PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-16:57:40
G02     53.3           38.1                7.1 +/-    0.87      10.7 +/-    0.87  0.300 / 0.340
G05     71.5           67.4                8.7 +/-    0.50       9.4 +/-    0.50  0.200 / 0.360
G12     184.7          39.0                9.5 +/-    0.66      14.0 +/-    0.66  0.170 / 0.470
G13     131.3          10.9                8.8 +/-   15.92      24.2 +/-   15.92  0.270 / 0.450
G21     266.6          12.7                4.1 +/-   17.31      10.7 +/-   17.31  0.050 / 0.060
G25     248.3          55.6                8.2 +/-    2.25       9.8 +/-    2.25  0.050 / 0.060
G29     324.3          48.4                7.1 +/-    0.57       9.2 +/-    0.57  0.070 / 0.060