PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-13:58:00
G01     221.9          12.6                6.8 +/-    2.63      17.9 +/-    2.63  0.120 / 0.190
G03     261.5          71.0                7.8 +/-    0.84       8.2 +/-    0.84  0.120 / 0.220
G09     297.8          11.3               -5.8 +/-   28.40     -15.6 +/-   28.40  0.080 / 0.060
G14     90.7           23.7                8.2 +/-    1.75      16.4 +/-    1.75  0.070 / 0.070
G16     138.0          52.0               10.3 +/-    0.68      12.6 +/-    0.68  0.050 / 0.050
G22     193.9          61.5                9.0 +/-    0.61      10.1 +/-    0.61  0.040 / 0.050
G23     315.8          46.4                7.7 +/-    0.98      10.2 +/-    0.98  0.080 / 0.220
G26     82.1           53.4                7.6 +/-    1.01       9.3 +/-    1.01  0.220 / 0.240
G31     48.5           24.9                6.9 +/-    1.60      13.5 +/-    1.60  0.030 / 0.050