PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-23:58:10
G02     344.0          78.8                7.7 +/-    1.09       7.8 +/-    1.09  0.030 / 0.040
G05     163.4          33.7               14.7 +/-    1.24      23.9 +/-    1.24  0.030 / 0.040
G06     41.6           40.1                7.0 +/-    0.54      10.1 +/-    0.54  0.050 / 0.110
G12     312.1          71.2                7.4 +/-    0.91       7.8 +/-    0.91  0.060 / 0.090
G17     84.5           14.3               10.0 +/-    1.93      25.3 +/-    1.93  0.090 / 0.150
G19     73.7           28.9                9.4 +/-    0.46      16.8 +/-    0.46  0.070 / 0.140
G24     228.6          23.1               15.2 +/-    3.94      31.1 +/-    3.94  0.100 / 0.230
G25     317.4          27.6                5.5 +/-    1.30      10.1 +/-    1.30  0.120 / 0.230