PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-20:42:50
G02     14.0           68.6                9.9 +/-    0.36      10.5 +/-    0.36  0.030 / 0.040
G05     156.1          48.0               13.7 +/-    1.32      17.7 +/-    1.32  0.040 / 0.050
G06     47.0           26.2                7.6 +/-    1.58      14.5 +/-    1.58  0.140 / 0.410
G12     232.3          80.2               10.1 +/-    0.72      10.2 +/-    0.72  0.110 / 0.430
G19     86.5           21.1               10.2 +/-    1.84      21.9 +/-    1.84  0.120 / 0.090
G24     217.2          12.5               14.9 +/-    2.28      39.3 +/-    2.28  0.100 / 0.090
G25     312.0          42.0               10.3 +/-    0.95      14.5 +/-    0.95  0.050 / 0.100
G29     296.0          16.5               11.1 +/-    1.23      26.6 +/-    1.23  0.050 / 0.080