PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-07:42:40
G03     255.1          68.7                3.5 +/-    0.54       3.8 +/-    0.54  0.110 / 0.160
G09     302.7          18.9                2.7 +/-    1.73       6.1 +/-    1.73  0.120 / 0.130
G14     98.1           14.7                4.0 +/-    2.19      10.1 +/-    2.19  0.070 / 0.060
G16     135.2          56.5                7.2 +/-    0.61       8.4 +/-    0.61  0.050 / 0.060
G22     196.6          58.9                6.4 +/-    0.63       7.4 +/-    0.63  0.040 / 0.040
G23     315.8          45.2                3.5 +/-    0.72       4.7 +/-    0.72  0.030 / 0.040
G26     76.9           54.4                6.3 +/-    0.29       7.6 +/-    0.29  0.120 / 0.310
G31     50.3           22.8                2.1 +/-    2.07       4.3 +/-    2.07  0.120 / 0.360