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                5.1 +/-    1.14      10.3 +/-    1.14  0.030 / 0.040
G05     48.3           50.6                3.4 +/-    0.60       4.3 +/-    0.60  0.040 / 0.030
G12     184.0          23.3                5.0 +/-    1.08      10.2 +/-    1.08  0.040 / 0.040
G13     120.6          22.0                6.4 +/-    1.27      13.3 +/-    1.27  0.040 / 0.040
G15     156.8          21.1                6.1 +/-    2.80      13.1 +/-    2.80  0.150 / 0.180
G20     218.3          65.6                5.4 +/-    0.69       5.9 +/-    0.69  0.140 / 0.250
G21     280.6          25.6                3.1 +/-    1.16       6.0 +/-    1.16  0.110 / 0.150
G25     225.2          44.0                4.7 +/-    2.47       6.5 +/-    2.47  0.120 / 0.190
G29     337.3          66.3                5.2 +/-    0.69       5.6 +/-    0.69  0.120 / 0.070