PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-11:58:10
G05     49.4           15.2                2.9 +/-    1.07       7.3 +/-    1.07  0.090 / 0.290
G10     236.9          12.6                3.1 +/-    1.89       8.1 +/-    1.89  0.090 / 0.210
G13     75.4           36.9                4.0 +/-    0.84       6.1 +/-    0.84  0.040 / 0.040
G15     119.5          53.0                7.0 +/-    0.93       8.6 +/-    0.93  0.040 / 0.050
G18     247.7          45.6                4.9 +/-    1.67       6.5 +/-    1.67  0.050 / 0.060
G20     21.1           69.6                4.7 +/-    0.69       5.0 +/-    0.69  0.030 / 0.060
G21     317.0          50.4                3.9 +/-    1.05       4.8 +/-    1.05  0.120 / 0.220
G25     199.3          10.1                2.6 +/-    5.19       7.2 +/-    5.19  0.110 / 0.250
G26     287.2          20.1                2.6 +/-    1.33       5.6 +/-    1.33  0.040 / 0.100
G29     154.9          68.4                6.5 +/-    0.79       6.9 +/-    0.79  0.040 / 0.090