PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-14:13:10
G01     80.0           33.0                6.3 +/-    0.59      10.4 +/-    0.59  0.060 / 0.110
G07     132.3          35.1                6.3 +/-    0.66      10.0 +/-    0.66  0.060 / 0.110
G11     58.8           33.1                5.3 +/-    1.16       8.7 +/-    1.16  0.030 / 0.030
G13     286.9          36.6                6.7 +/-    1.87      10.3 +/-    1.87  0.040 / 0.040
G15     311.5          11.8                4.6 +/-    0.98      12.4 +/-    0.98  0.050 / 0.090
G17     222.2          64.5                9.8 +/-    0.80      10.8 +/-    0.80  0.060 / 0.100
G19     218.8          36.6                8.7 +/-    0.95      13.4 +/-    0.95  0.040 / 0.050
G28     5.4            60.7                6.3 +/-    0.78       7.1 +/-    0.78  0.050 / 0.050
G30     121.9          71.5                7.2 +/-    0.59       7.6 +/-    0.59  0.060 / 0.100