@article{Themens2015a,
author = "D. R. Themens and P. T. Jayachandran and R. B. Langley",
title = "The nature of GPS differential receiver bias variability: An examination in the polar cap region",
year = 2015 ,
journal = "J. Geophys. Res.",
volume = 120,
pages = "8155-8175",
keywords = "amisr, rbo, risrn",
doi = "10.1002/2015JA021639"
}