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                9.3 +/-    1.17      11.1 +/-    1.17  0.050 / 0.080
G06     59.2           74.3                8.6 +/-    0.52       8.8 +/-    0.52  0.080 / 0.070
G12     319.1          38.1                6.6 +/-    0.79       9.9 +/-    0.79  0.050 / 0.070
G17     57.4           31.7                6.3 +/-    2.74      10.7 +/-    2.74  0.040 / 0.070
G19     32.1           53.3                8.3 +/-    0.52      10.1 +/-    0.52  0.030 / 0.020
G24     263.4          42.3                8.8 +/-    3.32      12.3 +/-    3.32  0.030 / 0.020
G28     121.6          15.3                8.5 +/-    1.82      21.0 +/-    1.82  0.050 / 0.040