PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-11:27:50
G10     256.0          30.5                4.4 +/-    1.24       7.6 +/-    1.24  0.300 / 0.180
G13     48.9           26.9                1.7 +/-    2.22       3.1 +/-    2.22  0.220 / 0.240
G15     72.5           54.2                5.2 +/-    0.82       6.2 +/-    0.82  0.050 / 0.050
G16     291.2          14.2                2.1 +/-    1.23       5.3 +/-    1.23  0.060 / 0.060
G20     43.1           48.6                3.0 +/-    0.96       3.8 +/-    0.96  0.050 / 0.040
G21     346.5          66.1                3.9 +/-    0.75       4.2 +/-    0.75  0.060 / 0.040
G26     262.4          13.0                3.1 +/-    2.33       8.0 +/-    2.33  0.070 / 0.220
G27     321.9          10.9              -11.0 +/-   17.84     -30.1 +/-   17.84  0.070 / 0.210
G29     165.5          41.3                4.9 +/-    0.82       7.0 +/-    0.82  0.120 / 0.110