PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-17:58:10
G08     293.0          22.7                7.3 +/-    1.04      15.1 +/-    1.04  0.140 / 0.130
G10     7.2            63.1                6.1 +/-    1.08       6.7 +/-    1.08  0.120 / 0.090
G14     230.7          47.0                8.3 +/-    2.29      10.9 +/-    2.29  0.110 / 0.150
G18     66.1           49.4                7.3 +/-    0.95       9.3 +/-    0.95  0.130 / 0.130
G21     145.6          34.4                8.9 +/-    1.02      14.3 +/-    1.02  0.030 / 0.030
G24     56.5           26.2                7.7 +/-    1.93      14.7 +/-    1.93  0.030 / 0.020
G27     252.3          31.1                6.7 +/-    3.67      11.5 +/-    3.67  0.090 / 0.090
G32     246.9          67.4                6.6 +/-    0.60       7.0 +/-    0.60  0.090 / 0.080