PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-09:27:50
G02     68.5           24.3                4.5 +/-    1.20       8.9 +/-    1.20  0.040 / 0.040
G05     48.6           51.2                3.9 +/-    0.57       4.9 +/-    0.57  0.040 / 0.070
G12     184.2          23.9                5.0 +/-    1.28      10.0 +/-    1.28  0.040 / 0.040
G13     121.2          21.6                5.1 +/-    0.82      10.7 +/-    0.82  0.030 / 0.040
G15     157.1          20.6                5.7 +/-    2.67      12.3 +/-    2.67  0.100 / 0.200
G20     217.6          65.2                6.5 +/-    0.79       7.1 +/-    0.79  0.170 / 0.180
G21     280.2          25.4                4.2 +/-    2.08       8.1 +/-    2.08  0.090 / 0.130
G25     225.8          44.5                5.6 +/-    2.64       7.6 +/-    2.64  0.110 / 0.140
G29     337.0          65.8                5.2 +/-    0.80       5.6 +/-    0.80  0.060 / 0.110