PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/02-17:42:50
G02     57.1           34.9               14.0 +/-    0.94      22.3 +/-    0.94  0.030 / 0.060
G05     68.2           67.1               14.1 +/-    0.59      15.2 +/-    0.59  0.030 / 0.060
G12     186.4          36.3               16.7 +/-    1.49      25.8 +/-    1.49  0.040 / 0.090
G13     132.2          12.9               17.4 +/-    2.84      45.6 +/-    2.84  0.050 / 0.080
G20     206.1          56.6               16.4 +/-    0.92      19.2 +/-    0.92  0.160 / 0.490
G21     269.2          17.0               15.0 +/-    2.67      35.4 +/-    2.67  0.140 / 0.540
G25     237.3          53.5               15.0 +/-    1.40      18.1 +/-    1.40  0.090 / 0.620
G29     330.1          56.0               13.9 +/-    0.77      16.4 +/-    0.77  0.100 / 0.540