PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-23:42:50
G02     217.7          62.9               11.4 +/-    1.15      12.6 +/-    1.15  0.070 / 0.070
G06     57.3           76.1                9.8 +/-    0.61      10.0 +/-    0.61  0.080 / 0.100
G12     318.0          35.0                8.1 +/-    1.85      12.9 +/-    1.85  0.090 / 0.110
G17     59.0           30.4                8.7 +/-    1.38      15.1 +/-    1.38  0.090 / 0.090
G19     41.3           47.7                9.0 +/-    0.73      11.7 +/-    0.73  0.040 / 0.060
G24     261.2          41.2               11.4 +/-    3.93      16.3 +/-    3.93  0.050 / 0.060
G28     122.6          16.1               13.1 +/-    2.55      31.7 +/-    2.55  0.040 / 0.030