PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/24-23:57:50
G02     209.5          52.5               13.2 +/-    0.68      16.1 +/-    0.68  0.030 / 0.030
G06     95.1           79.4               10.7 +/-    0.41      10.9 +/-    0.41  0.030 / 0.030
G12     315.4          28.2                9.0 +/-    1.38      16.3 +/-    1.38  0.090 / 0.110
G17     47.0           41.6                9.7 +/-    1.00      13.8 +/-    1.00  0.090 / 0.100
G19     27.1           55.6               10.5 +/-    1.48      12.4 +/-    1.48  0.080 / 0.060
G24     277.6          42.4               11.5 +/-    1.41      16.1 +/-    1.41  0.100 / 0.070
G28     116.6          19.7               12.6 +/-    2.41      28.0 +/-    2.41  0.110 / 0.240