PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-20:27:40
G01     48.3           24.1               10.1 +/-    0.97      20.2 +/-    0.97  0.030 / 0.070
G06     178.6          24.5               18.3 +/-    1.72      36.2 +/-    1.72  0.040 / 0.050
G11     43.9           13.1                8.7 +/-    2.63      22.7 +/-    2.63  0.110 / 0.320
G13     247.8          30.1               14.9 +/-    1.50      26.1 +/-    1.50  0.110 / 0.320
G15     281.2          15.6               12.6 +/-    2.20      31.0 +/-    2.20  0.050 / 0.130
G17     324.2          78.4               12.3 +/-    0.69      12.5 +/-    0.69  0.070 / 0.120
G19     248.8          61.7               14.2 +/-    0.74      15.9 +/-    0.74  0.120 / 0.230
G28     48.5           55.1               10.7 +/-    0.70      12.7 +/-    0.70  0.130 / 0.240
G30     149.9          37.8               14.9 +/-    1.28      22.5 +/-    1.28  0.040 / 0.040