PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-12:42:40
G10     294.9          50.7                2.7 +/-    0.52       3.4 +/-    0.52  0.040 / 0.040
G15     46.1           27.9                1.9 +/-    1.30       3.6 +/-    1.30  0.040 / 0.040
G20     68.4           23.7                2.4 +/-    0.80       4.9 +/-    0.80  0.060 / 0.100
G21     96.9           72.7                3.8 +/-    1.37       4.0 +/-    1.37  0.060 / 0.090
G24     99.8           26.0                3.5 +/-    0.83       6.6 +/-    0.83  0.060 / 0.180
G27     300.8          34.3                4.3 +/-    0.95       6.9 +/-    0.95  0.070 / 0.170
G32     210.1          31.3                2.5 +/-    1.08       4.2 +/-    1.08  0.040 / 0.040