PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-21:57:50
G02     201.8          30.8               13.3 +/-    0.88      22.9 +/-    0.88  0.070 / 0.100
G06     168.7          62.5               13.9 +/-    0.95      15.5 +/-    0.95  0.080 / 0.100
G17     32.3           52.0               10.2 +/-    0.39      12.5 +/-    0.39  0.040 / 0.110
G19     351.9          67.6                9.9 +/-    0.46      10.6 +/-    0.46  0.050 / 0.100
G24     301.3          36.5               10.3 +/-    0.61      16.0 +/-    0.61  0.080 / 0.160
G28     95.5           37.8               11.2 +/-    0.83      17.0 +/-    0.83  0.070 / 0.140