PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-06:57:50
G10     249.7          25.6                7.2 +/-    2.23      13.8 +/-    2.23  0.110 / 0.400
G13     54.9           30.9                5.0 +/-    2.08       8.5 +/-    2.08  0.100 / 0.340
G15     87.2           57.2                5.6 +/-    1.18       6.5 +/-    1.18  0.030 / 0.030
G16     296.6          15.4                2.3 +/-    1.32       5.6 +/-    1.32  0.030 / 0.040
G20     352.6          71.6                4.6 +/-    0.56       4.8 +/-    0.56  0.040 / 0.040
G21     332.7          59.6                4.3 +/-    0.73       4.8 +/-    0.73  0.040 / 0.040
G26     267.8          16.1                5.4 +/-    1.79      13.0 +/-    1.79  0.050 / 0.020
G29     164.6          51.1                6.2 +/-    0.62       7.7 +/-    0.62  0.040 / 0.020