PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-12:57:50
G02     19.7           66.5                5.0 +/-    0.87       5.4 +/-    0.87  0.030 / 0.040
G05     157.9          47.4                9.2 +/-    0.67      12.0 +/-    0.67  0.030 / 0.050
G06     45.7           30.9                3.4 +/-    1.29       5.9 +/-    1.29  0.090 / 0.470
G12     256.4          79.0                5.9 +/-    0.80       6.0 +/-    0.80  0.110 / 0.430
G19     89.0           17.3                6.1 +/-    1.29      14.5 +/-    1.29  0.040 / 0.030
G20     198.4          11.3                0.7 +/-   16.25       1.9 +/-   16.25  0.030 / 0.030
G24     219.1          13.0                4.4 +/-    3.31      11.5 +/-    3.31  0.240 / 0.590
G25     311.5          43.1                6.3 +/-    2.53       8.7 +/-    2.53  0.250 / 0.440
G29     299.4          22.5                5.2 +/-    1.58      10.8 +/-    1.58  0.060 / 0.090