PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/13-13:42:40
G01     41.6           17.3                5.8 +/-    1.12      13.6 +/-    1.12  0.080 / 0.230
G06     174.3          36.6                8.9 +/-    1.78      13.8 +/-    1.78  0.080 / 0.260
G13     238.6          24.3                5.7 +/-    1.98      11.4 +/-    1.98  0.040 / 0.070
G15     273.7          12.9                5.3 +/-    1.42      13.9 +/-    1.42  0.040 / 0.060
G17     342.3          74.4                7.3 +/-    0.86       7.5 +/-    0.86  0.160 / 0.410
G19     271.7          69.3                6.8 +/-    0.60       7.2 +/-    0.60  0.160 / 0.270
G24     317.4          16.2                3.3 +/-    4.01       7.9 +/-    4.01  0.060 / 0.080
G28     60.6           52.8                6.7 +/-    0.79       8.2 +/-    0.79  0.050 / 0.090
G30     153.9          30.3                8.2 +/-    1.20      14.3 +/-    1.20  0.090 / 0.160