PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-10:27:50
G01     121.6          15.9                5.0 +/-    2.40      12.1 +/-    2.40  0.130 / 0.330
G07     76.1           66.1                4.4 +/-    0.45       4.8 +/-    0.45  0.120 / 0.390
G08     45.9           32.5                3.0 +/-    0.67       5.0 +/-    0.67  0.030 / 0.020
G09     175.8          27.5                4.9 +/-    2.33       9.0 +/-    2.33  0.040 / 0.030
G11     108.6          37.4                6.5 +/-    0.78       9.8 +/-    0.78  0.030 / 0.020
G13     320.0          15.0                1.0 +/-    2.85       2.5 +/-    2.85  0.030 / 0.030
G17     200.3          23.7                5.0 +/-    2.87      10.1 +/-    2.87  0.170 / 0.240
G28     287.8          56.2                3.1 +/-    1.92       3.6 +/-    1.92  0.180 / 0.270
G30     339.5          64.7                4.4 +/-    0.76       4.8 +/-    0.76  0.060 / 0.060