PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-13:27:50
G01     38.6           12.6                3.9 +/-    4.20      10.4 +/-    4.20  0.370 / 0.310
G06     172.6          43.3                6.9 +/-    0.92       9.5 +/-    0.92  0.120 / 0.220
G13     233.4          20.2                6.0 +/-    2.65      13.2 +/-    2.65  0.020 / 0.030
G15     268.3          10.8                5.2 +/-    1.45      14.2 +/-    1.45  0.030 / 0.030
G17     359.7          70.1                4.7 +/-    0.90       5.0 +/-    0.90  0.030 / 0.030
G19     291.9          71.7                4.5 +/-    0.67       4.7 +/-    0.67  0.030 / 0.030
G24     315.4          21.1                4.0 +/-    3.32       8.5 +/-    3.32  0.090 / 0.350
G28     69.5           50.2                5.1 +/-    1.44       6.5 +/-    1.44  0.140 / 0.270
G30     155.6          24.5                6.2 +/-    1.20      12.2 +/-    1.20  0.050 / 0.050