PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-16:12:40
G03     185.3          13.3               11.1 +/-    3.15      28.6 +/-    3.15  0.140 / 0.140
G07     300.5          45.6               12.9 +/-    3.07      17.2 +/-    3.07  0.130 / 0.210
G08     136.6          32.5               13.3 +/-    0.83      22.2 +/-    0.83  0.070 / 0.090
G09     318.7          67.0               12.1 +/-    0.36      13.0 +/-    0.36  0.090 / 0.080
G16     42.5           37.3               10.2 +/-    1.36      15.5 +/-    1.36  0.050 / 0.030
G23     129.8          74.7               12.8 +/-    0.44      13.2 +/-    0.44  0.060 / 0.030
G27     95.3           35.7               11.0 +/-    1.29      17.3 +/-    1.29  0.410 / 0.460
G30     278.4          17.1               12.0 +/-    7.25      28.4 +/-    7.25  0.200 / 0.360