Articles | Volume 11, issue 4
Research article
11 Apr 2018
Research article |  | 11 Apr 2018

Evaluating the lower-tropospheric COSMIC GPS radio occultation sounding quality over the Arctic

Xiao Yu, Feiqin Xie, and Chi O. Ao


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Feiqin Xie on behalf of the Authors (23 Jan 2018)  Author's response    Manuscript
ED: Publish subject to technical corrections (05 Feb 2018) by Andrea K. Steiner
AR by Feiqin Xie on behalf of the Authors (14 Feb 2018)  Author's response    Manuscript
Short summary
Atmospheric observations from GPS receiver satellites offer uniform spatial coverage over the Arctic. The GPS profiles sensing deep into the lowest 300 m of the atmosphere only reach 50–60 % in summer but over 70 % in other seasons. The profile uncertainty due to different data centers is within 0.07 % in refractivity, 0.72 K in temperature, and 0.05 g kg-1 in humidity below 10 km. A systematic negative bias of 1 % in refractivity below 2 km is only seen in the summer due to moisture impact.