PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-16:12:40
G07     313.0          49.3               11.4 +/-    0.93      14.5 +/-    0.93  0.040 / 0.060
G08     125.0          44.4               14.1 +/-    0.73      19.2 +/-    0.73  0.040 / 0.060
G09     272.3          82.6               11.7 +/-    0.77      11.7 +/-    0.77  0.130 / 0.170
G16     43.0           17.7                7.9 +/-    3.82      18.3 +/-    3.82  0.120 / 0.210
G23     147.1          52.4               14.3 +/-    0.65      17.5 +/-    0.65  0.070 / 0.050
G27     71.3           36.7               12.1 +/-    0.69      18.6 +/-    0.69  0.060 / 0.050
G28     227.3          17.7               16.4 +/-    2.99      38.2 +/-    2.99  0.140 / 0.200
G30     290.8          26.4               11.0 +/-    0.91      20.9 +/-    0.91  0.490 / 0.670