological Data and NWP Products

Non-Rainy Attenuation Over Earth-Space Paths at Tropical and Temperate Sites Using Meteorological Data and NWP Products

Performance Characterization of ESA's Tropospheric Delay Calibration System for Advanced Radio Science Experiments

Preparation of a CubeSat LEO radio wave propagation campaign at Q and W bands

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