PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-16:58:10
G02     63.6           29.2                8.6 +/-    0.72      15.2 +/-    0.72  0.040 / 0.040
G05     54.6           60.1                8.9 +/-    0.57      10.1 +/-    0.57  0.030 / 0.040
G12     184.9          28.5               11.2 +/-    3.27      20.2 +/-    3.27  0.080 / 0.310
G13     126.2          18.2               12.1 +/-    1.80      27.8 +/-    1.80  0.090 / 0.210
G15     160.9          15.8               14.3 +/-    3.31      34.9 +/-    3.31  0.140 / 0.100
G20     210.9          64.6               12.4 +/-    0.62      13.6 +/-    0.62  0.080 / 0.130
G21     275.7          22.2                9.3 +/-    2.09      19.4 +/-    2.09  0.030 / 0.050
G25     227.7          47.8               12.0 +/-    1.13      15.6 +/-    1.13  0.040 / 0.050
G29     337.3          64.2                9.1 +/-    0.78      10.0 +/-    0.78  0.050 / 0.080