PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-13:57:50
G01     119.3          17.5                8.6 +/-    2.52      20.2 +/-    2.52  0.030 / 0.040
G07     84.1           63.8                8.9 +/-    0.46       9.8 +/-    0.46  0.030 / 0.040
G08     44.8           30.2                7.2 +/-    1.26      12.5 +/-    1.26  0.030 / 0.040
G09     175.7          25.2                9.4 +/-    0.95      18.3 +/-    0.95  0.030 / 0.050
G11     104.3          38.1                9.0 +/-    1.70      13.5 +/-    1.70  0.050 / 0.180
G13     318.9          17.2                6.1 +/-    2.26      14.4 +/-    2.26  0.050 / 0.140
G17     200.8          26.3                8.6 +/-    3.54      16.3 +/-    3.54  0.110 / 0.230
G28     291.9          57.0                8.0 +/-    0.85       9.4 +/-    0.85  0.110 / 0.260
G30     341.5          66.0                9.0 +/-    1.19       9.7 +/-    1.19  0.180 / 0.340