PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-23:42:50
G02     212.3          56.8               14.2 +/-    1.05      16.6 +/-    1.05  0.050 / 0.100
G06     71.7           77.4               11.9 +/-    0.95      12.2 +/-    0.95  0.040 / 0.110
G12     317.1          32.2               11.5 +/-    0.94      19.2 +/-    0.94  0.070 / 0.070
G17     51.2           38.5                9.7 +/-    0.70      14.5 +/-    0.70  0.050 / 0.090
G19     32.7           52.9               10.9 +/-    0.47      13.3 +/-    0.47  0.110 / 0.300
G24     271.4          42.3               12.1 +/-    0.94      17.0 +/-    0.94  0.130 / 0.260
G28     119.8          16.6               12.5 +/-    1.71      29.9 +/-    1.71  0.030 / 0.060