PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-14:42:50
G03     191.1          22.8               10.0 +/-    4.09      20.5 +/-    4.09  0.070 / 0.120
G07     287.4          35.5               11.2 +/-    1.08      17.7 +/-    1.08  0.080 / 0.090
G08     145.6          25.0               12.1 +/-    2.66      23.7 +/-    2.66  0.120 / 0.190
G09     320.8          60.2               10.0 +/-    0.59      11.3 +/-    0.59  0.080 / 0.210
G16     43.3           39.5                7.8 +/-    0.33      11.4 +/-    0.33  0.150 / 0.410
G23     111.9          77.2               10.1 +/-    0.85      10.3 +/-    0.85  0.140 / 0.450
G26     43.2           11.9                7.2 +/-    3.29      19.2 +/-    3.29  0.150 / 0.230
G27     102.3          32.6               10.3 +/-    0.64      17.1 +/-    0.64  0.150 / 0.280
G30     272.0          11.6                7.8 +/-    6.28      21.1 +/-    6.28  0.040 / 0.090