PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-19:42:40
G07     4.6            66.6               12.1 +/-    0.70      13.0 +/-    0.70  0.030 / 0.040
G08     74.8           53.4               12.2 +/-    0.76      14.8 +/-    0.76  0.030 / 0.040
G09     181.6          54.8               13.3 +/-    0.46      15.9 +/-    0.46  0.050 / 0.050
G11     135.3          24.2               16.9 +/-    2.15      33.6 +/-    2.15  0.050 / 0.070
G23     158.3          20.0               13.7 +/-    2.53      30.0 +/-    2.53  0.090 / 0.240
G27     42.0           19.7               10.0 +/-    1.95      22.2 +/-    1.95  0.090 / 0.220
G28     254.7          43.2               14.1 +/-    3.14      19.5 +/-    3.14  0.030 / 0.040
G30     318.7          49.5               12.0 +/-    0.75      15.2 +/-    0.75  0.030 / 0.040