PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-11:42:20
G10     293.3          50.1                3.4 +/-    0.84       4.2 +/-    0.84  0.040 / 0.050
G15     46.3           29.1                1.8 +/-    0.93       3.3 +/-    0.93  0.040 / 0.040
G20     67.2           25.2                4.2 +/-    1.69       8.1 +/-    1.69  0.050 / 0.080
G21     91.9           74.0                5.7 +/-    1.10       5.9 +/-    1.10  0.060 / 0.070
G24     101.0          25.5                4.9 +/-    0.45       9.5 +/-    0.45  0.080 / 0.180
G27     302.2          33.7                4.3 +/-    1.13       7.0 +/-    1.13  0.070 / 0.180
G32     209.6          30.4                4.3 +/-    2.48       7.5 +/-    2.48  0.040 / 0.040