PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-14:58:00
G02     69.0           24.4                9.9 +/-    1.72      19.7 +/-    1.72  0.030 / 0.040
G05     48.6           52.7                9.6 +/-    0.76      11.8 +/-    0.76  0.030 / 0.050
G12     183.9          22.6               10.4 +/-    0.90      21.5 +/-    0.90  0.080 / 0.160
G13     120.7          22.4               12.0 +/-    1.02      24.9 +/-    1.02  0.070 / 0.150
G15     156.8          21.2               12.8 +/-    2.71      27.4 +/-    2.71  0.040 / 0.030
G18     221.3          11.6               -0.4 +/-   17.25      -1.1 +/-   17.25  0.030 / 0.030
G20     217.3          70.2               10.7 +/-    0.51      11.3 +/-    0.51  0.110 / 0.130
G21     281.7          27.3                7.9 +/-    1.20      14.7 +/-    1.20  0.090 / 0.150
G25     222.6          42.9               10.6 +/-    1.53      14.8 +/-    1.53  0.060 / 0.100
G29     343.8          70.4                7.3 +/-    0.38       7.7 +/-    0.38  0.060 / 0.080