PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-03:57:30
G02     204.5          43.0                7.5 +/-    1.24      10.4 +/-    1.24  0.090 / 0.150
G06     154.8          74.1                5.9 +/-    0.60       6.1 +/-    0.60  0.080 / 0.140
G12     310.5          18.8                2.5 +/-    1.87       5.8 +/-    1.87  0.040 / 0.020
G17     40.3           46.2                2.1 +/-    1.78       2.8 +/-    1.78  0.040 / 0.020
G19     14.0           61.2                3.2 +/-    0.70       3.6 +/-    0.70  0.040 / 0.060
G24     291.7          40.1                0.6 +/-    7.66       0.8 +/-    7.66  0.040 / 0.040
G28     108.6          26.5                4.3 +/-    0.80       8.2 +/-    0.80  0.120 / 0.150