PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-19:28:00
G07     352.6          63.7               12.4 +/-    0.78      13.7 +/-    0.78  0.040 / 0.040
G08     86.3           51.8               12.2 +/-    1.28      15.1 +/-    1.28  0.030 / 0.040
G09     186.7          68.2               13.6 +/-    0.47      14.6 +/-    0.47  0.110 / 0.090
G11     140.6          17.9               14.5 +/-    1.74      33.5 +/-    1.74  0.120 / 0.080
G23     157.7          36.6               13.7 +/-    0.81      21.0 +/-    0.81  0.150 / 0.150
G27     51.5           30.0               11.1 +/-    1.05      19.5 +/-    1.05  0.070 / 0.130
G28     240.6          30.4               13.1 +/-    1.18      22.7 +/-    1.18  0.030 / 0.030
G30     307.0          39.7               11.0 +/-    0.82      16.0 +/-    0.82  0.030 / 0.030