PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/09-08:43:10
G02     56.0           34.8                2.6 +/-    0.77       4.2 +/-    0.77  0.040 / 0.060
G05     67.8           64.8                4.6 +/-    0.25       5.0 +/-    0.25  0.050 / 0.050
G12     187.7          40.5                6.3 +/-    1.54       9.1 +/-    1.54  0.040 / 0.030
G13     133.7          11.0               -1.3 +/-   19.52      -3.6 +/-   19.52  0.040 / 0.030
G20     207.3          48.0                7.0 +/-    1.03       9.1 +/-    1.03  0.050 / 0.080
G21     267.1          15.6                3.1 +/-    0.66       7.5 +/-    0.66  0.040 / 0.090
G25     248.5          55.5                6.1 +/-    1.29       7.2 +/-    1.29  0.050 / 0.060
G29     325.5          50.4                4.2 +/-    1.17       5.3 +/-    1.17  0.060 / 0.050