PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-23:57:30
G02     201.6          31.6               15.8 +/-    1.78      26.7 +/-    1.78  0.190 / 0.130
G06     164.9          64.5               12.9 +/-    0.41      14.2 +/-    0.41  0.280 / 0.150
G12     305.1          11.7                4.8 +/-   19.20      12.8 +/-   19.20  0.040 / 0.020
G17     26.7           56.0                9.0 +/-    0.71      10.6 +/-    0.71  0.040 / 0.020
G19     349.3          67.8               10.9 +/-    0.40      11.7 +/-    0.40  0.110 / 0.080
G24     302.5          35.7               12.2 +/-    2.29      19.2 +/-    2.29  0.100 / 0.090
G28     98.6           33.6               11.2 +/-    1.20      18.2 +/-    1.20  0.050 / 0.130