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               10.4 +/-    0.67      11.1 +/-    0.67  0.120 / 0.280
G05     173.9          11.6                8.1 +/-   21.80      21.9 +/-   21.80  0.120 / 0.270
G06     42.8           61.7               11.4 +/-    0.67      12.8 +/-    0.67  0.040 / 0.070
G12     322.3          50.5               10.0 +/-    1.19      12.5 +/-    1.19  0.030 / 0.050
G17     66.9           25.1               11.8 +/-    1.50      23.0 +/-    1.50  0.040 / 0.050
G19     48.8           44.5               11.0 +/-    0.43      14.9 +/-    0.43  0.040 / 0.040
G24     249.4          37.5               12.7 +/-    1.23      19.2 +/-    1.23  0.060 / 0.090