PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/26-10:28:00
G10     253.3          28.4                5.4 +/-    1.81       9.7 +/-    1.81  0.050 / 0.050
G13     51.3           28.7                1.7 +/-    1.12       3.1 +/-    1.12  0.060 / 0.050
G15     77.9           55.6                4.0 +/-    0.68       4.8 +/-    0.68  0.050 / 0.050
G16     293.7          14.7                2.9 +/-    1.69       7.2 +/-    1.69  0.050 / 0.050
G20     40.1           51.8                2.2 +/-    0.67       2.8 +/-    0.67  0.130 / 0.260
G21     340.8          63.7                3.2 +/-    0.51       3.5 +/-    0.51  0.090 / 0.250
G26     264.8          14.3                4.3 +/-    0.79      10.8 +/-    0.79  0.070 / 0.150
G29     165.0          45.1                6.1 +/-    0.79       8.3 +/-    0.79  0.050 / 0.140