PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-07:27:40
G03     247.8          68.0                4.8 +/-    0.46       5.2 +/-    0.46  0.040 / 0.060
G09     304.3          20.9                6.1 +/-    3.06      13.2 +/-    3.06  0.040 / 0.070
G14     100.0          13.2                4.5 +/-    1.64      11.6 +/-    1.64  0.050 / 0.040
G16     131.7          58.5                7.0 +/-    0.58       8.1 +/-    0.58  0.050 / 0.070
G22     195.0          56.4                5.1 +/-    1.60       6.0 +/-    1.60  0.160 / 0.470
G23     317.6          47.1                4.0 +/-    1.44       5.2 +/-    1.44  0.150 / 0.410
G26     73.0           53.6                5.7 +/-    0.36       6.9 +/-    0.36  0.030 / 0.040
G31     51.4           21.1                1.6 +/-    0.43       3.5 +/-    0.43  0.030 / 0.050