PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-14:57:40
G03     208.6          55.9                9.8 +/-    0.59      11.6 +/-    0.59  0.020 / 0.050
G07     257.7          15.4                7.8 +/-    3.29      19.3 +/-    3.29  0.030 / 0.040
G09     310.7          28.5                6.5 +/-    1.78      11.7 +/-    1.78  0.070 / 0.210
G16     89.6           64.0                9.6 +/-    0.62      10.6 +/-    0.62  0.080 / 0.180
G22     183.4          36.5                8.6 +/-    0.53      13.2 +/-    0.53  0.030 / 0.040
G23     338.1          65.0                8.6 +/-    0.59       9.3 +/-    0.59  0.040 / 0.030
G26     51.7           40.8                8.5 +/-    1.27      12.2 +/-    1.27  0.070 / 0.080
G27     133.0          11.5               10.0 +/-    3.11      27.0 +/-    3.11  0.070 / 0.080