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Synergy of Raman lidar and modeled temperature for relative humidity profiling: assessment and uncertainty analysis
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Article
Open AccessRelative humidity (RH) profiling using Raman lidars requires simultaneous range-resolved temperature and pressure data that are not always available. We propose and assess a method based on the use of a locally retrieved ... -
Phase and baseline calibration for microwave interferometric radiometers sing beacons
(Institute of Electrical and Electronics Engineers (IEEE), 2020-08-01)
Article
Open AccessThe relative phase and amplitude calibration between individual receiving elements are one of the key challenges in interferometric microwave radiometry. For monolithic interferometers, for example the Microwave Imaging ... -
Generic performance simulator of spaceborne GNSS-Reflectometer for land applications
(Institute of Electrical and Electronics Engineers (IEEE), 2020-01-01)
Article
Open AccessNowadays, the space missions employing the global navigation satellite system reflectometry (GNSS-R) are UK TDS-1, NASA CYGNSS, and the Chinese BuFeng-1A/B twin satellites, part of the first Chinese global navigation ... -
Assessing LoRa for satellite-to-Earth communications considering the impact of Ionospheric Scintillation
(Institute of Electrical and Electronics Engineers (IEEE), 2020-09-07)
Article
Open AccessSince the appearance of 5G, Internet of Things (IoT) has gained an increased interest, with multiple technologies emerging and converging to cover different user needs. One of the biggest challenges today is to have global ... -
Calculation of the overlap function and associated error of an elastic lidar or a ceilometer: Cross-comparison with a cooperative overlap-corrected system
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-05)
Article
Open AccessThis paper establishes the relationship between the signal of a lidar system corrected for the incomplete overlap effect and the signal of another lidar system or a ceilometer for which the overlap function is unknown. ... -
L-band vegetation optical depth estimation using transmitted GNSS signals: Application to GNSS-reflectometry and positioning
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-08-01)
Article
Open AccessAt L-band (1–2 GHz), and particularly in microwave radiometry (1.413 GHz), vegetation has been traditionally modeled with the τ-ω model. This model has also been used to compensate for vegetation effects in Global Navigation ... -
An EARLINET early warning system for atmospheric aerosol aviation hazards
(European Geosciences Union (EGU), 2020-09-15)
Article
Open AccessA stand-alone lidar-based method for detecting airborne hazards for aviation in near real time (NRT) is presented. A polarization lidar allows for the identification of irregular-shaped particles such as volcanic dust and ... -
On the correlation between GNSS-R reflectivity and L-band microwave radiometry
(Institute of Electrical and Electronics Engineers (IEEE), 2016-12)
Article
Open AccessThis work compares microwave radiometry and global navigation satellite systems-reflectometry (GNSS-R) observations using data gathered from airborne flights conducted for three different soil moisture conditions. Two ... -
A novel dissemination protocol to deploy opportunistic services in federated satellite systems
(Institute of Electrical and Electronics Engineers (IEEE), 2020-08-03)
Article
Open AccessThe Earth Observation community is demanding new satellite applications that cover the need of monitoring different areas with high spatial resolution and short revisit times. These applications will generate huge amounts ... -
Single-pass soil moisture retrievals using GNSS-R: lessons learned
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-06-01)
Article
Open AccessIn this paper, an algorithm to retrieve surface soil moisture from GNSS-R (Global Navigaton Satellite System Reflectometry) observations is presented. Surface roughness and vegetation effects are found to be the most ... -
Implementation of a testbed for GNSS-R payload performance evaluation
(Institute of Electrical and Electronics Engineers (IEEE), 2020-05-28)
Article
Open AccessThe functional performance of space-borne instruments must be validated on ground before and after satellite integration. The effects of radio-frequency interference are also becoming more important, even in protected bands ... -
Application and testing of the extended-Kalman-filtering technique for determining the planetary boundary-layer height over Athens, Greece
(2020-01-01)
Article
Restricted access - publisher's policyWe investigate the temporal evolution of the planetary boundary-layer (PBL) height over the basin of Athens, Greece, during a 6-year period (2011–2016), using data from a Raman lidar system. The range-corrected lidar signals ...
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