PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-22:42:50
G02     219.4          64.5               17.8 +/-    0.89      19.5 +/-    0.89  0.070 / 0.070
G06     49.9           70.2               15.6 +/-    0.44      16.4 +/-    0.44  0.070 / 0.100
G12     319.9          40.2               13.8 +/-    0.88      20.0 +/-    0.88  0.040 / 0.080
G17     58.8           32.5               13.3 +/-    1.02      22.1 +/-    1.02  0.030 / 0.070
G19     42.1           48.0               14.3 +/-    0.55      18.6 +/-    0.55  0.170 / 0.420
G24     260.0          40.6               18.3 +/-    1.14      26.3 +/-    1.14  0.140 / 0.340
G28     125.2          10.6               19.8 +/-    4.55      54.6 +/-    4.55  0.040 / 0.050