PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-00:12:50
G02     86.3           13.4               11.8 +/-    1.36      30.4 +/-    1.36  0.140 / 0.350
G05     45.2           30.7               10.0 +/-    0.55      17.3 +/-    0.55  0.190 / 0.340
G13     94.2           35.6               13.4 +/-    0.89      21.1 +/-    0.89  0.020 / 0.030
G15     143.7          41.1               18.2 +/-    0.85      26.0 +/-    0.85  0.020 / 0.030
G18     234.5          30.1               17.2 +/-    1.00      30.1 +/-    1.00  0.050 / 0.110
G20     15.4           77.9               12.0 +/-    0.63      12.3 +/-    0.63  0.050 / 0.110
G21     300.7          38.7               12.0 +/-    0.43      17.9 +/-    0.43  0.110 / 0.200
G25     202.4          18.9               17.7 +/-    2.65      40.1 +/-    2.65  0.120 / 0.220
G26     301.9          19.1               11.0 +/-    1.74      24.7 +/-    1.74  0.050 / 0.090
G29     125.9          84.8               12.3 +/-    0.68      12.3 +/-    0.68  0.040 / 0.100