PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-07:42:50
G02     211.0          52.6                6.1 +/-    1.56       7.5 +/-    1.56  0.050 / 0.070
G06     96.1           80.2                5.7 +/-    0.45       5.8 +/-    0.45  0.050 / 0.070
G12     315.5          29.0                4.0 +/-    2.42       7.2 +/-    2.42  0.100 / 0.190
G17     53.0           34.6                3.1 +/-    0.94       5.0 +/-    0.94  0.090 / 0.230
G19     27.3           55.4                3.5 +/-    0.73       4.2 +/-    0.73  0.040 / 0.020
G24     269.4          43.9                4.9 +/-    1.43       6.7 +/-    1.43  0.040 / 0.030
G28     116.8          20.9                7.1 +/-    2.08      15.4 +/-    2.08  0.090 / 0.130