PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-22:42:30
G02     55.4           37.7               10.4 +/-    1.23      15.8 +/-    1.23  0.040 / 0.060
G05     66.0           66.1               10.8 +/-    0.37      11.7 +/-    0.37  0.050 / 0.070
G12     184.6          33.9               12.9 +/-    0.82      21.0 +/-    0.82  0.140 / 0.380
G13     131.5          13.4               11.2 +/-    1.82      29.0 +/-    1.82  0.220 / 0.440
G20     205.2          58.9               12.1 +/-    0.58      13.9 +/-    0.58  0.030 / 0.060
G21     268.8          15.6               12.5 +/-    1.16      30.8 +/-    1.16  0.060 / 0.060
G25     232.8          52.7               11.7 +/-    1.06      14.3 +/-    1.06  0.050 / 0.080
G29     327.6          53.7               10.0 +/-    0.79      12.1 +/-    0.79  0.050 / 0.100