PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-17:28:10
G07     20.0           68.7               11.1 +/-    1.02      11.9 +/-    1.02  0.040 / 0.050
G08     62.9           49.0               11.3 +/-    0.41      14.5 +/-    0.41  0.050 / 0.070
G09     179.7          47.5               15.0 +/-    2.31      19.6 +/-    2.31  0.040 / 0.060
G11     129.5          28.6               15.0 +/-    1.01      27.1 +/-    1.01  0.040 / 0.050
G18     113.3          11.2               14.3 +/-   13.86      39.0 +/-   13.86  0.050 / 0.090
G23     158.7          13.4               16.1 +/-    2.40      41.7 +/-    2.40  0.040 / 0.090
G27     39.6           15.2                9.1 +/-    1.73      22.6 +/-    1.73  0.090 / 0.190
G28     261.8          47.0               14.7 +/-    1.28      19.2 +/-    1.28  0.110 / 0.210
G30     323.2          53.0               14.2 +/-    0.79      17.2 +/-    0.79  0.030 / 0.040