PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-22:27:40
G02     51.3           41.0               11.7 +/-    1.33      16.8 +/-    1.33  0.040 / 0.060
G05     78.0           69.1               11.3 +/-    0.27      12.0 +/-    0.27  0.040 / 0.060
G12     185.5          39.1               13.0 +/-    1.60      19.2 +/-    1.60  0.030 / 0.040
G13     135.1          10.2               -5.2 +/-   24.72     -14.4 +/-   24.72  0.030 / 0.030
G20     203.2          53.5               13.9 +/-    1.11      16.9 +/-    1.11  0.220 / 0.480
G21     265.1          12.6               11.7 +/-    2.01      30.8 +/-    2.01  0.200 / 0.550
G25     240.4          56.0               12.0 +/-    0.73      14.1 +/-    0.73  0.050 / 0.090
G29     324.4          49.2               11.5 +/-    0.80      14.7 +/-    0.80  0.050 / 0.080