PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/29-06:12:30
G02     202.0          29.9                7.0 +/-    2.06      12.3 +/-    2.06  0.060 / 0.080
G06     168.6          62.5                7.5 +/-    0.70       8.3 +/-    0.70  0.050 / 0.070
G12     304.4          11.0               -4.3 +/-   12.06     -11.7 +/-   12.06  0.040 / 0.040
G17     34.3           50.3                4.9 +/-    0.55       6.2 +/-    0.55  0.040 / 0.040
G19     344.9          68.2                6.5 +/-    0.40       6.9 +/-    0.40  0.150 / 0.290
G24     299.1          38.8                6.1 +/-    0.72       9.1 +/-    0.72  0.120 / 0.320
G28     96.5           36.1                7.6 +/-    0.30      11.8 +/-    0.30  0.050 / 0.130