PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-15:43:10
G02     31.0           56.4                6.7 +/-    0.55       7.9 +/-    0.55  0.040 / 0.050
G05     143.5          61.5                9.3 +/-    0.38      10.4 +/-    0.38  0.040 / 0.060
G06     53.7           14.6                5.8 +/-    1.08      14.5 +/-    1.08  0.030 / 0.040
G12     196.2          67.7                5.8 +/-    1.33       6.2 +/-    1.33  0.050 / 0.050
G25     297.6          52.7                7.0 +/-    1.60       8.6 +/-    1.60  0.040 / 0.040
G29     306.9          27.5                3.9 +/-    2.15       7.3 +/-    2.15  0.030 / 0.030