PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-11:57:30
G10     242.9          19.1                5.0 +/-    1.55      11.2 +/-    1.55  0.110 / 0.400
G13     64.5           35.1                5.9 +/-    1.05       9.4 +/-    1.05  0.090 / 0.520
G15     103.4          56.5                7.7 +/-    0.43       9.0 +/-    0.43  0.030 / 0.040
G16     307.2          13.8                2.5 +/-    2.65       6.3 +/-    2.65  0.030 / 0.040
G20     30.4           61.7                4.9 +/-    0.42       5.5 +/-    0.42  0.040 / 0.060
G21     326.1          55.9                3.4 +/-    0.63       4.1 +/-    0.63  0.040 / 0.040
G26     278.1          18.6                3.2 +/-    0.71       7.3 +/-    0.71  0.030 / 0.030
G29     160.1          58.6                8.3 +/-    0.50       9.6 +/-    0.50  0.030 / 0.030