PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-18:42:40
G02     53.3           38.4               16.5 +/-    1.38      24.6 +/-    1.38  0.040 / 0.050
G05     81.5           70.4               18.6 +/-    0.37      19.7 +/-    0.37  0.060 / 0.060
G12     187.0          40.6               17.9 +/-    0.69      25.8 +/-    0.69  0.050 / 0.070
G13     135.4          10.1                1.0 +/-   36.14       2.7 +/-   36.14  0.040 / 0.060
G20     204.0          52.4               19.3 +/-    0.59      23.7 +/-    0.59  0.020 / 0.020
G21     265.6          13.8               19.0 +/-    1.23      48.5 +/-    1.23  0.020 / 0.020
G25     243.1          56.1               17.9 +/-    1.32      21.0 +/-    1.32  0.040 / 0.040
G29     326.2          51.3               16.2 +/-    0.75      20.1 +/-    0.75  0.040 / 0.050