PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-18:12:40
G02     229.3          69.0               11.4 +/-    0.54      12.1 +/-    0.54  0.270 / 0.420
G05     173.9          11.6                3.0 +/-   23.36       8.2 +/-   23.36  0.210 / 0.410
G06     42.8           61.7               11.7 +/-    0.70      13.1 +/-    0.70  0.140 / 0.150
G12     322.3          50.5               10.9 +/-    0.89      13.7 +/-    0.89  0.150 / 0.140
G17     66.9           25.1               12.7 +/-    2.30      24.7 +/-    2.30  0.030 / 0.050
G19     48.8           44.5               12.5 +/-    1.18      17.0 +/-    1.18  0.030 / 0.040
G24     249.4          37.5               12.1 +/-    1.59      18.3 +/-    1.59  0.050 / 0.040