PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-17:58:10
G03     189.5          21.5               12.5 +/-    1.21      26.5 +/-    1.21  0.050 / 0.090
G07     287.2          35.3               12.5 +/-    1.41      19.7 +/-    1.41  0.050 / 0.090
G08     147.9          23.9               12.7 +/-    2.28      25.5 +/-    2.28  0.040 / 0.090
G09     320.4          59.0               11.6 +/-    0.94      13.3 +/-    0.94  0.040 / 0.070
G16     43.5           40.8               11.7 +/-    0.85      16.8 +/-    0.85  0.030 / 0.050
G23     109.7          78.1               10.8 +/-    0.38      11.0 +/-    0.38  0.030 / 0.030
G26     43.2           12.5                8.9 +/-    1.10      23.5 +/-    1.10  0.080 / 0.190
G27     102.1          32.6               12.8 +/-    0.79      21.4 +/-    0.79  0.120 / 0.180
G30     272.4          12.8               13.7 +/-    1.80      36.0 +/-    1.80  0.100 / 0.150