PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-13:28:00
G01     315.5          24.6                5.2 +/-    1.69      10.2 +/-    1.69  0.080 / 0.040
G10     91.7           48.5                5.3 +/-    1.19       6.9 +/-    1.19  0.060 / 0.040
G11     297.5          24.7                4.1 +/-    1.28       8.1 +/-    1.28  0.090 / 0.150
G14     316.2          70.2                4.7 +/-    0.49       4.9 +/-    0.49  0.100 / 0.170
G22     305.5          19.3                3.3 +/-    1.39       7.5 +/-    1.39  0.120 / 0.180
G25     94.6           12.2                7.9 +/-    1.87      21.0 +/-    1.87  0.150 / 0.250
G31     172.0          52.7                7.9 +/-    0.44       9.7 +/-    0.44  0.040 / 0.040
G32     23.4           60.4                5.2 +/-    0.63       5.9 +/-    0.63  0.050 / 0.040