PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-14:57:30
G03     208.6          55.9                9.3 +/-    0.84      10.9 +/-    0.84  0.050 / 0.070
G07     257.7          15.4                8.0 +/-    2.20      19.6 +/-    2.20  0.040 / 0.060
G09     310.7          28.5                5.5 +/-    1.11       9.9 +/-    1.11  0.030 / 0.050
G16     89.6           64.0                7.8 +/-    0.59       8.6 +/-    0.59  0.040 / 0.040
G22     183.4          36.5                7.1 +/-    1.24      10.9 +/-    1.24  0.070 / 0.250
G23     338.1          65.0                7.4 +/-    0.76       8.1 +/-    0.76  0.080 / 0.290
G26     51.7           40.8                7.9 +/-    0.86      11.3 +/-    0.86  0.030 / 0.050
G27     133.0          11.5                8.6 +/-   13.63      23.2 +/-   13.63  0.030 / 0.050