PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-05:12:50
G08     266.5          18.6                8.3 +/-    2.20      18.8 +/-    2.20  0.030 / 0.020
G10     57.7           59.6                4.3 +/-    1.23       4.9 +/-    1.23  0.030 / 0.020
G11     310.4          18.9                5.6 +/-    1.60      12.7 +/-    1.60  0.160 / 0.260
G14     267.7          67.2                6.3 +/-    1.04       6.7 +/-    1.04  0.120 / 0.360
G18     89.7           38.7                5.6 +/-    1.20       8.3 +/-    1.20  0.110 / 0.140
G21     154.1          16.4                6.5 +/-    3.02      15.6 +/-    3.02  0.210 / 0.180
G24     40.6           12.1                5.1 +/-    1.45      13.6 +/-    1.45  0.030 / 0.010
G27     231.1          16.1                8.6 +/-    2.14      20.9 +/-    2.14  0.030 / 0.010
G31     178.3          29.6                7.9 +/-    0.94      14.0 +/-    0.94  0.210 / 0.090
G32     332.9          74.5                2.7 +/-    0.48       2.8 +/-    0.48  0.170 / 0.080