PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/07-07:58:00
G07     357.0          64.6                3.0 +/-    0.85       3.2 +/-    0.85  0.040 / 0.050
G08     76.1           50.9                6.1 +/-    0.93       7.6 +/-    0.93  0.030 / 0.040
G09     180.2          59.6                8.7 +/-    1.30       9.9 +/-    1.30  0.070 / 0.100
G11     136.4          20.4                5.9 +/-    1.09      12.8 +/-    1.09  0.070 / 0.100
G23     159.2          31.2                6.6 +/-    0.97      11.2 +/-    0.97  0.040 / 0.040
G27     45.2           23.5                2.0 +/-    0.94       4.0 +/-    0.94  0.040 / 0.040
G28     248.3          39.0                8.2 +/-    1.04      12.1 +/-    1.04  0.030 / 0.050
G30     311.0          42.4                3.0 +/-    1.76       4.2 +/-    1.76  0.040 / 0.050