PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-18:57:50
G07     111.0          51.7               14.7 +/-    0.64      18.2 +/-    0.64  0.030 / 0.030
G08     41.7           19.6                9.5 +/-    2.04      21.0 +/-    2.04  0.050 / 0.030
G09     175.5          14.7               14.4 +/-    1.18      36.2 +/-    1.18  0.100 / 0.190
G11     86.8           43.0               13.7 +/-    1.12      19.0 +/-    1.12  0.080 / 0.160
G13     309.0          29.6               14.2 +/-    1.00      25.0 +/-    1.00  0.070 / 0.170
G17     205.1          38.5               17.6 +/-    0.94      26.3 +/-    0.94  0.110 / 0.140
G18     77.8           23.8               11.4 +/-    1.46      22.9 +/-    1.46  0.170 / 0.440
G19     208.5          13.6               14.2 +/-    3.09      36.5 +/-    3.09  0.130 / 0.360
G28     309.4          59.2               14.1 +/-    1.06      16.1 +/-    1.06  0.170 / 0.260
G30     34.3           78.6               14.8 +/-    1.12      15.1 +/-    1.12  0.170 / 0.240