PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-18:12:40
G02     53.0           38.5               11.8 +/-    0.95      17.5 +/-    0.95  0.040 / 0.050
G05     82.4           70.3               13.4 +/-    0.32      14.1 +/-    0.32  0.040 / 0.040
G12     187.3          41.4               12.5 +/-    0.81      17.7 +/-    0.81  0.140 / 0.260
G20     203.8          51.5               14.1 +/-    0.61      17.4 +/-    0.61  0.130 / 0.360
G21     265.2          13.7               12.3 +/-    2.84      31.5 +/-    2.84  0.050 / 0.060
G25     244.8          56.5               12.6 +/-    1.22      14.8 +/-    1.22  0.060 / 0.070
G29     326.1          51.1               11.3 +/-    1.03      14.1 +/-    1.03  0.020 / 0.020