PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-15:28:10
G01     72.3           32.8                8.1 +/-    1.26      13.4 +/-    1.26  0.160 / 0.200
G07     136.3          29.0                8.5 +/-    1.26      15.2 +/-    1.26  0.140 / 0.230
G11     53.6           28.9                8.2 +/-    1.99      14.6 +/-    1.99  0.080 / 0.090
G13     278.7          37.0                8.0 +/-    2.35      12.2 +/-    2.35  0.090 / 0.090
G15     307.0          13.4                7.4 +/-    0.86      19.1 +/-    0.86  0.070 / 0.090
G17     232.0          70.5               10.5 +/-    0.94      11.0 +/-    0.94  0.070 / 0.120
G19     223.2          42.7               11.0 +/-    1.93      15.3 +/-    1.93  0.040 / 0.030
G28     16.9           59.5               10.5 +/-    0.87      12.0 +/-    0.87  0.040 / 0.020
G30     132.4          65.8               10.1 +/-    0.37      10.9 +/-    0.37  0.040 / 0.030