PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-08:57:20
G02     209.1          52.8                6.2 +/-    0.48       7.5 +/-    0.48  0.080 / 0.240
G06     132.6          80.9                4.6 +/-    0.46       4.7 +/-    0.46  0.090 / 0.210
G12     315.0          26.8                3.0 +/-    1.49       5.7 +/-    1.49  0.040 / 0.040
G17     50.9           37.2                2.5 +/-    1.60       3.8 +/-    1.60  0.030 / 0.040
G19     30.4           54.0                2.5 +/-    1.13       3.0 +/-    1.13  0.170 / 0.140
G24     279.4          41.9                4.6 +/-    1.55       6.4 +/-    1.55  0.070 / 0.100
G28     116.8          19.4                5.0 +/-    1.72      11.3 +/-    1.72  0.020 / 0.020