PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-22:28:10
G02     64.1           30.5               11.2 +/-    1.46      19.4 +/-    1.46  0.120 / 0.180
G05     51.9           58.0               10.2 +/-    0.43      11.8 +/-    0.43  0.070 / 0.220
G12     182.9          23.7               14.9 +/-    3.60      30.0 +/-    3.60  0.030 / 0.040
G13     123.6          20.3               13.4 +/-    1.42      29.3 +/-    1.42  0.030 / 0.030
G15     161.5          16.8               19.0 +/-    3.19      45.4 +/-    3.19  0.080 / 0.240
G20     211.7          70.1               15.9 +/-    0.66      16.8 +/-    0.66  0.080 / 0.250
G21     277.0          21.9               11.4 +/-    1.14      24.0 +/-    1.14  0.060 / 0.090
G25     220.2          44.1               14.1 +/-    1.13      19.2 +/-    1.13  0.050 / 0.080
G29     335.0          63.8               12.5 +/-    0.61      13.7 +/-    0.61  0.030 / 0.050