PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-14:12:30
G02     216.2          54.8                8.9 +/-    1.22      10.7 +/-    1.22  0.060 / 0.090
G06     59.2           74.3                8.1 +/-    0.63       8.4 +/-    0.63  0.090 / 0.090
G12     319.1          38.1                5.3 +/-    0.97       8.0 +/-    0.97  0.030 / 0.080
G17     57.4           31.7                5.6 +/-    1.20       9.4 +/-    1.20  0.040 / 0.070
G19     32.1           53.3                6.4 +/-    0.58       7.8 +/-    0.58  0.030 / 0.030
G24     263.4          42.3                7.0 +/-    0.74       9.8 +/-    0.74  0.040 / 0.030
G28     121.6          15.3                7.4 +/-    0.96      18.2 +/-    0.96  0.040 / 0.040