PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-09:12:40
G02     69.0           24.0                4.6 +/-    0.88       9.3 +/-    0.88  0.080 / 0.190
G05     48.3           50.6                2.5 +/-    0.40       3.2 +/-    0.40  0.080 / 0.150
G12     184.0          23.3                4.9 +/-    1.20      10.0 +/-    1.20  0.030 / 0.040
G13     120.6          22.0                7.9 +/-    1.09      16.6 +/-    1.09  0.030 / 0.040
G15     156.8          21.1                5.8 +/-    1.56      12.5 +/-    1.56  0.040 / 0.050
G20     218.3          65.6                6.6 +/-    0.55       7.2 +/-    0.55  0.030 / 0.040
G21     280.6          25.6                5.1 +/-    1.47       9.8 +/-    1.47  0.060 / 0.090
G25     225.2          44.0                6.2 +/-    1.24       8.5 +/-    1.24  0.050 / 0.090
G29     337.3          66.3                3.3 +/-    0.79       3.6 +/-    0.79  0.030 / 0.040