PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/09-18:58:30
G05     46.1           24.9                9.4 +/-    0.64      18.3 +/-    0.64  0.070 / 0.090
G13     84.5           35.0               13.3 +/-    0.64      21.2 +/-    0.64  0.080 / 0.120
G15     136.5          46.6               15.2 +/-    1.12      20.0 +/-    1.12  0.120 / 0.420
G20     242.0          31.9               14.7 +/-    1.38      24.7 +/-    1.38  0.170 / 0.290
G21     306.0          41.2               11.3 +/-    0.92      16.2 +/-    0.92  0.060 / 0.120
G25     204.0          18.0               15.0 +/-    2.30      34.6 +/-    2.30  0.070 / 0.140
G26     295.4          20.1               11.6 +/-    2.19      25.5 +/-    2.19  0.040 / 0.060
G29     139.1          81.7               11.4 +/-    0.56      11.5 +/-    0.56  0.040 / 0.050