PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-23:13:10
G02     199.9          22.7               18.2 +/-    2.78      37.5 +/-    2.78  0.040 / 0.040
G06     170.3          55.0               15.0 +/-    0.94      17.9 +/-    0.94  0.060 / 0.040
G13     227.0          12.6               16.2 +/-    2.51      42.6 +/-    2.51  0.140 / 0.210
G17     15.0           62.9               13.4 +/-    0.81      14.8 +/-    0.81  0.240 / 0.220
G19     322.6          70.8               11.9 +/-    0.44      12.5 +/-    0.44  0.050 / 0.090
G24     309.6          30.0               11.6 +/-    1.07      20.4 +/-    1.07  0.060 / 0.070
G28     89.2           38.9               13.1 +/-    1.08      19.4 +/-    1.08  0.100 / 0.110
G30     156.7          12.4               17.8 +/-    3.38      47.1 +/-    3.38  0.090 / 0.110