PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-22:27:50
G01     73.1           32.9                9.1 +/-    1.35      15.1 +/-    1.35  0.110 / 0.120
G07     135.9          28.1               12.1 +/-    1.20      22.0 +/-    1.20  0.100 / 0.130
G11     54.0           31.3                8.1 +/-    1.60      13.7 +/-    1.60  0.100 / 0.080
G13     276.6          38.4                9.6 +/-    1.00      14.4 +/-    1.00  0.080 / 0.090
G15     303.9          15.0                6.0 +/-    1.74      14.9 +/-    1.74  0.070 / 0.080
G17     229.0          68.9               10.6 +/-    0.84      11.2 +/-    0.84  0.050 / 0.090
G18     48.5           17.4                7.6 +/-    1.71      17.9 +/-    1.71  0.050 / 0.040
G19     221.9          39.7               11.5 +/-    1.66      16.9 +/-    1.66  0.040 / 0.050
G28     7.8            60.9                8.3 +/-    1.24       9.4 +/-    1.24  0.030 / 0.040
G30     133.2          63.4               10.3 +/-    0.48      11.3 +/-    0.48  0.030 / 0.030