PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-11:58:10
G07     316.9          52.6                4.3 +/-    1.11       5.3 +/-    1.11  0.040 / 0.040
G08     125.5          43.3                5.4 +/-    0.55       7.5 +/-    0.55  0.050 / 0.050
G09     287.9          81.1                4.3 +/-    0.22       4.3 +/-    0.22  0.060 / 0.070
G16     42.8           20.8                4.5 +/-    2.52       9.7 +/-    2.52  0.050 / 0.060
G23     146.5          55.7                7.2 +/-    0.75       8.5 +/-    0.75  0.170 / 0.240
G27     74.9           37.3                5.1 +/-    0.79       7.8 +/-    0.79  0.140 / 0.270
G30     290.3          26.9                7.1 +/-    1.11      13.2 +/-    1.11  0.030 / 0.020