Publication Date:
2022-06-20
Description:
Commonly sea level variations are monitored by tide gages that measure the relative sea
level (RSL) with respect to a local reference on land. RSL measurements are a combination
of the global sea level variation and the local vertical land motion. Larson et al.,2012
developed the interferometric reflectometry technique (GNSS-IR) and demonstrate that sea
surface height can be monitored at the level of a few centimeters using a single GNSS
antenna facing the seashore. In that case, the local reference point matches with the antenna
mount that can be monitored directly in a global reference frame. Thus the GNSS-IR
technique allow to monitor the global Sea-level directly from a single measurement. We
discuss the results obtained for a few Sea-level time series obtained from existing GNSS
permanent stations in the Mediterranean area. We analyse the spectral content of tidal
components and examine the origin of spurious signals observed in the periodograms, due to
satellite-driven aliasing effects.
Description:
Unpublished
Description:
Politecnico di Milano
Description:
7A. Geofisica per il monitoraggio ambientale
Keywords:
GNSS
;
SEA LEVEL
;
GNSS-IR
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
Poster session
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