PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-13:57:40
G01     101.7          27.8                8.1 +/-    2.16      14.8 +/-    2.16  0.030 / 0.020
G07     114.9          51.1                8.8 +/-    0.39      11.0 +/-    0.39  0.030 / 0.020
G08     41.6           14.4                5.6 +/-    1.75      14.1 +/-    1.75  0.030 / 0.040
G11     79.7           40.3                9.5 +/-    1.57      13.8 +/-    1.57  0.030 / 0.040
G13     307.1          29.9                8.1 +/-    1.59      14.2 +/-    1.59  0.080 / 0.130
G17     207.4          45.4                9.8 +/-    1.58      13.1 +/-    1.58  0.100 / 0.120
G19     210.2          19.1               10.1 +/-    2.61      22.7 +/-    2.61  0.060 / 0.100
G28     328.1          61.4                7.2 +/-    0.94       8.1 +/-    0.94  0.070 / 0.100
G30     35.5           79.5                7.6 +/-    0.78       7.7 +/-    0.78  0.050 / 0.040