PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-10:57:50
G10     253.8          28.8                4.6 +/-    2.72       8.3 +/-    2.72  0.050 / 0.040
G13     50.8           28.4                2.0 +/-    2.62       3.7 +/-    2.62  0.050 / 0.050
G15     76.8           55.3                5.2 +/-    0.78       6.2 +/-    0.78  0.040 / 0.050
G16     293.4          14.6                2.2 +/-    1.50       5.6 +/-    1.50  0.040 / 0.040
G20     40.9           51.0                3.5 +/-    0.60       4.3 +/-    0.60  0.080 / 0.310
G21     342.2          64.3                3.6 +/-    0.80       4.0 +/-    0.80  0.080 / 0.260
G26     264.4          14.0                3.2 +/-    3.61       8.1 +/-    3.61  0.070 / 0.120
G29     165.0          44.2                7.1 +/-    0.92       9.7 +/-    0.92  0.090 / 0.110