PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-10:42:50
G05     50.4           12.8                1.0 +/-    1.71       2.7 +/-    1.71  0.040 / 0.050
G10     238.6          14.7                5.6 +/-    4.14      14.1 +/-    4.14  0.040 / 0.040
G13     71.9           36.5                2.7 +/-    0.60       4.2 +/-    0.60  0.090 / 0.120
G15     115.1          54.4                5.8 +/-    0.73       7.0 +/-    0.73  0.090 / 0.150
G16     312.3          12.7                2.6 +/-    2.35       6.8 +/-    2.35  0.040 / 0.060
G20     22.6           68.0                3.1 +/-    0.57       3.3 +/-    0.57  0.050 / 0.070
G21     318.8          51.4                4.6 +/-    1.33       5.7 +/-    1.33  0.040 / 0.130
G26     283.9          19.9                4.1 +/-    1.69       9.0 +/-    1.69  0.040 / 0.100
G29     157.2          66.2                4.3 +/-    1.01       4.7 +/-    1.01  0.130 / 0.260