PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-11:58:10
G01     125.6          12.7                1.9 +/-    2.11       5.0 +/-    2.11  0.100 / 0.500
G07     64.0           67.5                2.2 +/-    0.96       2.4 +/-    0.96  0.100 / 0.510
G08     48.6           36.5                1.1 +/-    0.78       1.7 +/-    0.78  0.030 / 0.050
G09     175.7          31.9                4.3 +/-    1.12       7.2 +/-    1.12  0.040 / 0.040
G11     113.8          35.0                3.5 +/-    0.62       5.5 +/-    0.62  0.030 / 0.040
G13     321.5          11.0               -6.8 +/-   12.27     -18.7 +/-   12.27  0.030 / 0.040
G17     199.4          18.7                3.3 +/-    1.46       7.6 +/-    1.46  0.090 / 0.340
G28     279.3          53.8                3.2 +/-    0.91       3.9 +/-    0.91  0.100 / 0.330
G30     332.5          60.0                2.0 +/-    1.21       2.3 +/-    1.21  0.080 / 0.250