PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-22:27:30
G02     200.0          22.0               16.3 +/-    1.82      34.3 +/-    1.82  0.040 / 0.040
G06     170.1          54.7               14.6 +/-    0.70      17.5 +/-    0.70  0.030 / 0.040
G13     227.2          12.9               17.4 +/-    3.01      45.5 +/-    3.01  0.100 / 0.120
G17     15.9           62.6               11.1 +/-    0.81      12.3 +/-    0.81  0.080 / 0.110
G19     320.3          70.8               10.7 +/-    0.33      11.2 +/-    0.33  0.110 / 0.240
G24     309.8          29.8               11.7 +/-    1.40      20.5 +/-    1.40  0.120 / 0.220
G28     88.7           39.2               11.6 +/-    1.22      17.0 +/-    1.22  0.040 / 0.100
G30     156.8          13.2               14.7 +/-    1.52      38.2 +/-    1.52  0.060 / 0.080