PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-04:27:50
G01     37.9           10.2                2.4 +/-    2.85       6.7 +/-    2.85  0.210 / 0.310
G02     199.0          17.5                5.1 +/-    0.94      12.0 +/-    0.94  0.140 / 0.360
G06     175.9          45.6                5.9 +/-    1.90       8.0 +/-    1.90  0.040 / 0.080
G13     232.0          16.6                5.5 +/-    2.07      13.3 +/-    2.07  0.040 / 0.090
G17     13.9           64.5                1.9 +/-    0.55       2.0 +/-    0.55  0.090 / 0.370
G19     306.9          71.6                2.4 +/-    0.61       2.5 +/-    0.61  0.100 / 0.340
G24     313.7          24.9                4.6 +/-    3.04       9.1 +/-    3.04  0.090 / 0.160
G28     82.5           42.1                3.6 +/-    0.58       5.1 +/-    0.58  0.110 / 0.180
G30     155.2          16.3                5.4 +/-    1.16      13.0 +/-    1.16  0.040 / 0.030