PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-16:57:50
G10     253.7          28.5               12.7 +/-    2.37      23.0 +/-    2.37  0.040 / 0.030
G13     51.3           29.0                9.7 +/-    1.73      17.3 +/-    1.73  0.030 / 0.040
G15     77.5           55.6               10.6 +/-    1.24      12.6 +/-    1.24  0.060 / 0.050
G16     297.4          13.3                8.1 +/-    4.21      20.9 +/-    4.21  0.050 / 0.060
G18     276.7          59.5               11.9 +/-    2.05      13.6 +/-    2.05  0.080 / 0.440
G20     43.9           47.3                9.5 +/-    0.97      12.4 +/-    0.97  0.150 / 0.350
G21     346.2          65.6               10.9 +/-    0.71      11.8 +/-    0.71  0.110 / 0.330
G26     267.8          13.9                9.0 +/-    2.72      23.0 +/-    2.72  0.080 / 0.310
G29     163.2          40.5               13.7 +/-    1.21      19.8 +/-    1.21  0.110 / 0.200