PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-12:42:40
G10     256.5          30.8                5.5 +/-    1.03       9.5 +/-    1.03  0.510 / 0.340
G13     48.6           26.6                2.9 +/-    2.68       5.5 +/-    2.68  0.480 / 0.400
G15     71.5           53.9                5.1 +/-    0.85       6.2 +/-    0.85  0.090 / 0.340
G16     291.3          14.0                3.7 +/-    1.25       9.4 +/-    1.25  0.090 / 0.280
G20     44.2           47.3                3.5 +/-    1.07       4.6 +/-    1.07  0.050 / 0.040
G21     349.3          67.0                4.5 +/-    0.52       4.8 +/-    0.52  0.050 / 0.040
G26     262.4          12.7                3.8 +/-    2.15      10.0 +/-    2.15  0.070 / 0.070
G27     321.7          11.5               -6.0 +/-   20.94     -16.1 +/-   20.94  0.070 / 0.070
G29     165.3          40.0                4.4 +/-    1.05       6.4 +/-    1.05  0.040 / 0.050