PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-11:58:10
G02     200.4          12.9                2.0 +/-    1.82       5.1 +/-    1.82  0.040 / 0.090
G06     171.1          48.1                4.8 +/-    0.40       6.2 +/-    0.40  0.050 / 0.090
G13     230.1          17.4                4.4 +/-    2.05      10.4 +/-    2.05  0.130 / 0.170
G17     10.2           66.2                3.8 +/-    0.79       4.1 +/-    0.79  0.160 / 0.220
G19     307.8          72.3                3.8 +/-    0.33       4.0 +/-    0.33  0.030 / 0.040
G24     313.7          24.1                4.0 +/-    2.80       8.0 +/-    2.80  0.030 / 0.040
G28     74.8           48.5                3.5 +/-    0.79       4.4 +/-    0.79  0.130 / 0.530
G30     156.7          21.3                5.3 +/-    1.91      11.2 +/-    1.91  0.210 / 0.590