PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-07:27:40
G10     278.3          44.0                5.0 +/-    1.20       6.9 +/-    1.20  0.040 / 0.040
G13     38.5           10.8                2.7 +/-    2.01       7.5 +/-    2.01  0.030 / 0.040
G15     50.8           40.1                3.1 +/-    0.68       4.5 +/-    0.68  0.090 / 0.140
G20     36.0           56.4                4.6 +/-    1.08       5.4 +/-    1.08  0.070 / 0.120
G21     36.0           76.7                5.0 +/-    0.74       5.1 +/-    0.74  0.110 / 0.130
G24     111.8          19.8                5.7 +/-    1.13      12.7 +/-    1.13  0.090 / 0.180
G27     312.6          26.6                4.4 +/-    1.64       8.4 +/-    1.64  0.040 / 0.040
G29     168.7          21.1                4.2 +/-    1.35       9.1 +/-    1.35  0.030 / 0.040
G32     205.8          19.8                5.9 +/-    3.93      13.0 +/-    3.93  0.190 / 0.160