PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-10:13:00
G10     243.3          19.7                3.7 +/-    1.26       8.3 +/-    1.26  0.030 / 0.050
G13     63.6           34.7                5.4 +/-    0.52       8.6 +/-    0.52  0.030 / 0.040
G15     102.4          56.6                7.6 +/-    0.46       9.0 +/-    0.46  0.040 / 0.060
G16     305.8          14.3                2.7 +/-    2.01       6.9 +/-    2.01  0.040 / 0.050
G20     29.3           62.3                6.6 +/-    0.30       7.3 +/-    0.30  0.080 / 0.390
G21     325.5          55.5                4.2 +/-    0.94       4.9 +/-    0.94  0.110 / 0.370
G26     276.7          18.6                3.6 +/-    1.00       8.2 +/-    1.00  0.070 / 0.130
G29     161.0          58.8                8.3 +/-    0.71       9.6 +/-    0.71  0.070 / 0.110