PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-15:42:40
G01     73.6           32.9                9.8 +/-    1.10      16.2 +/-    1.10  0.120 / 0.260
G07     135.7          29.9               11.2 +/-    1.47      19.7 +/-    1.47  0.200 / 0.240
G11     54.4           29.6                9.3 +/-    1.81      16.4 +/-    1.81  0.060 / 0.110
G13     280.1          37.0               10.9 +/-    2.58      16.7 +/-    2.58  0.060 / 0.090
G15     308.1          13.0                8.3 +/-    1.99      21.7 +/-    1.99  0.030 / 0.020
G17     230.0          69.4               12.4 +/-    0.87      13.2 +/-    0.87  0.030 / 0.030
G19     222.3          41.6               14.0 +/-    2.03      19.8 +/-    2.03  0.080 / 0.080
G28     14.9           59.7               11.8 +/-    0.66      13.4 +/-    0.66  0.090 / 0.070
G30     130.8          67.0               12.0 +/-    0.43      12.9 +/-    0.43  0.040 / 0.030