PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-16:28:10
G02     219.2          60.2                9.9 +/-    1.91      11.3 +/-    1.91  0.070 / 0.090
G06     50.4           69.4                9.2 +/-    0.38       9.7 +/-    0.38  0.060 / 0.090
G12     320.9          43.5                8.3 +/-    0.43      11.4 +/-    0.43  0.050 / 0.050
G17     60.6           29.2               10.7 +/-    2.49      19.1 +/-    2.49  0.050 / 0.050
G19     38.7           50.1                9.6 +/-    1.69      12.1 +/-    1.69  0.030 / 0.030
G24     259.1          41.1               10.1 +/-    4.76      14.5 +/-    4.76  0.030 / 0.020
G28     124.4          11.7                8.9 +/-    3.07      24.0 +/-    3.07  0.050 / 0.040