PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-19:27:50
G01     114.6          20.4               12.5 +/-    1.32      27.2 +/-    1.32  0.040 / 0.040
G07     97.8           58.6               13.2 +/-    1.24      15.2 +/-    1.24  0.050 / 0.030
G08     43.1           26.7                9.1 +/-    2.16      17.0 +/-    2.16  0.050 / 0.060
G09     176.9          22.7               12.3 +/-    1.21      25.3 +/-    1.21  0.060 / 0.060
G11     98.9           41.9               13.2 +/-    0.80      18.6 +/-    0.80  0.090 / 0.210
G13     315.0          23.7                8.8 +/-    1.35      17.8 +/-    1.35  0.120 / 0.200
G17     202.0          29.9               12.7 +/-    1.07      22.4 +/-    1.07  0.030 / 0.030
G18     86.9           22.0               11.2 +/-    2.64      23.5 +/-    2.64  0.030 / 0.030
G28     294.0          56.5               12.4 +/-    1.41      14.5 +/-    1.41  0.100 / 0.190
G30     359.6          73.3               12.6 +/-    0.65      13.1 +/-    0.65  0.120 / 0.220