Abstract
AbstractRino et al. (2019, https://doi.org/10.1029/2019JA026958) has recently explored the effects of refractive (total electron content [TEC]) and stochastic/diffractive (scintillation) on the GPS carrier phase observable, with the intent to show that the scintillation portion of the total ionospheric effect on the carrier phase is negligible. A major portion of the manuscript is based on “stochastic TEC,” a new term that is not well defined by the authors. If the authors meant this as variations in the phase that does not scale with carrier frequency, then it is not TEC at all. One cannot measure TEC, using phase, if the variations do not scale with frequency. In the data‐driven portion of the paper, there are claims and assumptions made that are incorrect, or not well explained. These include the claim that the TEC and scintillation portions of the carrier phase observable cannot be separated, but previous work has shown that it is possible (McCaffrey & Jayachandran, 2019, https://doi.org/10.1029/2018ja025759); the use of the C/N0 in calculating the S4 scintillation index, despite C/N0's sensitivity to the phase and amplitude of the carrier; and the negligence of the higher‐order effects of the TEC calculation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
