PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-13:27:50
G10     253.2          28.2                2.5 +/-    1.75       4.5 +/-    1.75  0.110 / 0.290
G13     51.5           29.0                5.4 +/-    1.96       9.7 +/-    1.96  0.130 / 0.480
G15     77.9           55.5                6.7 +/-    0.92       7.9 +/-    0.92  0.070 / 0.050
G16     295.5          14.2                2.2 +/-    1.61       5.5 +/-    1.61  0.050 / 0.050
G18     277.0          59.9                5.4 +/-    1.15       6.1 +/-    1.15  0.060 / 0.040
G20     41.8           49.8                3.7 +/-    0.97       4.7 +/-    0.97  0.050 / 0.040
G21     344.4          65.0                3.4 +/-    0.50       3.7 +/-    0.50  0.080 / 0.300
G26     266.2          14.3                1.4 +/-    2.67       3.4 +/-    2.67  0.080 / 0.330
G29     164.2          43.5                8.3 +/-    0.68      11.4 +/-    0.68  0.080 / 0.120