PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-18:57:50
G07     34.7           69.7               11.3 +/-    0.77      12.0 +/-    0.77  0.150 / 0.270
G08     57.7           46.7               10.9 +/-    0.87      14.3 +/-    0.87  0.170 / 0.310
G09     179.3          42.3               13.2 +/-    0.63      18.6 +/-    0.63  0.040 / 0.070
G11     125.5          31.7               13.0 +/-    1.17      21.9 +/-    1.17  0.040 / 0.060
G18     109.1          13.9               13.0 +/-    2.40      33.1 +/-    2.40  0.030 / 0.030
G27     38.0           11.0               10.0 +/-    2.24      27.2 +/-    2.24  0.030 / 0.030
G28     268.8          50.2               12.1 +/-    2.78      15.2 +/-    2.78  0.030 / 0.040
G30     329.1          57.5               10.7 +/-    0.42      12.5 +/-    0.42  0.030 / 0.040