PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-16:12:50
G01     82.7           33.0                9.2 +/-    1.83      15.2 +/-    1.83  0.180 / 0.250
G07     130.8          40.1               11.1 +/-    1.61      16.1 +/-    1.61  0.310 / 0.280
G11     61.8           36.8                9.2 +/-    1.11      14.2 +/-    1.11  0.080 / 0.050
G13     287.0          37.5               11.9 +/-    1.52      18.0 +/-    1.52  0.030 / 0.030
G15     312.3          11.3                6.8 +/-    4.19      18.5 +/-    4.19  0.170 / 0.110
G17     220.0          58.8               10.2 +/-    1.37      11.7 +/-    1.37  0.040 / 0.050
G18     57.5           22.2                8.3 +/-    2.32      17.4 +/-    2.32  0.050 / 0.070
G19     217.9          30.4               10.1 +/-    2.84      17.5 +/-    2.84  0.060 / 0.050
G28     1.3            61.1                8.5 +/-    0.54       9.5 +/-    0.54  0.120 / 0.150
G30     120.6          71.5               11.4 +/-    0.45      11.9 +/-    0.45  0.120 / 0.190