J. Space Weather Space Clim.
Volume 4, 2014
|Number of page(s)||10|
|Published online||25 September 2014|
Statistics of ionospheric disturbances and their correlation with GNSS positioning errors at high latitudes
Norwegian Mapping Authority, Norway
* Corresponding author: email@example.com
Accepted: 26 August 2014
The Rate Of TEC Index (ROTI) is a commonly used measure of ionospheric activity. ROTI values have been computed every 5 min for the year 2012, for 10 receivers at latitudes from 59° to 79° North. We present the results in geomagnetic coordinates, showing that elevated ROTI values occur mainly in the cusp and nightside auroral oval regions. Elevated ROTI values are more common in the cusp, but in the nightside auroral oval they are stronger.
To investigate the relation to positioning errors, receiver coordinates were computed using the GIPSY software, for the same receivers and time resolution. We found that there is a strong positive correlation between Precise Point Positioning (PPP) error and ROTI for receivers that are affected by space weather. The 3D position error increases exponentially with increasing ROTI.
A statistical analysis presents also the risk of having several satellites observing enhanced ROTI values simultaneously, showing that this risk is greater at high latitudes.
Key words: Space weather / Positioning system / Ionosphere (auroral) / Statistics and probability
© K.S. Jacobsen & M. Dähnn, Published by EDP Sciences 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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