PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-09:27:40
G01     127.0          11.6                6.0 +/-    4.30      16.1 +/-    4.30  0.050 / 0.050
G07     57.1           68.4                3.9 +/-    0.52       4.2 +/-    0.52  0.040 / 0.050
G08     49.8           38.1                2.8 +/-    0.61       4.2 +/-    0.61  0.030 / 0.040
G09     176.8          34.9                8.2 +/-    1.23      13.1 +/-    1.23  0.040 / 0.030
G11     116.6          34.2                7.3 +/-    1.60      11.8 +/-    1.60  0.080 / 0.100
G17     199.2          16.9                5.9 +/-    2.23      13.9 +/-    2.23  0.080 / 0.080
G28     276.7          53.1                6.9 +/-    1.84       8.4 +/-    1.84  0.130 / 0.360
G30     331.6          59.3                2.8 +/-    1.47       3.2 +/-    1.47  0.100 / 0.340