PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-17:12:30
G07     357.8          65.2               13.2 +/-    0.73      14.4 +/-    0.73  0.040 / 0.040
G08     77.0           52.9               14.4 +/-    1.03      17.6 +/-    1.03  0.040 / 0.040
G09     181.7          57.7               13.8 +/-    0.96      16.0 +/-    0.96  0.050 / 0.070
G11     136.7          22.5               13.9 +/-    1.30      28.8 +/-    1.30  0.070 / 0.060
G23     157.6          22.2               13.2 +/-    1.28      27.5 +/-    1.28  0.030 / 0.040
G27     43.8           22.2               10.5 +/-    1.93      22.0 +/-    1.93  0.030 / 0.040
G28     251.1          40.9               13.2 +/-    2.41      18.9 +/-    2.41  0.050 / 0.110
G30     314.8          46.1               12.4 +/-    0.73      16.5 +/-    0.73  0.050 / 0.170