PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-20:27:50
G01     97.6           29.8               13.2 +/-    0.78      23.3 +/-    0.78  0.110 / 0.220
G07     118.7          51.6               14.7 +/-    0.40      18.2 +/-    0.40  0.100 / 0.270
G08     42.1           16.1               10.5 +/-    2.09      25.4 +/-    2.09  0.060 / 0.150
G11     78.6           42.6               14.0 +/-    0.69      19.5 +/-    0.69  0.060 / 0.140
G13     301.8          33.3               12.7 +/-    1.38      20.9 +/-    1.38  0.040 / 0.050
G17     211.3          42.5               15.2 +/-    0.83      21.2 +/-    0.83  0.040 / 0.050
G18     71.1           24.8               13.0 +/-    0.61      25.5 +/-    0.61  0.030 / 0.050
G19     212.1          20.3               16.3 +/-    2.87      35.5 +/-    2.87  0.030 / 0.060
G28     337.0          61.9               12.7 +/-    0.58      14.2 +/-    0.58  0.050 / 0.090
G30     81.4           78.2               13.7 +/-    0.67      14.0 +/-    0.67  0.040 / 0.080