Blar i forfatter "Coster, A. J."

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    • Gaussian Markov random field priors in ionospheric 3D multi-instrument tomography 

      Norberg, J.; Vierinen, Juha; Roininen, L; Orispää, M.; Kauristie, K; Rideout, W.; Coster, A. J.; Lehtinen, M (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-22)
      In ionospheric tomography, the atmospheric electron density is reconstructed from different electron density related measurements, most often from ground-based measurements of satellite signals. Typically, ionospheric tomography suffers from two major complications. First, the information provided by measurements is insufficient and additional information is required to obtain a unique solution. ...

    • GNSS Observations of Ionospheric Variations During the 21 August 2017 Solar Eclipse 

      Coster, A. J.; Goncharenko, Larisa; Zhang, Shun-Rong; Erickson, P. J.; Rideout, William; Vierinen, Juha (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-20)
      On 21 August 2017, during daytime hours, a total solar eclipse with a narrow ∼160 km wide umbral shadow occurred across the continental United States. Totality was observed from the Oregon coast at ∼9:15 local standard time (LST) (17:20 UT) to the South Carolina coast at ∼13:27 LST (18:47 UT). A dense network of Global Navigation Satellite Systems (GNSS) receivers was utilized to produce total ...