PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-19:12:40
G02     65.5           28.2               14.1 +/-    1.22      25.6 +/-    1.22  0.080 / 0.190
G05     52.2           59.0               15.0 +/-    0.44      17.2 +/-    0.44  0.090 / 0.220
G12     183.8          24.7               18.6 +/-    1.15      36.7 +/-    1.15  0.080 / 0.170
G13     123.8          20.3               20.0 +/-    2.08      43.6 +/-    2.08  0.090 / 0.180
G15     159.8          17.9               21.7 +/-    2.91      50.4 +/-    2.91  0.050 / 0.090
G20     212.8          69.2               18.1 +/-    0.57      19.2 +/-    0.57  0.050 / 0.080
G21     277.8          23.1               12.7 +/-    1.02      26.0 +/-    1.02  0.030 / 0.060
G25     222.5          44.7               17.8 +/-    1.27      24.1 +/-    1.27  0.040 / 0.050
G29     337.9          65.9               16.2 +/-    1.01      17.6 +/-    1.01  0.030 / 0.040