PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/05-04:13:00
G02     39.3           50.0                2.6 +/-    1.16       3.3 +/-    1.16  0.030 / 0.040
G05     124.3          66.1                4.6 +/-    0.30       4.9 +/-    0.30  0.030 / 0.040
G06     56.6           12.6                1.8 +/-    1.29       4.7 +/-    1.29  0.030 / 0.030
G12     195.5          62.8                5.5 +/-    0.47       6.1 +/-    0.47  0.030 / 0.040
G20     206.7          12.3                4.5 +/-    8.55      11.9 +/-    8.55  0.040 / 0.040
G25     289.9          55.5                3.7 +/-    0.97       4.4 +/-    0.97  0.060 / 0.040
G29     310.9          31.7                4.3 +/-    1.81       7.3 +/-    1.81  0.110 / 0.140