PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-09:12:50
G01     223.5          14.5                3.0 +/-   17.11       7.7 +/-   17.11  0.050 / 0.100
G03     282.3          67.4                3.5 +/-    1.65       3.7 +/-    1.65  0.070 / 0.110
G09     296.7          11.4                2.1 +/-   23.98       5.7 +/-   23.98  0.030 / 0.040
G14     90.6           20.4                6.4 +/-   11.55      14.0 +/-   11.55  0.030 / 0.040
G16     144.7          48.5                7.4 +/-    0.48       9.6 +/-    0.48  0.040 / 0.090
G22     205.2          67.4               15.9 +/-   23.52      17.1 +/-   23.52  0.040 / 0.080
G23     309.2          38.7                3.8 +/-    1.04       5.7 +/-    1.04  0.150 / 0.340
G26     92.7           55.0              -15.3 +/-   60.85     -18.2 +/-   60.85  0.250 / 0.350
G31     46.4           29.2                2.1 +/-    4.85       3.8 +/-    4.85  0.030 / 0.050