PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-17:27:30
G02     200.8          19.1               14.4 +/-    1.75      32.3 +/-    1.75  0.170 / 0.350
G06     168.6          55.0               13.2 +/-    1.15      15.8 +/-    1.15  0.170 / 0.270
G13     227.3          13.2               13.2 +/-    2.87      34.4 +/-    2.87  0.120 / 0.100
G17     21.0           60.3               10.5 +/-    0.92      11.9 +/-    0.92  0.110 / 0.120
G19     312.4          70.4                9.9 +/-    0.65      10.4 +/-    0.65  0.040 / 0.040
G24     309.6          30.4               10.7 +/-    1.73      18.6 +/-    1.73  0.040 / 0.040
G28     87.6           39.9               11.6 +/-    1.53      16.9 +/-    1.53  0.260 / 0.700
G30     157.4          15.5               11.9 +/-    2.14      29.1 +/-    2.14  0.110 / 0.420