1. Research on empirical correction models of GPS Block IIF and BDS satellite inter-frequency clock bias

   • Xiaopeng Gong
   • Shengfeng Gu
   • Jingnan Liu

   Original Article 06 March 2020 Article: 36

   

2. Correction to: Methodology to estimate ionospheric scintillation risk maps and their contribution to position dilution of precision on the ground

   • Alexandra Koulouri
   • Nathan D. Smith
   • Biagio Forte

   Correction Open access 05 March 2020 Article: 35

3. Using real polar ground gravimetry data to solve the GOCE polar gap problem in satellite-only gravity field recovery

   • Biao Lu
   • Christoph Förste
   • Tangting Wu

   Original Article 25 February 2020 Article: 34

   

4. IAG Newsletter

   • Gyula Tóth

   IAG Newsletter 22 February 2020 Article: 33

   

5. IGS real-time service for global ionospheric total electron content modeling

   • Zishen Li
   • Ningbo Wang
   • Alexis Blot

   Original Article 18 February 2020 Article: 32

   

6. Robust M estimation for 3D correlated vector observations based on modified bifactor weight reduction model

   • Ling Yang
   • Yunzhong Shen

   Original Article 17 February 2020 Article: 31

   

7. A line integral approach for the computation of the potential harmonic coefficients of a constant density polyhedron

   • Olivier Jamet
   • Dimitrios Tsoulis

   Original Article 17 February 2020 Article: 30

   

8. Smoothing and predicting celestial pole offsets using a Kalman filter and smoother

   • Jolanta Nastula
   • T. Mike Chin
   • Małgorzata Wińska

   Original Article Open access 15 February 2020 Article: 29

   

9. A risk evaluation method for deformation monitoring systems

   • S. Zaminpardaz
   • P. J. G. Teunissen
   • C. C. J. M. Tiberius

   Original Article Open access 15 February 2020 Article: 28