PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-15:57:40
G02     215.8          58.3               15.0 +/-    0.72      17.3 +/-    0.72  0.030 / 0.100
G06     59.5           75.3               13.0 +/-    0.75      13.4 +/-    0.75  0.070 / 0.070
G12     318.7          36.0               11.9 +/-    2.11      18.5 +/-    2.11  0.050 / 0.080
G17     59.3           30.1               11.7 +/-    0.44      20.4 +/-    0.44  0.060 / 0.080
G19     41.9           47.6               11.9 +/-    0.63      15.5 +/-    0.63  0.020 / 0.030
G24     267.9          41.4               12.0 +/-    1.23      17.1 +/-    1.23  0.030 / 0.020
G28     123.1          13.1               13.7 +/-    1.52      35.8 +/-    1.52  0.050 / 0.110