PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/23-11:58:10
G07     307.7          48.6                4.3 +/-    2.09       5.5 +/-    2.09  0.160 / 0.080
G08     133.0          37.6                5.4 +/-    0.54       8.2 +/-    0.54  0.070 / 0.080
G09     311.9          74.5                4.9 +/-    0.66       5.0 +/-    0.66  0.070 / 0.060
G16     42.0           27.6                2.5 +/-    2.16       4.5 +/-    2.16  0.070 / 0.060
G23     140.4          63.8                6.1 +/-    0.52       6.7 +/-    0.52  0.030 / 0.040
G27     84.9           37.2                5.7 +/-    0.77       8.7 +/-    0.77  0.030 / 0.040
G30     284.5          22.5                5.3 +/-    2.25      11.0 +/-    2.25  0.030 / 0.020