PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-18:58:10
G01     112.5          22.5               14.7 +/-    1.75      30.4 +/-    1.75  0.060 / 0.120
G07     96.6           62.7               11.7 +/-    0.60      13.0 +/-    0.60  0.070 / 0.170
G08     43.3           27.8                9.4 +/-    2.16      17.2 +/-    2.16  0.030 / 0.040
G09     176.1          19.1               15.9 +/-    2.13      35.7 +/-    2.13  0.030 / 0.030
G11     98.4           42.3               13.8 +/-    1.14      19.4 +/-    1.14  0.030 / 0.040
G13     313.7          24.7                8.6 +/-    1.22      16.9 +/-    1.22  0.020 / 0.030
G17     204.9          28.6               13.0 +/-    1.32      23.5 +/-    1.32  0.100 / 0.130
G18     86.9           23.2               12.5 +/-    1.40      25.3 +/-    1.40  0.100 / 0.150
G28     307.4          59.9               10.8 +/-    0.82      12.3 +/-    0.82  0.050 / 0.050
G30     7.8            75.1               11.2 +/-    0.41      11.6 +/-    0.41  0.040 / 0.060