Publication Date:
2022-05-06
Description:
This paper discusses the occurrence of Global Positioning System (GPS) loss of lock events
obtained by considering total electron content (TEC) measurements carried out by the three satellites
of the European Space Agency Swarm constellation from December 2013 to December 2020, which
represents the longest dataset ever used to perform such an analysis. After describing the approach
used to classify a GPS loss of lock, the corresponding occurrence is analyzed as a function of latitude,
local time, season, and solar activity to identify well-defined patterns. Moreover, the strict relation
of the occurrence of the GPS loss of lock events with defined values of both the rate of change of
electron density index (RODI) and the rate of change of TEC index (ROTI) is highlighted. The scope
of this study is, on one hand, to characterize the background conditions of the ionosphere for such
events and, on the other hand, to pave the way for their possible future modeling. The results shown,
especially the fact that GPS loss of lock events tend to happen for well-defined values of both RODI
and ROTI, are of utmost importance in the light of Space Weather effects mitigation
Description:
Published
Description:
2209
Description:
2A. Fisica dell'alta atmosfera
Description:
JCR Journal
Keywords:
GPS loss of lock
;
RODI
;
ROTI
;
ionospheric irregularities
;
Swarm satellite
;
Space Weather
;
01.02. Ionosphere
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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