PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-11:58:10
G01     84.8           32.6                2.2 +/-    1.25       3.6 +/-    1.25  0.090 / 0.090
G11     62.8           35.8                4.5 +/-    1.03       7.0 +/-    1.03  0.070 / 0.090
G13     291.8          35.8                6.6 +/-    1.06      10.3 +/-    1.06  0.100 / 0.080
G15     313.5          11.0               -4.3 +/-   12.36     -11.7 +/-   12.36  0.080 / 0.090
G17     218.0          60.6                6.4 +/-    1.05       7.2 +/-    1.05  0.170 / 0.240
G19     216.7          32.9                8.0 +/-    1.52      13.2 +/-    1.52  0.210 / 0.200
G28     358.5          61.2                4.3 +/-    0.92       4.9 +/-    0.92  0.030 / 0.020
G30     113.5          74.1                5.2 +/-    0.73       5.4 +/-    0.73  0.030 / 0.020