PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-12:58:00
G01     79.6           33.2                4.1 +/-    1.43       6.7 +/-    1.43  0.040 / 0.030
G07     132.7          37.5                6.1 +/-    0.96       9.2 +/-    0.96  0.030 / 0.020
G11     58.6           34.4                5.2 +/-    2.25       8.4 +/-    2.25  0.060 / 0.060
G13     283.5          37.9                6.1 +/-    1.85       9.1 +/-    1.85  0.050 / 0.050
G15     311.7          11.2               -1.5 +/-   15.47      -4.1 +/-   15.47  0.060 / 0.080
G17     222.5          63.9                5.5 +/-    1.07       6.0 +/-    1.07  0.070 / 0.080
G18     54.7           21.0                4.3 +/-    4.31       9.2 +/-    4.31  0.060 / 0.100
G19     219.2          31.7                2.9 +/-    1.67       4.9 +/-    1.67  0.050 / 0.080
G28     5.6            60.8                3.8 +/-    1.21       4.3 +/-    1.21  0.240 / 0.240
G30     124.9          70.6                5.4 +/-    0.80       5.7 +/-    0.80  0.250 / 0.210