PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/14-10:28:00
G10     285.0          46.9                3.8 +/-    3.70       5.0 +/-    3.70  0.070 / 0.090
G15     48.0           34.6                4.7 +/-    1.10       7.5 +/-    1.10  0.070 / 0.100
G20     60.8           32.5                4.0 +/-    2.22       6.7 +/-    2.22  0.040 / 0.040
G21     65.9           76.6                4.4 +/-    0.43       4.5 +/-    0.43  0.040 / 0.040
G24     107.0          22.7                6.5 +/-    1.17      13.3 +/-    1.17  0.050 / 0.080
G27     308.1          30.3                5.5 +/-    1.36       9.6 +/-    1.36  0.050 / 0.110
G29     168.3          14.9                4.3 +/-    1.16      10.8 +/-    1.16  0.080 / 0.180
G32     207.4          24.6                4.9 +/-    1.27       9.7 +/-    1.27  0.080 / 0.150