PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-23:58:10
G10     280.9          46.4               10.9 +/-    0.88      14.4 +/-    0.88  0.100 / 0.140
G15     50.2           39.3                8.2 +/-    0.65      12.1 +/-    0.65  0.100 / 0.150
G20     321.0          63.9               10.2 +/-    0.79      11.2 +/-    0.79  0.050 / 0.040
G21     38.1           76.8               10.3 +/-    0.77      10.6 +/-    0.77  0.050 / 0.040
G24     111.5          20.5               10.9 +/-    2.40      23.6 +/-    2.40  0.060 / 0.080
G27     312.7          26.6                9.0 +/-    2.04      17.0 +/-    2.04  0.050 / 0.080
G29     167.7          19.4               11.0 +/-    2.47      24.5 +/-    2.47  0.160 / 0.350
G32     206.3          18.6               14.2 +/-    2.49      32.3 +/-    2.49  0.170 / 0.390