PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-12:42:40
G01     47.2           23.0                3.9 +/-    1.65       8.0 +/-    1.65  0.030 / 0.030
G06     176.1          27.7                6.0 +/-    2.42      11.1 +/-    2.42  0.030 / 0.030
G11     44.2           14.2                2.7 +/-    2.05       6.9 +/-    2.05  0.040 / 0.040
G13     246.6          29.8                8.7 +/-    1.09      15.4 +/-    1.09  0.040 / 0.040
G15     282.0          15.0                5.3 +/-    2.16      13.2 +/-    2.16  0.090 / 0.170
G17     308.3          77.9                5.4 +/-    0.49       5.5 +/-    0.49  0.100 / 0.150
G19     251.1          63.7                6.5 +/-    0.64       7.2 +/-    0.64  0.120 / 0.280
G28     46.6           56.1                4.4 +/-    0.40       5.2 +/-    0.40  0.100 / 0.250
G30     151.0          39.5                6.1 +/-    0.56       9.0 +/-    0.56  0.050 / 0.080