PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-20:57:50
G02     65.9           28.5                9.5 +/-    1.06      17.1 +/-    1.06  0.050 / 0.170
G05     51.2           58.2               10.7 +/-    0.72      12.3 +/-    0.72  0.050 / 0.200
G12     183.1          22.9               13.7 +/-    3.20      28.1 +/-    3.20  0.050 / 0.090
G13     122.7          21.2               13.8 +/-    1.09      29.6 +/-    1.09  0.040 / 0.100
G15     159.9          18.4               15.1 +/-    2.51      34.5 +/-    2.51  0.090 / 0.200
G20     213.4          71.2               12.9 +/-    0.88      13.6 +/-    0.88  0.080 / 0.220
G21     278.4          23.1               12.3 +/-    1.12      25.0 +/-    1.12  0.030 / 0.040
G25     219.9          43.2               12.5 +/-    1.15      17.2 +/-    1.15  0.030 / 0.040