PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-03:27:50
G01     64.6           31.9                3.0 +/-    1.45       5.0 +/-    1.45  0.040 / 0.030
G07     140.3          26.1                6.2 +/-    1.10      11.9 +/-    1.10  0.050 / 0.040
G11     51.4           28.3                3.2 +/-    1.92       5.7 +/-    1.92  0.100 / 0.180
G13     268.8          36.2                6.1 +/-    1.51       9.4 +/-    1.51  0.100 / 0.230
G15     297.0          16.6                5.0 +/-    1.61      11.9 +/-    1.61  0.030 / 0.020
G17     245.4          73.0                5.6 +/-    0.48       5.9 +/-    0.48  0.030 / 0.030
G19     228.9          47.8                6.0 +/-    1.90       7.8 +/-    1.90  0.050 / 0.080
G28     30.1           57.6                2.2 +/-    0.96       2.5 +/-    0.96  0.050 / 0.070
G30     139.9          52.8                5.7 +/-    0.94       7.0 +/-    0.94  0.060 / 0.110