PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-04:27:20
G02     224.5          70.4                4.5 +/-    0.92       4.7 +/-    0.92  0.040 / 0.050
G06     45.5           69.1                4.0 +/-    0.49       4.3 +/-    0.49  0.050 / 0.050
G12     320.3          42.3                3.5 +/-    0.51       4.9 +/-    0.51  0.030 / 0.030
G17     63.1           29.1                3.4 +/-    1.08       6.0 +/-    1.08  0.030 / 0.030
G19     48.7           43.8                3.6 +/-    0.88       4.9 +/-    0.88  0.050 / 0.090
G24     255.9          39.0                4.4 +/-    2.26       6.5 +/-    2.26  0.050 / 0.080