PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-12:57:30
G01     54.1           27.7                3.0 +/-    0.52       5.4 +/-    0.52  0.090 / 0.420
G06     179.4          20.0                5.8 +/-    0.67      12.7 +/-    0.67  0.110 / 0.370
G11     45.4           16.9                2.8 +/-    1.65       6.6 +/-    1.65  0.070 / 0.110
G13     258.1          32.5                6.6 +/-    1.59      10.9 +/-    1.59  0.050 / 0.110
G15     289.7          16.1                2.5 +/-    2.38       6.1 +/-    2.38  0.150 / 0.260
G17     302.4          79.9                4.5 +/-    0.70       4.5 +/-    0.70  0.100 / 0.220
G19     241.0          58.2                6.2 +/-    0.80       7.2 +/-    0.80  0.040 / 0.050
G28     46.0           54.4                3.5 +/-    1.06       4.2 +/-    1.06  0.040 / 0.050
G30     147.3          47.7                5.3 +/-    0.64       6.9 +/-    0.64  0.030 / 0.020