PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-14:42:40
G01     116.0748       19.7565         11.9590 +/-  1.4718   26.4705 +/-  1.4718  0.100 / 0.410
G08     43.5394        27.0831          8.7653 +/-  2.0403   16.3419 +/-  2.0403  0.140 / 0.430
G09     175.4996       21.9066         11.7289 +/-  0.9901   24.6437 +/-  0.9901  0.040 / 0.030
G11     99.3058        39.1663         11.1727 +/-  0.8093   16.4757 +/-  0.8093  0.040 / 0.070
G13     317.1771       20.0423          8.5251 +/-  1.3916   18.7385 +/-  1.3916  0.080 / 0.120
G17     201.7578       29.9947         11.7496 +/-  1.9969   20.5784 +/-  1.9969  0.070 / 0.170
G28     298.5042       58.2395          9.8113 +/-  0.9418   11.3213 +/-  0.9418  0.090 / 0.170
G30     347.0482       68.9909         10.5109 +/-  0.5997   11.1761 +/-  0.5997  0.080 / 0.130