PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/14-04:12:30
G10     253.0          29.8               10.6 +/-    1.85      18.7 +/-    1.85  0.040 / 0.040
G13     50.8           27.5                6.8 +/-    1.82      12.6 +/-    1.82  0.030 / 0.040
G15     78.9           56.0                9.7 +/-    1.19      11.4 +/-    1.19  0.080 / 0.120
G16     296.0          14.5                7.2 +/-    1.64      18.1 +/-    1.64  0.090 / 0.100
G20     274.0          52.6                9.9 +/-    3.02      12.1 +/-    3.02  0.080 / 0.290
G21     339.3          62.6                9.7 +/-    0.57      10.8 +/-    0.57  0.120 / 0.310
G26     267.6          14.3                9.3 +/-    2.26      23.6 +/-    2.26  0.080 / 0.220
G29     162.8          43.8               10.4 +/-    0.62      14.3 +/-    0.62  0.120 / 0.170