PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-15:58:00
G02     215.8          58.3               14.5 +/-    1.01      16.7 +/-    1.01  0.040 / 0.040
G06     59.5           75.3               12.7 +/-    0.57      13.1 +/-    0.57  0.050 / 0.040
G12     318.7          36.0               11.7 +/-    1.42      18.3 +/-    1.42  0.040 / 0.070
G17     59.3           30.1               12.3 +/-    1.87      21.5 +/-    1.87  0.080 / 0.060
G19     41.9           47.6               12.0 +/-    0.80      15.6 +/-    0.80  0.070 / 0.090
G24     267.9          41.4               13.8 +/-    1.16      19.6 +/-    1.16  0.060 / 0.080
G28     123.1          13.1               14.7 +/-    1.50      38.3 +/-    1.50  0.070 / 0.060