PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-17:27:50
G01     126.9          11.8               16.5 +/-    3.03      44.1 +/-    3.03  0.190 / 0.290
G07     52.0           69.7               15.3 +/-    0.20      16.2 +/-    0.20  0.300 / 0.340
G08     51.5           41.5               12.9 +/-    0.76      18.3 +/-    0.76  0.030 / 0.030
G09     178.2          35.9               15.4 +/-    1.16      24.0 +/-    1.16  0.030 / 0.030
G11     119.2          35.2               16.4 +/-    0.63      25.9 +/-    0.63  0.100 / 0.090
G13     321.1          11.6                3.5 +/-   24.14       9.5 +/-   24.14  0.090 / 0.080
G17     201.0          12.5               13.4 +/-    4.16      35.3 +/-    4.16  0.180 / 0.200
G18     104.0          16.7               14.0 +/-    1.23      33.4 +/-    1.23  0.120 / 0.210
G28     276.9          53.2               15.9 +/-    2.98      19.3 +/-    2.98  0.080 / 0.110
G30     334.4          61.3               14.4 +/-    0.66      16.2 +/-    0.66  0.070 / 0.100