PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-18:43:10
G07     324.4          54.5               15.5 +/-    0.46      18.6 +/-    0.46  0.030 / 0.050
G08     115.5          50.1               17.6 +/-    0.73      22.1 +/-    0.73  0.040 / 0.050
G09     209.3          79.5               15.9 +/-    0.41      16.1 +/-    0.41  0.060 / 0.060
G16     45.3           10.8               11.1 +/-    3.08      30.4 +/-    3.08  0.050 / 0.060
G23     152.1          43.6               17.8 +/-    0.95      24.5 +/-    0.95  0.040 / 0.040
G27     60.2           33.9               14.0 +/-    1.61      22.6 +/-    1.61  0.040 / 0.050
G28     233.4          25.5               18.4 +/-    3.02      35.6 +/-    3.02  0.230 / 0.400
G30     298.7          33.2               12.8 +/-    1.65      21.0 +/-    1.65  0.140 / 0.350