PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-17:12:30
G07     314.4          50.0               11.0 +/-    0.68      13.9 +/-    0.68  0.080 / 0.100
G08     124.6          45.2               14.2 +/-    0.63      19.1 +/-    0.63  0.110 / 0.110
G09     264.0          82.7               10.2 +/-    0.65      10.3 +/-    0.65  0.060 / 0.050
G16     43.2           16.9                7.7 +/-    3.25      18.3 +/-    3.25  0.070 / 0.060
G23     147.8          50.9               14.4 +/-    0.80      18.0 +/-    0.80  0.210 / 0.210
G27     69.6           36.4               11.0 +/-    0.71      17.0 +/-    0.71  0.230 / 0.370
G28     228.1          18.8               13.4 +/-    1.57      30.4 +/-    1.57  0.230 / 0.200
G30     292.0          27.6               10.4 +/-    2.29      19.2 +/-    2.29  0.140 / 0.420