PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/17-17:57:50
G10     265.4          38.8                8.5 +/-    1.32      12.6 +/-    1.32  0.130 / 0.220
G13     42.4           18.5                9.5 +/-    2.36      21.8 +/-    2.36  0.130 / 0.230
G15     60.1           49.0                7.9 +/-    0.83      10.1 +/-    0.83  0.050 / 0.060
G20     297.3          60.6                8.3 +/-    0.83       9.3 +/-    0.83  0.050 / 0.050
G21     357.9          70.1                8.2 +/-    0.73       8.7 +/-    0.73  0.210 / 0.300
G24     123.9          12.9               12.4 +/-    2.84      32.5 +/-    2.84  0.160 / 0.300
G27     319.7          17.2                7.6 +/-    1.77      17.9 +/-    1.77  0.050 / 0.080
G29     167.1          34.3               10.2 +/-    0.81      16.3 +/-    0.81  0.050 / 0.100