PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-18:43:00
G02     51.7           39.7               22.3 +/-    1.08      32.5 +/-    1.08  0.040 / 0.070
G05     87.6           71.0               26.1 +/-    0.45      27.4 +/-    0.45  0.040 / 0.060
G12     187.4          42.6               27.0 +/-    0.67      37.7 +/-    0.67  0.060 / 0.050
G20     203.3          50.4               27.4 +/-    0.80      34.3 +/-    0.80  0.050 / 0.040
G21     264.2          12.7               19.8 +/-   24.16      52.0 +/-   24.16  0.050 / 0.060
G25     246.4          57.1               26.4 +/-    1.16      30.8 +/-    1.16  0.050 / 0.060
G29     324.9          49.6               23.1 +/-    0.90      29.3 +/-    0.90  0.020 / 0.020