PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/05-16:43:10
G07     17.3           67.0                9.0 +/-    0.49       9.7 +/-    0.49  0.060 / 0.120
G08     72.6           50.8                9.2 +/-    0.39      11.5 +/-    0.39  0.080 / 0.120
G09     182.6          58.4               11.5 +/-    0.65      13.2 +/-    0.65  0.080 / 0.280
G11     134.4          24.0               12.9 +/-    1.01      25.7 +/-    1.01  0.080 / 0.280
G23     159.0          25.7               11.4 +/-    2.55      21.9 +/-    2.55  0.040 / 0.040
G27     44.5           23.4                7.1 +/-    0.75      14.5 +/-    0.75  0.030 / 0.040
G28     248.6          36.6               10.3 +/-    1.14      15.9 +/-    1.14  0.070 / 0.130
G30     316.0          47.6                9.3 +/-    0.60      12.1 +/-    0.60  0.070 / 0.130