PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-18:58:10
G02     54.5           37.4               11.0 +/-    1.75      16.7 +/-    1.75  0.050 / 0.050
G05     76.9           69.7               11.6 +/-    0.56      12.3 +/-    0.56  0.060 / 0.070
G12     186.6          38.7               12.4 +/-    0.76      18.4 +/-    0.76  0.050 / 0.050
G13     134.3          11.2               13.7 +/-   11.86      37.2 +/-   11.86  0.050 / 0.070
G20     204.6          54.3               13.0 +/-    0.68      15.6 +/-    0.68  0.040 / 0.040
G21     266.9          14.8               11.7 +/-    1.67      29.2 +/-    1.67  0.040 / 0.050
G25     240.0          55.1               11.1 +/-    3.16      13.2 +/-    3.16  0.030 / 0.030
G29     327.3          52.7                9.2 +/-    1.36      11.3 +/-    1.36  0.020 / 0.020