PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-07:58:10
G01     238.0          27.5                6.1 +/-    1.80      11.4 +/-    1.80  0.070 / 0.140
G03     311.0          53.3                4.3 +/-    1.10       5.3 +/-    1.10  0.090 / 0.150
G14     74.0           31.7                2.5 +/-    0.64       4.3 +/-    0.64  0.040 / 0.040
G16     157.8          29.8                5.8 +/-    2.08      10.1 +/-    2.08  0.040 / 0.040
G22     271.1          75.8                4.1 +/-    1.10       4.2 +/-    1.10  0.050 / 0.130
G23     295.4          26.0                3.4 +/-    2.50       6.5 +/-    2.50  0.050 / 0.140
G26     124.3          47.3                5.4 +/-    0.67       7.1 +/-    0.67  0.070 / 0.150
G31     40.6           46.1                1.9 +/-    0.93       2.6 +/-    0.93  0.110 / 0.150
G32     87.4           15.9                2.1 +/-    2.40       5.0 +/-    2.40  0.080 / 0.190