PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-18:12:30
G02     207.7          40.8               14.9 +/-    1.27      21.3 +/-    1.27  0.050 / 0.090
G06     130.0          77.9               12.9 +/-    0.82      13.2 +/-    0.82  0.060 / 0.090
G12     313.3          24.4               14.4 +/-    1.91      28.6 +/-    1.91  0.030 / 0.050
G17     47.2           39.9               11.3 +/-    0.58      16.5 +/-    0.58  0.030 / 0.060
G19     23.5           57.5               12.7 +/-    0.46      14.8 +/-    0.46  0.090 / 0.160
G24     288.2          40.9               11.2 +/-    1.04      16.1 +/-    1.04  0.140 / 0.180
G28     111.9          24.2               10.1 +/-    0.88      20.0 +/-    0.88  0.040 / 0.060