PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-00:28:00
G07     4.4            66.4                6.7 +/-    0.61       7.2 +/-    0.61  0.110 / 0.090
G08     71.2           51.2                7.3 +/-    1.06       9.1 +/-    1.06  0.140 / 0.110
G09     182.0          55.7                9.7 +/-    0.57      11.5 +/-    0.57  0.110 / 0.350
G11     135.7          23.6               10.2 +/-    2.52      20.6 +/-    2.52  0.090 / 0.220
G23     159.4          23.5               11.2 +/-    1.80      22.7 +/-    1.80  0.040 / 0.040
G27     42.2           19.8                4.6 +/-    2.15      10.1 +/-    2.15  0.050 / 0.040
G28     254.2          43.1                8.6 +/-    2.75      11.9 +/-    2.75  0.030 / 0.040
G30     319.5          50.2                6.0 +/-    0.57       7.5 +/-    0.57  0.040 / 0.040