PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/16-13:13:00
G01     75.7           33.2                2.8 +/-    1.80       4.6 +/-    1.80  0.030 / 0.030
G07     134.8          34.7                5.8 +/-    0.66       9.3 +/-    0.66  0.040 / 0.030
G11     55.9           32.5                2.7 +/-    1.38       4.6 +/-    1.38  0.070 / 0.070
G13     279.4          38.0                3.5 +/-    2.15       5.3 +/-    2.15  0.040 / 0.070
G15     309.1          12.3                3.5 +/-    2.16       9.3 +/-    2.16  0.090 / 0.090
G17     226.8          66.8                5.6 +/-    1.09       6.1 +/-    1.09  0.060 / 0.100
G18     51.9           19.7                3.4 +/-    3.90       7.5 +/-    3.90  0.050 / 0.090
G19     221.1          34.6                4.8 +/-    2.28       7.6 +/-    2.28  0.050 / 0.090
G28     11.6           60.2                5.4 +/-    1.72       6.1 +/-    1.72  0.150 / 0.340
G30     130.2          67.6                4.9 +/-    0.56       5.3 +/-    0.56  0.160 / 0.230