PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-16:58:00
G02     61.0           31.9                8.9 +/-    0.54      15.0 +/-    0.54  0.030 / 0.040
G05     55.4           60.6                9.7 +/-    0.84      11.0 +/-    0.84  0.030 / 0.040
G12     182.9          29.2               10.9 +/-    2.48      19.4 +/-    2.48  0.110 / 0.280
G13     124.2          16.9               11.7 +/-    1.41      27.7 +/-    1.41  0.090 / 0.260
G15     162.4          14.8               12.2 +/-    1.59      30.5 +/-    1.59  0.070 / 0.360
G21     273.9          18.3                9.7 +/-    0.85      22.3 +/-    0.85  0.070 / 0.350
G25     233.7          50.1               10.9 +/-    0.79      13.7 +/-    0.79  0.050 / 0.130
G29     330.3          56.8                6.9 +/-    1.29       8.1 +/-    1.29  0.070 / 0.130