PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-16:43:00
G02     63.1           30.0                7.8 +/-    1.94      13.7 +/-    1.94  0.120 / 0.220
G05     52.8           58.6               10.1 +/-    1.13      11.6 +/-    1.13  0.130 / 0.270
G12     182.3          26.6                9.2 +/-    2.18      17.4 +/-    2.18  0.080 / 0.200
G13     122.2          18.5               10.6 +/-    1.76      24.2 +/-    1.76  0.110 / 0.210
G15     160.8          16.9               13.2 +/-    2.34      31.3 +/-    2.34  0.160 / 0.230
G21     275.9          19.8                7.9 +/-    1.80      17.5 +/-    1.80  0.180 / 0.260
G25     230.5          48.3                9.5 +/-    2.80      12.3 +/-    2.80  0.030 / 0.040
G29     331.9          59.1                8.9 +/-    0.68      10.2 +/-    0.68  0.030 / 0.040