PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-13:58:10
G01     74.7           33.0                6.1 +/-    1.12      10.1 +/-    1.12  0.080 / 0.130
G07     135.2          31.3                8.4 +/-    0.89      14.4 +/-    0.89  0.080 / 0.120
G11     55.2           30.5                5.4 +/-    0.63       9.4 +/-    0.63  0.030 / 0.030
G13     281.4          36.9                8.2 +/-    0.54      12.5 +/-    0.54  0.030 / 0.030
G15     307.8          13.4                3.9 +/-    1.64      10.1 +/-    1.64  0.040 / 0.090
G17     228.6          68.7                7.8 +/-    0.95       8.4 +/-    0.95  0.040 / 0.090
G19     221.8          40.8                9.4 +/-    0.85      13.6 +/-    0.85  0.030 / 0.050
G28     13.7           59.9                5.1 +/-    0.48       5.8 +/-    0.48  0.040 / 0.040
G30     129.8          67.3                6.2 +/-    0.53       6.7 +/-    0.53  0.060 / 0.090