PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-18:13:00
G01     128.4          10.7              -12.6 +/-   40.86     -34.7 +/-   40.86  0.040 / 0.050
G07     46.2           69.9               12.2 +/-    0.33      12.9 +/-    0.33  0.050 / 0.050
G08     53.5           43.5               10.4 +/-    0.87      14.3 +/-    0.87  0.030 / 0.040
G09     178.7          38.1               17.4 +/-    1.27      26.1 +/-    1.27  0.030 / 0.040
G11     121.5          34.1               14.2 +/-    1.18      23.0 +/-    1.18  0.150 / 0.400
G17     201.0          10.2               -3.5 +/-   30.60      -9.7 +/-   30.60  0.190 / 0.290
G18     105.8          15.8               12.5 +/-    1.39      30.4 +/-    1.39  0.050 / 0.070
G28     274.1          52.2               13.6 +/-    0.97      16.7 +/-    0.97  0.050 / 0.100
G30     332.7          60.1               12.2 +/-    1.31      13.8 +/-    1.31  0.070 / 0.130