PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-06:42:40
G07     329.6          56.6                3.4 +/-    0.98       4.0 +/-    0.98  0.070 / 0.200
G08     103.0          50.3                6.1 +/-    1.03       7.7 +/-    1.03  0.080 / 0.200
G09     194.7          77.1                4.6 +/-    0.59       4.7 +/-    0.59  0.040 / 0.040
G11     147.2          10.5               -1.1 +/-   20.70      -2.9 +/-   20.70  0.040 / 0.050
G16     45.0           14.6                2.3 +/-    1.34       5.8 +/-    1.34  0.030 / 0.050
G23     154.5          47.7                7.1 +/-    1.18       9.3 +/-    1.18  0.030 / 0.050
G27     58.0           32.7                3.0 +/-    0.65       5.0 +/-    0.65  0.180 / 0.370
G28     234.6          27.0                5.6 +/-    1.64      10.4 +/-    1.64  0.120 / 0.300
G30     298.5          32.0                2.2 +/-    1.39       3.8 +/-    1.39  0.040 / 0.080