PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-10:13:10
G01     105.7          26.2                4.1 +/-    2.01       7.8 +/-    2.01  0.030 / 0.030
G07     109.5          56.5                5.6 +/-    0.30       6.6 +/-    0.30  0.030 / 0.040
G08     41.5           17.4                3.0 +/-    2.72       7.1 +/-    2.72  0.080 / 0.150
G11     85.3           42.5                6.6 +/-    1.46       9.2 +/-    1.46  0.080 / 0.130
G13     308.3          29.8                3.1 +/-    1.78       5.5 +/-    1.78  0.020 / 0.020
G17     205.8          40.9                4.1 +/-    1.07       5.9 +/-    1.07  0.020 / 0.020
G18     77.4           24.1                3.8 +/-    1.27       7.7 +/-    1.27  0.030 / 0.050
G28     318.9          60.9                2.5 +/-    0.74       2.8 +/-    0.74  0.030 / 0.050
G30     21.6           78.6                4.5 +/-    0.65       4.6 +/-    0.65  0.070 / 0.120