PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-12:57:40
G01     101.1          28.1                4.2 +/-    2.12       7.6 +/-    2.12  0.020 / 0.020
G07     115.5          51.0                5.3 +/-    0.53       6.6 +/-    0.53  0.030 / 0.020
G08     41.6           13.9                4.1 +/-    3.42      10.5 +/-    3.42  0.030 / 0.040
G11     79.2           40.4                5.3 +/-    1.04       7.7 +/-    1.04  0.030 / 0.040
G13     306.7          30.1                5.6 +/-    1.09       9.8 +/-    1.09  0.040 / 0.050
G17     207.7          46.1                4.6 +/-    0.84       6.2 +/-    0.84  0.030 / 0.050
G19     210.4          19.6                5.7 +/-    2.06      12.8 +/-    2.06  0.070 / 0.130
G28     329.5          61.5                4.2 +/-    0.66       4.7 +/-    0.66  0.060 / 0.120
G30     40.6           79.7                4.9 +/-    0.38       5.0 +/-    0.38  0.090 / 0.120