PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/02-20:43:00
G01     42.5           18.4                9.8 +/-    0.81      22.4 +/-    0.81  0.040 / 0.060
G06     177.0          33.4               16.3 +/-    1.45      26.7 +/-    1.45  0.030 / 0.070
G13     239.6          24.7               13.8 +/-    1.68      27.1 +/-    1.68  0.150 / 0.250
G15     273.1          13.4               12.5 +/-    1.88      32.2 +/-    1.88  0.110 / 0.210
G17     355.0          73.0               13.1 +/-    0.80      13.6 +/-    0.80  0.040 / 0.040
G19     267.6          67.7               13.0 +/-    0.56      13.9 +/-    0.56  0.040 / 0.080
G24     317.1          17.1               11.0 +/-    1.84      26.0 +/-    1.84  0.030 / 0.040
G28     61.8           51.8               12.3 +/-    0.49      15.2 +/-    0.49  0.030 / 0.040
G30     153.0          29.1               15.6 +/-    0.98      27.8 +/-    0.98  0.070 / 0.160