PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-17:28:00
G07     15.6           66.9               10.2 +/-    0.56      11.0 +/-    0.56  0.050 / 0.140
G08     72.9           50.7               10.8 +/-    0.37      13.5 +/-    0.37  0.060 / 0.120
G09     182.7          58.9               12.7 +/-    0.68      14.6 +/-    0.68  0.040 / 0.050
G11     134.6          23.7               13.3 +/-    1.66      26.9 +/-    1.66  0.030 / 0.050
G23     159.1          26.5               13.3 +/-    1.16      25.1 +/-    1.16  0.040 / 0.060
G27     44.8           23.9                8.4 +/-    0.85      16.8 +/-    0.85  0.040 / 0.060
G28     248.3          36.4               13.3 +/-    1.56      20.6 +/-    1.56  0.070 / 0.130
G30     315.2          46.9               10.2 +/-    0.60      13.3 +/-    0.60  0.080 / 0.140