PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-20:58:10
G02     61.0           31.7                7.1 +/-    2.16      11.9 +/-    2.16  0.250 / 0.210
G05     54.3           58.5               10.9 +/-    0.90      12.5 +/-    0.90  0.090 / 0.220
G12     184.5          31.0               11.6 +/-    1.01      20.0 +/-    1.01  0.130 / 0.360
G13     124.5          16.8               12.7 +/-    2.11      30.2 +/-    2.11  0.100 / 0.290
G15     161.9          14.9               13.6 +/-    1.84      34.0 +/-    1.84  0.050 / 0.080
G21     273.7          18.3               11.9 +/-    2.50      27.4 +/-    2.50  0.070 / 0.100
G25     233.8          50.2               11.5 +/-    2.77      14.4 +/-    2.77  0.100 / 0.210
G29     331.4          57.8               11.0 +/-    1.01      12.7 +/-    1.01  0.180 / 0.220