PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-21:12:40
G01     82.0           33.1               15.6 +/-    0.65      25.6 +/-    0.65  0.060 / 0.100
G07     131.3          39.9               16.5 +/-    1.04      24.0 +/-    1.04  0.060 / 0.100
G11     62.8           37.7               13.0 +/-    1.12      19.7 +/-    1.12  0.040 / 0.140
G13     286.7          37.3               15.3 +/-    1.65      23.2 +/-    1.65  0.040 / 0.130
G15     310.2          12.8               11.8 +/-    1.39      31.0 +/-    1.39  0.040 / 0.100
G18     57.5           22.3               11.1 +/-    1.31      23.1 +/-    1.31  0.040 / 0.120
G19     218.2          32.7               19.8 +/-    1.94      32.8 +/-    1.94  0.040 / 0.050
G28     3.4            61.0               14.4 +/-    0.50      16.2 +/-    0.50  0.030 / 0.050
G30     123.0          68.6               15.8 +/-    0.83      16.8 +/-    0.83  0.030 / 0.070