PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-05:12:30
G10     250.2          26.2                8.6 +/-    1.41      16.4 +/-    1.41  0.080 / 0.270
G13     54.2           30.4                6.2 +/-    1.96      10.8 +/-    1.96  0.080 / 0.300
G15     86.9           57.4                7.5 +/-    0.95       8.7 +/-    0.95  0.040 / 0.040
G16     295.5          15.6                3.4 +/-    1.26       8.5 +/-    1.26  0.040 / 0.040
G20     304.2          69.5                6.4 +/-    0.48       6.8 +/-    0.48  0.080 / 0.180
G21     332.7          59.7                5.7 +/-    0.66       6.5 +/-    0.66  0.060 / 0.120
G26     266.9          15.8                6.5 +/-    2.27      15.8 +/-    2.27  0.040 / 0.050
G29     165.0          50.9                8.2 +/-    0.55      10.2 +/-    0.55  0.040 / 0.050