PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-14:57:50
G01     90.3           31.8               12.9 +/-    0.96      21.7 +/-    0.96  0.030 / 0.020
G07     125.4          45.7               13.7 +/-    0.66      18.2 +/-    0.66  0.030 / 0.020
G11     68.3           39.5               12.2 +/-    1.23      17.9 +/-    1.23  0.040 / 0.040
G13     294.6          36.1               11.8 +/-    2.17      18.3 +/-    2.17  0.050 / 0.050
G17     214.4          53.3               14.0 +/-    0.85      17.0 +/-    0.85  0.070 / 0.100
G18     63.7           23.8               11.9 +/-    2.14      24.0 +/-    2.14  0.080 / 0.120
G19     214.8          24.3               12.7 +/-    2.15      25.1 +/-    2.15  0.070 / 0.110
G28     348.7          61.8               12.3 +/-    0.51      13.8 +/-    0.51  0.050 / 0.120
G30     101.9          76.9               14.4 +/-    0.32      14.7 +/-    0.32  0.070 / 0.090