PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-19:57:40
G01     62.5           31.4               12.3 +/-    2.08      21.0 +/-    2.08  0.110 / 0.260
G07     141.3          24.7               15.6 +/-    1.32      30.7 +/-    1.32  0.160 / 0.290
G11     49.8           26.2               10.4 +/-    1.81      19.8 +/-    1.81  0.040 / 0.030
G13     265.5          35.9               16.9 +/-    1.67      26.4 +/-    1.67  0.040 / 0.030
G15     296.4          16.1               13.0 +/-    1.05      31.6 +/-    1.05  0.080 / 0.140
G17     246.9          71.7               16.7 +/-    0.55      17.5 +/-    0.55  0.080 / 0.130
G18     44.0           14.5               10.2 +/-    1.90      25.6 +/-    1.90  0.100 / 0.270
G19     230.3          47.2               16.8 +/-    2.25      21.9 +/-    2.25  0.120 / 0.370
G28     32.5           57.3               16.5 +/-    0.89      19.2 +/-    0.89  0.030 / 0.040
G30     141.9          53.6               16.9 +/-    0.39      20.5 +/-    0.39  0.030 / 0.050