PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-19:27:40
G02     60.5           32.5               13.1 +/-    1.27      21.9 +/-    1.27  0.040 / 0.120
G05     60.3           64.8               14.1 +/-    0.64      15.4 +/-    0.64  0.060 / 0.110
G12     184.9          30.7               15.8 +/-    1.13      27.2 +/-    1.13  0.110 / 0.310
G13     128.8          16.2               18.1 +/-    1.42      43.7 +/-    1.42  0.090 / 0.260
G15     163.3          12.9               19.9 +/-    4.06      51.9 +/-    4.06  0.050 / 0.060
G20     208.2          62.6               16.1 +/-    0.67      17.9 +/-    0.67  0.050 / 0.070
G21     272.7          19.2               12.8 +/-    1.69      28.7 +/-    1.69  0.030 / 0.070
G25     228.9          49.7               15.7 +/-    0.81      19.8 +/-    0.81  0.030 / 0.040
G29     332.5          59.6               13.6 +/-    0.68      15.4 +/-    0.68  0.040 / 0.060