PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-05:27:30
G02     233.9          75.1                4.4 +/-    0.38       4.5 +/-    0.38  0.190 / 0.200
G05     172.3          13.8                4.9 +/-    2.13      12.5 +/-    2.13  0.150 / 0.180
G06     41.7           64.7                3.5 +/-    0.56       3.9 +/-    0.56  0.070 / 0.110
G12     321.1          46.9                3.5 +/-    0.75       4.6 +/-    0.75  0.060 / 0.140
G17     67.6           25.6                3.4 +/-    2.69       6.5 +/-    2.69  0.040 / 0.040
G19     54.1           40.5                2.8 +/-    1.45       4.0 +/-    1.45  0.040 / 0.050
G24     250.1          36.8                4.7 +/-    1.58       7.2 +/-    1.58  0.090 / 0.080