PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-12:28:10
G10     286.3          47.4                3.1 +/-    0.99       4.0 +/-    0.99  0.040 / 0.040
G15     47.6           33.5                1.8 +/-    0.76       3.0 +/-    0.76  0.040 / 0.050
G20     63.7           28.0                1.2 +/-    1.15       2.1 +/-    1.15  0.050 / 0.090
G21     74.5           75.7                4.3 +/-    0.77       4.4 +/-    0.77  0.060 / 0.090
G24     106.3          23.1                4.2 +/-    1.36       8.5 +/-    1.36  0.060 / 0.170
G27     307.0          31.1                3.5 +/-    1.85       6.1 +/-    1.85  0.050 / 0.150
G29     167.8          13.1                3.5 +/-    2.14       9.2 +/-    2.14  0.050 / 0.050
G32     207.9          25.1                2.5 +/-    1.39       4.8 +/-    1.39  0.050 / 0.050