PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-15:28:10
G03     207.0          54.7               11.3 +/-    0.55      13.5 +/-    0.55  0.040 / 0.040
G07     258.5          16.1                9.7 +/-    1.18      23.6 +/-    1.18  0.030 / 0.050
G09     311.2          29.3                8.3 +/-    1.31      14.8 +/-    1.31  0.030 / 0.040
G16     87.1           63.9                9.6 +/-    0.52      10.6 +/-    0.52  0.040 / 0.040
G22     183.5          35.8                9.8 +/-    1.39      15.3 +/-    1.39  0.040 / 0.060
G23     338.8          65.5                9.7 +/-    0.49      10.6 +/-    0.49  0.040 / 0.070
G26     51.0           40.1                9.9 +/-    0.95      14.5 +/-    0.95  0.090 / 0.260
G27     132.1          12.2               11.7 +/-    1.85      30.9 +/-    1.85  0.070 / 0.250