PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-07:27:50
G10     278.3          44.0                4.3 +/-    0.64       5.8 +/-    0.64  0.080 / 0.130
G13     38.5           10.8                3.2 +/-    2.50       8.7 +/-    2.50  0.080 / 0.140
G15     50.8           40.1                3.8 +/-    0.71       5.5 +/-    0.71  0.040 / 0.050
G20     36.0           56.4                4.4 +/-    0.56       5.2 +/-    0.56  0.030 / 0.050
G21     36.0           76.7                5.1 +/-    0.53       5.2 +/-    0.53  0.050 / 0.050
G24     111.8          19.8                6.3 +/-    0.96      14.0 +/-    0.96  0.040 / 0.070
G27     312.6          26.6                5.6 +/-    1.20      10.5 +/-    1.20  0.090 / 0.160
G29     168.7          21.1                5.4 +/-    1.79      11.6 +/-    1.79  0.080 / 0.150
G32     205.8          19.8                6.3 +/-    2.19      13.9 +/-    2.19  0.040 / 0.040