PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-17:42:50
G02     31.8           56.9               14.8 +/-    0.47      17.3 +/-    0.47  0.050 / 0.040
G05     149.5          59.7               16.6 +/-    0.59      18.9 +/-    0.59  0.040 / 0.040
G06     53.5           17.1               11.3 +/-    1.99      26.6 +/-    1.99  0.040 / 0.060
G12     201.0          68.4               13.3 +/-    0.97      14.2 +/-    0.97  0.040 / 0.050
G20     198.1          26.2               15.3 +/-    1.97      29.2 +/-    1.97  0.080 / 0.230
G25     294.3          55.8               14.5 +/-    0.95      17.1 +/-    0.95  0.090 / 0.180
G29     308.8          30.9               12.7 +/-    1.03      21.8 +/-    1.03  0.030 / 0.040