PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/10-19:12:30
G07     347.9          62.8               15.3 +/-    0.75      17.0 +/-    0.75  0.040 / 0.040
G08     88.8           54.6               16.0 +/-    1.86      19.1 +/-    1.86  0.030 / 0.030
G09     184.6          63.8               16.1 +/-    0.39      17.7 +/-    0.39  0.050 / 0.120
G11     141.1          18.8               19.1 +/-    2.28      43.2 +/-    2.28  0.060 / 0.120
G23     156.9          27.9               16.7 +/-    1.21      30.7 +/-    1.21  0.060 / 0.060
G27     46.8           25.5               13.5 +/-    1.71      26.2 +/-    1.71  0.050 / 0.060
G28     246.1          37.4               18.9 +/-    1.51      28.8 +/-    1.51  0.030 / 0.040
G30     311.4          43.5               13.9 +/-    1.11      19.1 +/-    1.11  0.030 / 0.030