PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-15:43:00
G01     66.9           32.1               21.9 +/-   43.15      36.7 +/-   43.15  0.110 / 0.270
G07     138.9          24.8               21.0 +/-   40.32      41.2 +/-   40.32  0.070 / 0.250
G11     50.7           25.7               17.7 +/-   39.81      34.0 +/-   39.81  0.070 / 0.130
G13     272.8          36.5               25.8 +/-   44.48      39.9 +/-   44.48  0.060 / 0.200
G15     303.1          14.4               14.4 +/-   44.62      36.4 +/-   44.62  0.030 / 0.100
G17     242.6          74.4                7.8 +/-    2.55       8.1 +/-    2.55  0.030 / 0.150
G19     226.9          47.0               27.7 +/-   39.85      36.4 +/-   39.85  0.090 / 0.230
G28     25.0           58.4               10.7 +/-    2.32      12.3 +/-    2.32  0.060 / 0.200
G30     137.7          61.3               28.2 +/-   42.00      31.7 +/-   42.00  0.050 / 0.120