PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-08:58:10
G10     252.1          27.5                5.9 +/-    1.23      10.8 +/-    1.23  0.090 / 0.390
G13     52.4           29.4                6.2 +/-    1.79      10.9 +/-    1.79  0.120 / 0.420
G15     80.8           56.2                8.1 +/-    0.94       9.5 +/-    0.94  0.030 / 0.040
G16     294.4          15.1                2.6 +/-    2.56       6.4 +/-    2.56  0.030 / 0.040
G20     32.1           58.8                5.6 +/-    0.95       6.4 +/-    0.95  0.040 / 0.040
G21     337.6          62.2                5.3 +/-    0.68       5.9 +/-    0.68  0.040 / 0.040
G26     265.6          14.9                7.0 +/-    2.24      17.5 +/-    2.24  0.060 / 0.130
G29     165.0          47.2                7.6 +/-    0.66      10.0 +/-    0.66  0.080 / 0.120