PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-17:42:30
G02     53.4           39.1                7.7 +/-    1.03      11.4 +/-    1.03  0.090 / 0.610
G05     70.1           67.4                7.8 +/-    0.26       8.4 +/-    0.26  0.150 / 0.530
G12     183.2          35.3                9.7 +/-    1.13      15.4 +/-    1.13  0.050 / 0.080
G13     131.4          12.0               10.1 +/-    2.76      27.1 +/-    2.76  0.050 / 0.090
G21     267.7          14.4                8.8 +/-    3.03      22.1 +/-    3.03  0.030 / 0.030
G25     240.2          54.7                7.6 +/-    1.70       9.1 +/-    1.70  0.030 / 0.020
G29     324.9          49.4                7.1 +/-    0.30       9.0 +/-    0.30  0.080 / 0.090