PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-09:58:10
G01     115.5          20.4                5.7 +/-    1.95      12.4 +/-    1.95  0.120 / 0.300
G07     92.1           62.5                6.6 +/-    0.73       7.4 +/-    0.73  0.120 / 0.300
G08     43.3           26.4                3.7 +/-    2.23       6.9 +/-    2.23  0.030 / 0.020
G09     175.3          20.8                9.1 +/-    3.29      19.7 +/-    3.29  0.040 / 0.030
G11     99.7           40.0                7.3 +/-    1.17      10.6 +/-    1.17  0.030 / 0.030
G13     316.8          20.6                4.7 +/-    1.45      10.3 +/-    1.45  0.030 / 0.030
G17     202.1          30.9                8.4 +/-    1.85      14.4 +/-    1.85  0.100 / 0.080
G28     301.0          58.9                4.1 +/-    0.85       4.7 +/-    0.85  0.130 / 0.120
G30     352.0          70.8                5.1 +/-    0.35       5.3 +/-    0.35  0.130 / 0.100