PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-18:12:30
G02     28.3           59.6               16.8 +/-    0.67      19.2 +/-    0.67  0.030 / 0.040
G05     154.0          56.4               18.6 +/-    0.64      21.9 +/-    0.64  0.030 / 0.040
G06     52.0           19.1               12.9 +/-    0.91      29.0 +/-    0.91  0.070 / 0.160
G12     205.3          71.4               16.2 +/-    0.63      17.0 +/-    0.63  0.070 / 0.160
G19     98.2           10.3               14.6 +/-    2.61      40.6 +/-    2.61  0.070 / 0.210
G20     197.7          23.4               19.6 +/-    1.49      39.8 +/-    1.49  0.110 / 0.240
G25     298.5          54.3               16.0 +/-    0.93      19.2 +/-    0.93  0.030 / 0.060
G29     306.4          28.3               14.0 +/-    1.58      25.4 +/-    1.58  0.040 / 0.060