PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-15:27:50
G01     75.1           33.0               10.0 +/-    0.99      16.4 +/-    0.99  0.040 / 0.040
G07     134.9          31.1               13.1 +/-    1.88      22.4 +/-    1.88  0.030 / 0.040
G11     55.3           30.4                8.6 +/-    0.75      14.9 +/-    0.75  0.060 / 0.110
G13     281.7          37.0               13.1 +/-    1.49      20.0 +/-    1.49  0.060 / 0.090
G15     309.0          12.7                8.9 +/-    1.86      23.3 +/-    1.86  0.040 / 0.050
G17     227.8          68.3               11.7 +/-    0.97      12.4 +/-    0.97  0.040 / 0.050
G19     221.4          40.4               14.2 +/-    2.02      20.5 +/-    2.02  0.090 / 0.110
G28     12.6           60.0               10.8 +/-    1.25      12.2 +/-    1.25  0.090 / 0.110
G30     128.9          68.1                9.4 +/-    0.49      10.0 +/-    0.49  0.080 / 0.100