PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-21:42:50
G01     65.3           32.1               14.0 +/-    0.37      23.4 +/-    0.37  0.050 / 0.080
G06     181.2          11.0                6.8 +/-   63.85      18.6 +/-   63.85  0.050 / 0.090
G07     140.1          27.1               18.3 +/-    2.04      34.1 +/-    2.04  0.060 / 0.120
G11     51.6           28.7               11.4 +/-    1.40      20.5 +/-    1.40  0.060 / 0.100
G13     268.8          36.6               16.4 +/-    1.24      25.3 +/-    1.24  0.050 / 0.160
G15     298.2          16.1               13.6 +/-    2.11      32.8 +/-    2.11  0.050 / 0.180
G18     45.9           16.1               10.7 +/-    1.31      25.8 +/-    1.31  0.030 / 0.050
G19     228.1          45.6               20.1 +/-    1.47      26.9 +/-    1.47  0.040 / 0.050
G28     28.6           57.9               13.0 +/-    0.50      15.0 +/-    0.50  0.060 / 0.130
G30     139.8          55.2               16.0 +/-    1.08      19.0 +/-    1.08  0.050 / 0.120