PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/02-19:12:40
G01     83.5           32.5               12.1 +/-    0.78      20.1 +/-    0.78  0.060 / 0.100
G11     61.8           37.1               11.0 +/-    1.09      16.8 +/-    1.09  0.060 / 0.090
G13     287.8          38.1               11.3 +/-    0.87      16.9 +/-    0.87  0.040 / 0.060
G15     311.0          12.5               10.2 +/-    2.04      26.9 +/-    2.04  0.040 / 0.050
G17     217.7          58.9               13.6 +/-    0.81      15.6 +/-    0.81  0.080 / 0.230
G18     56.8           21.6                9.5 +/-    1.07      20.0 +/-    1.07  0.100 / 0.250
G19     216.4          32.2               12.3 +/-    2.16      20.7 +/-    2.16  0.070 / 0.140
G28     348.9          61.6               10.3 +/-    0.66      11.5 +/-    0.66  0.070 / 0.130
G30     120.2          70.0               11.3 +/-    0.58      12.0 +/-    0.58  0.030 / 0.040