PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-01:57:50
G02     307.2          82.0                8.5 +/-    0.69       8.6 +/-    0.69  0.040 / 0.020
G05     166.4          26.9               12.7 +/-    2.28      23.7 +/-    2.28  0.030 / 0.020
G06     40.1           47.9                8.7 +/-    0.77      11.3 +/-    0.77  0.070 / 0.070
G12     319.1          62.7                9.5 +/-    1.17      10.5 +/-    1.17  0.070 / 0.050
G17     77.9           19.8                8.5 +/-    1.25      18.8 +/-    1.25  0.260 / 0.100
G19     67.3           32.7                9.4 +/-    1.71      15.6 +/-    1.71  0.210 / 0.110
G24     235.0          28.1               11.3 +/-    1.13      20.5 +/-    1.13  0.070 / 0.080
G25     317.8          20.9                8.1 +/-    2.04      17.4 +/-    2.04  0.120 / 0.080