PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-13:57:40
G03     206.3          57.3                9.6 +/-    1.63      11.2 +/-    1.63  0.090 / 0.160
G07     257.8          20.1                7.5 +/-    1.46      16.6 +/-    1.46  0.070 / 0.180
G09     309.1          25.8                4.9 +/-    1.15       9.4 +/-    1.15  0.030 / 0.040
G16     107.9          64.6                9.1 +/-    0.30      10.0 +/-    0.30  0.030 / 0.040
G22     185.8          40.1                8.7 +/-    1.20      12.7 +/-    1.20  0.050 / 0.090
G23     329.2          59.0                5.5 +/-    0.50       6.2 +/-    0.50  0.050 / 0.080
G26     56.8           46.4                5.2 +/-    0.62       6.8 +/-    0.62  0.040 / 0.060
G31     58.5           11.5                6.1 +/-    2.77      16.4 +/-    2.77  0.040 / 0.060