PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-16:27:30
G02     201.1          19.2               17.2 +/-    1.57      38.5 +/-    1.57  0.160 / 0.270
G06     168.0          55.8               16.7 +/-    1.05      19.7 +/-    1.05  0.190 / 0.330
G13     226.8          12.8               14.5 +/-    5.14      38.0 +/-    5.14  0.100 / 0.310
G17     22.8           59.3               13.0 +/-    0.39      14.9 +/-    0.39  0.090 / 0.280
G19     313.4          70.3               13.0 +/-    0.62      13.7 +/-    0.62  0.040 / 0.100
G24     309.0          31.0               13.3 +/-    1.14      22.7 +/-    1.14  0.040 / 0.090
G28     88.2           39.6               13.6 +/-    0.64      19.9 +/-    0.64  0.060 / 0.130
G30     157.6          15.3               14.4 +/-    0.98      35.6 +/-    0.98  0.060 / 0.190