PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/22-18:27:40
G02     52.9           38.7                7.7 +/-    0.44      11.4 +/-    0.44  0.270 / 0.820
G05     70.1           66.6                7.6 +/-    0.37       8.2 +/-    0.37  0.250 / 0.450
G12     185.5          39.7               12.1 +/-    1.83      17.6 +/-    1.83  0.090 / 0.090
G13     131.3          10.9               -3.5 +/-   26.33      -9.5 +/-   26.33  0.060 / 0.090
G21     266.5          12.7                8.5 +/-    8.14      22.2 +/-    8.14  0.060 / 0.060
G25     248.4          55.7               10.3 +/-    0.67      12.2 +/-    0.67  0.050 / 0.060
G29     324.6          48.8                9.1 +/-    1.10      11.7 +/-    1.10  0.030 / 0.030