PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/12-14:12:30
G07     18.6           67.4                6.4 +/-    0.62       6.9 +/-    0.62  0.020 / 0.050
G08     71.1           51.0                6.8 +/-    0.44       8.4 +/-    0.44  0.030 / 0.050
G09     181.9          56.1                9.5 +/-    1.77      11.2 +/-    1.77  0.070 / 0.140
G11     133.3          25.4                8.7 +/-    1.46      16.8 +/-    1.46  0.080 / 0.120
G23     158.7          22.0                8.7 +/-    1.43      18.3 +/-    1.43  0.060 / 0.210
G27     43.1           21.5                5.9 +/-    0.75      12.4 +/-    0.75  0.070 / 0.180
G28     250.3          37.4                9.8 +/-    1.81      14.9 +/-    1.81  0.080 / 0.150
G30     318.8          50.1                8.4 +/-    1.24      10.6 +/-    1.24  0.080 / 0.170