PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-08:58:10
G01     123.0          14.9                5.2 +/-    1.81      13.0 +/-    1.81  0.030 / 0.020
G07     69.9           67.9                6.8 +/-    0.37       7.3 +/-    0.37  0.020 / 0.020
G08     46.3           33.6                4.7 +/-    1.11       7.7 +/-    1.11  0.140 / 0.260
G09     173.9          26.1                6.4 +/-    1.81      12.2 +/-    1.81  0.160 / 0.300
G11     110.9          38.1                7.3 +/-    1.27      11.0 +/-    1.27  0.030 / 0.030
G13     319.4          16.1                2.1 +/-    2.07       5.2 +/-    2.07  0.030 / 0.030
G17     200.0          21.4                4.2 +/-    1.63       9.0 +/-    1.63  0.150 / 0.290
G18     97.4           18.9                5.2 +/-    1.55      11.7 +/-    1.55  0.120 / 0.350
G28     283.2          54.7                3.8 +/-    2.78       4.5 +/-    2.78  0.100 / 0.200
G30     336.7          63.6                5.0 +/-    0.49       5.5 +/-    0.49  0.100 / 0.200