PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-08:28:00
G01     125.2          13.1                3.9 +/-    3.69      10.1 +/-    3.69  0.120 / 0.420
G07     63.2           68.1                4.3 +/-    0.94       4.6 +/-    0.94  0.120 / 0.410
G08     48.3           36.3                1.6 +/-    0.77       2.5 +/-    0.77  0.040 / 0.070
G09     177.0          32.8                7.9 +/-    0.87      13.1 +/-    0.87  0.050 / 0.060
G11     114.4          35.5                7.7 +/-    0.91      12.0 +/-    0.91  0.040 / 0.070
G13     321.2          11.7               -1.2 +/-   10.61      -3.3 +/-   10.61  0.040 / 0.070
G17     199.6          19.1                4.9 +/-    1.44      11.0 +/-    1.44  0.030 / 0.040
G28     280.7          54.4                5.2 +/-    0.73       6.3 +/-    0.73  0.030 / 0.040
G30     335.1          61.7                3.1 +/-    0.66       3.5 +/-    0.66  0.090 / 0.220