PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-08:57:50
G07     336.4          59.0                2.9 +/-    0.54       3.3 +/-    0.54  0.040 / 0.050
G08     96.1           51.2                7.4 +/-    0.30       9.2 +/-    0.30  0.040 / 0.060
G09     184.9          72.1                6.7 +/-    1.00       7.0 +/-    1.00  0.040 / 0.040
G11     144.1          12.9                5.4 +/-    1.79      14.1 +/-    1.79  0.030 / 0.040
G16     46.5           10.2                2.9 +/-    3.18       8.1 +/-    3.18  0.110 / 0.100
G23     156.0          43.7                6.7 +/-    0.60       9.2 +/-    0.60  0.090 / 0.090
G27     54.3           30.8                5.4 +/-    2.56       9.3 +/-    2.56  0.090 / 0.100
G28     237.5          29.9                6.7 +/-    0.93      11.8 +/-    0.93  0.100 / 0.100
G30     301.0          33.8                2.0 +/-    0.53       3.2 +/-    0.53  0.030 / 0.030