PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-12:12:30
G10     251.1          26.6                6.0 +/-    1.80      11.4 +/-    1.80  0.080 / 0.190
G13     53.6           30.3                4.7 +/-    1.72       8.1 +/-    1.72  0.070 / 0.230
G15     82.4           56.3                6.1 +/-    0.84       7.2 +/-    0.84  0.040 / 0.040
G16     297.2          14.5               -1.8 +/-    1.12      -4.6 +/-    1.12  0.040 / 0.040
G20     39.3           52.6                4.3 +/-    0.97       5.3 +/-    0.97  0.050 / 0.040
G21     339.2          62.8                3.8 +/-    0.94       4.2 +/-    0.94  0.060 / 0.040
G26     267.9          15.3                4.7 +/-    2.33      11.6 +/-    2.33  0.030 / 0.040
G29     163.9          46.9                6.7 +/-    0.48       8.8 +/-    0.48  0.040 / 0.040