PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-18:12:50
G01     84.3           32.9               11.5 +/-    1.02      19.0 +/-    1.02  0.200 / 0.200
G07     129.8          41.5               11.9 +/-    1.00      16.9 +/-    1.00  0.140 / 0.330
G11     63.7           37.9               10.6 +/-    1.85      16.0 +/-    1.85  0.040 / 0.060
G13     288.7          37.2               15.5 +/-    1.74      23.7 +/-    1.74  0.030 / 0.050
G15     312.5          11.5               12.0 +/-    1.21      32.5 +/-    1.21  0.020 / 0.030
G17     219.0          56.0               13.5 +/-    1.30      16.0 +/-    1.30  0.030 / 0.030
G18     59.0           22.8               10.1 +/-    1.17      20.7 +/-    1.17  0.050 / 0.100
G19     217.2          29.9               14.0 +/-    2.56      24.5 +/-    2.56  0.060 / 0.110
G28     359.2          61.3               10.6 +/-    1.23      11.9 +/-    1.23  0.110 / 0.180
G30     118.5          71.7               12.8 +/-    0.82      13.4 +/-    0.82  0.080 / 0.210