PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-23:57:50
G02     200.1          24.2               16.5 +/-    3.71      32.8 +/-    3.71  0.120 / 0.120
G06     170.1          56.3               15.2 +/-    0.83      17.9 +/-    0.83  0.070 / 0.100
G13     226.0          11.7               15.7 +/-    2.22      42.4 +/-    2.22  0.040 / 0.040
G17     18.0           61.4               11.8 +/-    0.78      13.3 +/-    0.78  0.030 / 0.050
G19     328.0          70.5               11.6 +/-    0.80      12.2 +/-    0.80  0.390 / 0.490
G24     308.7          30.9               11.8 +/-    1.32      20.3 +/-    1.32  0.450 / 0.540
G28     90.8           38.1               12.5 +/-    1.32      18.8 +/-    1.32  0.070 / 0.090
G30     156.7          10.9               18.2 +/-    3.67      49.9 +/-    3.67  0.060 / 0.070