PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/07-20:42:40
G07     315.3          50.4               10.3 +/-    1.04      12.9 +/-    1.04  0.170 / 0.470
G08     123.3          45.7               14.7 +/-    0.52      19.6 +/-    0.52  0.220 / 0.320
G09     263.2          82.5               13.4 +/-    0.73      13.5 +/-    0.73  0.040 / 0.050
G16     43.2           17.7                9.0 +/-    3.36      20.9 +/-    3.36  0.040 / 0.070
G23     149.0          53.1               12.1 +/-    0.51      14.7 +/-    0.51  0.120 / 0.230
G27     68.5           36.1               10.8 +/-    0.78      16.7 +/-    0.78  0.260 / 0.510
G28     228.5          19.6               13.1 +/-    1.80      29.2 +/-    1.80  0.050 / 0.050
G30     293.5          29.7               11.4 +/-    2.17      20.1 +/-    2.17  0.040 / 0.060