@article{XiongStollePark2018,
  author    = {Chao Xiong and Claudia Stolle and Jaeheung Park},
  title     = {Climatology of GPS signal loss observed by Swarm satellites},
  journal   = {Annales geophysicae},
  volume    = {36},
  number    = {2},
  pages     = {679 -- 693},
  doi       = {10.5194/angeo-36-679-2018},
  year      = {2018},
}