PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-23:12:30
G02     221.0          66.0               12.4 +/-    0.65      13.5 +/-    0.65  0.060 / 0.090
G06     49.9           72.8               10.0 +/-    0.49      10.4 +/-    0.49  0.070 / 0.100
G12     318.9          37.9                7.4 +/-    0.75      11.2 +/-    0.75  0.040 / 0.080
G17     61.4           28.7                8.3 +/-    0.78      15.0 +/-    0.78  0.040 / 0.070
G19     44.9           45.6                9.3 +/-    0.70      12.5 +/-    0.70  0.120 / 0.350
G24     257.4          40.1               11.9 +/-    0.78      17.3 +/-    0.78  0.120 / 0.440
G28     124.6          13.9               12.7 +/-    1.61      32.5 +/-    1.61  0.040 / 0.050