PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-16:27:50
G10     294.7          50.5                5.7 +/-    0.49       7.1 +/-    0.49  0.050 / 0.070
G14     210.0          10.6               -3.8 +/-   23.88     -10.4 +/-   23.88  0.070 / 0.080
G15     46.1           28.0                4.2 +/-    1.01       7.7 +/-    1.01  0.030 / 0.030
G18     0.2            66.0                5.6 +/-    1.18       6.0 +/-    1.18  0.030 / 0.040
G20     69.4           21.4                4.0 +/-    1.31       8.4 +/-    1.31  0.070 / 0.110
G21     101.4          70.1                7.0 +/-    0.62       7.4 +/-    0.62  0.080 / 0.150
G24     100.3          26.0                7.7 +/-    0.48      14.8 +/-    0.48  0.080 / 0.230
G27     300.6          34.4                7.0 +/-    0.64      11.2 +/-    0.64  0.090 / 0.250
G32     210.4          30.0                9.7 +/-    1.02      17.1 +/-    1.02  0.470 / 0.780