PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-15:43:10
G02     200.7          13.8               15.6 +/-    3.01      40.0 +/-    3.01  0.090 / 0.180
G06     172.7          48.6               16.3 +/-    0.71      20.9 +/-    0.71  0.070 / 0.180
G13     232.6          16.4               13.0 +/-    2.04      31.2 +/-    2.04  0.140 / 0.210
G17     20.4           61.5               13.0 +/-    0.68      14.6 +/-    0.68  0.150 / 0.200
G19     314.0          72.1               13.0 +/-    0.64      13.6 +/-    0.64  0.090 / 0.410
G24     313.9          24.6               10.2 +/-    1.37      20.0 +/-    1.37  0.080 / 0.360
G28     83.0           42.1               12.1 +/-    0.49      17.0 +/-    0.49  0.030 / 0.040
G30     156.9          20.9               14.1 +/-    2.02      30.4 +/-    2.02  0.030 / 0.040