PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-16:12:30
G07     357.1          64.4                7.2 +/-    0.58       7.9 +/-    0.58  0.070 / 0.170
G08     87.3           52.4                9.7 +/-    0.48      11.9 +/-    0.48  0.070 / 0.180
G09     187.2          67.9                8.1 +/-    0.84       8.7 +/-    0.84  0.110 / 0.340
G11     140.5          18.3               11.2 +/-    1.39      25.7 +/-    1.39  0.130 / 0.440
G23     157.2          34.3               11.0 +/-    2.50      17.7 +/-    2.50  0.040 / 0.040
G27     50.5           29.1                7.6 +/-    0.96      13.5 +/-    0.96  0.030 / 0.040
G28     240.9          30.1                8.2 +/-    1.69      14.2 +/-    1.69  0.080 / 0.100
G30     308.7          41.6                6.3 +/-    0.84       8.9 +/-    0.84  0.070 / 0.110