PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-18:57:50
G01     68.9           32.4               10.9 +/-    0.70      18.2 +/-    0.70  0.050 / 0.050
G07     137.6          24.0               13.7 +/-    0.60      27.5 +/-    0.60  0.050 / 0.050
G11     52.1           29.5                9.6 +/-    1.59      16.9 +/-    1.59  0.110 / 0.300
G13     272.1          38.2               11.7 +/-    1.25      17.5 +/-    1.25  0.130 / 0.320
G15     300.8          15.8                7.3 +/-    2.16      17.9 +/-    2.16  0.070 / 0.070
G17     234.0          70.0               13.2 +/-    1.28      13.9 +/-    1.28  0.080 / 0.080
G18     46.7           16.5                8.4 +/-    1.32      20.2 +/-    1.32  0.060 / 0.070
G19     224.2          43.6               13.6 +/-    1.28      18.7 +/-    1.28  0.050 / 0.080
G28     12.0           60.6               11.0 +/-    0.53      12.4 +/-    0.53  0.080 / 0.120
G30     136.7          58.2               12.6 +/-    0.65      14.6 +/-    0.65  0.070 / 0.130