PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-12:27:50
G01     62.2           31.0                3.7 +/-    0.84       6.3 +/-    0.84  0.070 / 0.130
G06     181.3          12.5                6.4 +/-    1.72      16.9 +/-    1.72  0.050 / 0.160
G07     141.1          22.0                4.1 +/-    0.98       8.7 +/-    0.98  0.100 / 0.370
G11     48.7           23.4                2.5 +/-    0.80       5.0 +/-    0.80  0.100 / 0.390
G13     267.7          35.5                6.5 +/-    1.22      10.2 +/-    1.22  0.040 / 0.050
G15     297.3          15.9                3.4 +/-    1.44       8.3 +/-    1.44  0.050 / 0.050
G17     257.5          77.4                4.5 +/-    0.52       4.6 +/-    0.52  0.020 / 0.030
G19     231.0          50.9                8.0 +/-    1.15       9.9 +/-    1.15  0.030 / 0.030
G28     33.0           57.1                3.0 +/-    0.32       3.5 +/-    0.32  0.050 / 0.090
G30     141.7          55.9                3.5 +/-    0.76       4.1 +/-    0.76  0.040 / 0.090