PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-17:57:40
G01     125.0          13.4               15.2 +/-    2.46      39.3 +/-    2.46  0.040 / 0.050
G07     59.5           69.3               12.0 +/-    0.57      12.8 +/-    0.57  0.040 / 0.050
G08     49.8           39.8               10.9 +/-    1.41      16.0 +/-    1.41  0.030 / 0.040
G09     178.0          33.5               15.4 +/-    0.93      25.2 +/-    0.93  0.040 / 0.050
G11     116.7          36.5               13.6 +/-    0.64      21.0 +/-    0.64  0.050 / 0.070
G13     320.5          13.6               10.6 +/-    2.49      27.2 +/-    2.49  0.050 / 0.060
G17     201.4          14.6               15.8 +/-    0.92      39.7 +/-    0.92  0.070 / 0.130
G18     101.7          17.8               13.7 +/-    1.69      31.7 +/-    1.69  0.060 / 0.110
G28     280.9          54.4               14.8 +/-    0.80      17.8 +/-    0.80  0.040 / 0.040
G30     337.8          63.5               12.2 +/-    0.73      13.4 +/-    0.73  0.030 / 0.040