PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-05:12:40
G02     227.5          72.2                5.4 +/-    0.83       5.7 +/-    0.83  0.070 / 0.110
G05     173.5          11.3                1.9 +/-   17.71       5.1 +/-   17.71  0.040 / 0.120
G06     43.9           67.7                4.0 +/-    1.23       4.3 +/-    1.23  0.030 / 0.040
G12     320.7          43.9                4.1 +/-    1.23       5.6 +/-    1.23  0.030 / 0.040
G17     65.0           27.5                2.2 +/-    0.90       4.0 +/-    0.90  0.110 / 0.270
G19     50.8           42.5                3.2 +/-    0.92       4.5 +/-    0.92  0.140 / 0.200
G24     253.8          38.2                4.9 +/-    2.15       7.4 +/-    2.15  0.030 / 0.060