Research Repository

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Analysis of the regional ionosphere at low latitudes in support of the Biomass ESA Mission (2018)
Journal Article
Alfonsi, L., Povero, G., Spogli, L., Cesaroni, C., Forte, B., Mitchell, C. N., …Floury, N. (2018). Analysis of the regional ionosphere at low latitudes in support of the Biomass ESA Mission. IEEE Geoscience and Remote Sensing Letters, 56(11), 6412 - 6424. doi:10.1109/TGRS.2018.2838321

Biomass is a spaceborn polarimetric P-band (435 MHz) synthetic aperture radar (SAR) in a dawn-dusk low Earth orbit. Its principal objective is to measure biomass content and change in all the Earth's forests. The ionosphere introduces the Faraday rot... Read More

Estimation and analysis of multi-GNSS differential code biases using a hardware signal simulator (2018)
Journal Article
Ammar, M., Aquino, M., Vadakke Veettil, S., & Andreotti, M. (2018). Estimation and analysis of multi-GNSS differential code biases using a hardware signal simulator. GPS Solutions, 22, doi:10.1007/s10291-018-0700-7. ISSN 1080-5370

In ionospheric modeling, the differential code biases (DCBs) are a non-negligible error source, which are routinely estimated by the different analysis centers of the International GNSS Service (IGS) as a by-product of their global ionospheric analys... Read More

Mitigation of ionospheric effects on GNSS positioning at low latitudes (2017)
Journal Article
Park, J., Vadakke Veettil, S., Aquino, M., Yang, L., & Cesaroni, C. (2017). Mitigation of ionospheric effects on GNSS positioning at low latitudes. Navigation, 64(1), doi:10.1002/navi.177. ISSN 2161-4296

Ionospheric conditions at low latitudes are extremely harsh due to the frequent occurrence of scintillation and the presence of strong TEC gradients. For this study, the São Paulo state region in Brazil is chosen as a test area. This study presents a... Read More

Tuning a Kalman filter carrier tracking algorithm in the presence of ionospheric scintillation (2016)
Journal Article
Susi, M., Andreotti, M., Aquino, M., & Dodson, A. (in press). Tuning a Kalman filter carrier tracking algorithm in the presence of ionospheric scintillation. GPS Solutions, 21(3), doi:10.1007/s10291-016-0597-y. ISSN 1080-5370

Strong ionospheric electron content gradients may lead to fast and unpredictable fluctuations in the phase and amplitude of the signals from Global Navigation Satellite Systems (GNSS). This phenomenon, known as ionospheric scintillation, is capable o... Read More

Statistics of ionospheric scintillation occurrence over European high latitudes (2014)
Journal Article
Sreeja, V., & Aquino, M. (2014). Statistics of ionospheric scintillation occurrence over European high latitudes. Journal of Atmospheric and Solar-Terrestrial Physics, 120, doi:10.1016/j.jastp.2014.09.003. ISSN 1364-6826

Rapid fluctuation in the amplitude and phase of transionospheric radio signals caused by small scale ionospheric plasma density irregularities is known as scintillation. Over the high latitudes, irregularities causing scintillation are associated wit... Read More