PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-14:28:00
G08     277.1          20.1                2.7 +/-    1.62       5.9 +/-    1.62  0.240 / 0.400
G10     46.2           61.2                4.2 +/-    1.50       4.7 +/-    1.50  0.190 / 0.290
G14     251.5          59.9                6.7 +/-    0.92       7.7 +/-    0.92  0.100 / 0.190
G21     152.5          20.2                5.8 +/-    2.28      12.6 +/-    2.28  0.120 / 0.220
G24     43.3           15.7                4.1 +/-    2.36       9.9 +/-    2.36  0.090 / 0.120
G27     236.5          20.4                5.3 +/-    2.99      11.5 +/-    2.99  0.090 / 0.110
G31     179.4          23.6                6.9 +/-    3.22      14.0 +/-    3.22  0.050 / 0.050
G32     312.6          76.3                5.7 +/-    0.29       5.9 +/-    0.29  0.040 / 0.040