PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-06:12:30
G10     249.7          25.7                7.8 +/-    2.01      15.1 +/-    2.01  0.040 / 0.040
G13     54.8           30.8                5.4 +/-    1.77       9.4 +/-    1.77  0.040 / 0.040
G15     87.6           57.3                7.5 +/-    1.22       8.7 +/-    1.22  0.100 / 0.310
G16     296.3          15.5                3.5 +/-    1.77       8.7 +/-    1.77  0.090 / 0.290
G20     330.2          72.4                6.7 +/-    0.39       7.0 +/-    0.39  0.040 / 0.050
G21     332.4          59.5                5.3 +/-    0.95       6.0 +/-    0.95  0.040 / 0.040
G26     267.6          16.1                5.7 +/-    1.37      13.8 +/-    1.37  0.070 / 0.030
G29     164.7          51.4                7.9 +/-    0.57       9.8 +/-    0.57  0.050 / 0.030