PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/06-12:27:30
G01     84.5           32.6                4.1 +/-    1.66       6.8 +/-    1.66  0.060 / 0.110
G07     129.5          39.0                6.9 +/-    0.91      10.3 +/-    0.91  0.060 / 0.100
G11     62.5           35.6                5.8 +/-    1.42       9.1 +/-    1.42  0.040 / 0.080
G13     291.6          35.8                7.9 +/-    1.06      12.4 +/-    1.06  0.050 / 0.060
G15     313.6          10.9               -3.5 +/-   13.24      -9.5 +/-   13.24  0.030 / 0.020
G17     218.2          60.8                6.3 +/-    0.99       7.1 +/-    0.99  0.030 / 0.020
G19     216.7          33.1                8.4 +/-    1.97      13.8 +/-    1.97  0.040 / 0.050
G28     358.7          61.2                4.9 +/-    0.92       5.5 +/-    0.92  0.050 / 0.040
G30     113.7          74.1                6.5 +/-    0.72       6.8 +/-    0.72  0.250 / 0.210