PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-03:12:50
G08     263.5          17.3                8.5 +/-    1.17      20.0 +/-    1.17  0.130 / 0.290
G10     63.7           58.3                6.4 +/-    0.80       7.4 +/-    0.80  0.140 / 0.250
G11     308.6          20.3                6.0 +/-    2.57      13.0 +/-    2.57  0.090 / 0.330
G14     275.5          68.8                6.2 +/-    0.51       6.6 +/-    0.51  0.070 / 0.300
G18     93.3           35.9                7.1 +/-    1.36      11.1 +/-    1.36  0.030 / 0.020
G21     154.4          12.9                6.4 +/-    2.79      16.8 +/-    2.79  0.030 / 0.020
G24     39.4           9.9                 5.5 +/-    4.71      15.4 +/-    4.71  0.040 / 0.040
G27     228.8          14.0                8.6 +/-    2.40      21.8 +/-    2.40  0.040 / 0.040
G31     178.5          31.9                7.8 +/-    1.25      13.2 +/-    1.25  0.130 / 0.210
G32     339.4          73.4                6.8 +/-    0.39       7.1 +/-    0.39  0.180 / 0.430