PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-13:12:50
G02     203.7          27.1                6.1 +/-    2.51      11.3 +/-    2.51  0.140 / 0.080
G06     161.5          66.2                6.7 +/-    0.31       7.3 +/-    0.31  0.130 / 0.110
G12     306.5          15.5                2.6 +/-    1.78       6.5 +/-    1.78  0.190 / 0.250
G17     34.2           50.5                5.3 +/-    1.02       6.7 +/-    1.02  0.120 / 0.310
G19     339.5          68.2                5.1 +/-    0.42       5.5 +/-    0.42  0.030 / 0.030
G24     299.4          38.2                5.7 +/-    2.30       8.5 +/-    2.30  0.030 / 0.030
G28     98.5           34.2                6.7 +/-    0.69      10.8 +/-    0.69  0.030 / 0.020