PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/21-14:27:50
G01     312.3          29.2                6.0 +/-    1.18      10.7 +/-    1.18  0.120 / 0.120
G10     98.8           43.7                9.0 +/-    0.87      12.3 +/-    0.87  0.100 / 0.110
G11     287.8          27.9                3.5 +/-    1.09       6.5 +/-    1.09  0.040 / 0.030
G14     343.2          69.6                6.2 +/-    0.53       6.5 +/-    0.53  0.030 / 0.030
G18     283.3          50.6               10.1 +/-    3.70      12.6 +/-    3.70  0.040 / 0.040
G20     116.2          18.7                8.9 +/-    2.11      20.3 +/-    2.11  0.040 / 0.050
G22     307.9          22.6                5.5 +/-    0.66      11.4 +/-    0.66  0.050 / 0.050
G25     86.0           13.8                9.1 +/-    3.00      23.3 +/-    3.00  0.050 / 0.040
G31     175.3          54.7               10.1 +/-    0.47      12.1 +/-    0.47  0.040 / 0.070
G32     23.6           59.9                6.9 +/-    1.27       7.8 +/-    1.27  0.040 / 0.060