PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-18:28:10
G02     60.2           32.4               11.8 +/-    1.15      19.7 +/-    1.15  0.070 / 0.110
G05     60.8           64.6               13.3 +/-    0.49      14.5 +/-    0.49  0.040 / 0.100
G12     185.3          31.8               15.0 +/-    2.27      25.4 +/-    2.27  0.120 / 0.240
G13     129.2          15.7               18.1 +/-    2.51      44.3 +/-    2.51  0.120 / 0.220
G15     163.4          12.6               18.3 +/-    2.13      48.3 +/-    2.13  0.040 / 0.070
G20     208.1          61.4               18.1 +/-    0.81      20.3 +/-    0.81  0.040 / 0.070
G21     272.3          19.2               13.3 +/-    1.75      29.8 +/-    1.75  0.040 / 0.040
G25     230.8          50.5               15.5 +/-    0.75      19.5 +/-    0.75  0.040 / 0.050
G29     332.7          59.5               10.6 +/-    0.76      12.1 +/-    0.76  0.030 / 0.040