Figure 5
From: Sea level measurements using multi-frequency GPS and GLONASS observations
Sea level derived from SNR analysis. The time series consist, from top to bottom, of data from GPS L1 (blue squares), GLONASS L1 (green circles), GPS L2 (cyan triangles), and GLONASS L2 (red diamonds). The time series are displayed together with the sea level time series from the co-located tide gauge (black line) and offset by 40 cm from each other in order to increase visibility. Error bars (grey) represent the scaled fraction between the mean spectral power (noise power) of the LSP and the peak spectral power (corresponding to the reflector height measurement) of the LSP.