@article{Watson2018a, author = "C. Watson and R. B. Langley and D. R. Themens and A. W. Yau and A. D. Howarth and P. T. Jayachandran", title = "Enhanced Polar Outflow Probe ionospheric radio occultation measurements at high latitudes: Receiver bias estimation and comparison with groundā€based observations", year = 2018 , journal = "Radio Science", publisher = "American Geophysical Union", volume = 53, keywords = "pfisr, risrn", doi = "10.1002/2017RS006453" }