PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-12:28:00
G10     293.2          50.1                4.5 +/-    1.00       5.6 +/-    1.00  0.060 / 0.080
G15     46.3           29.0                2.2 +/-    0.89       4.0 +/-    0.89  0.070 / 0.080
G20     67.4           24.6                4.1 +/-    1.92       8.0 +/-    1.92  0.080 / 0.180
G21     92.8           73.6                2.0 +/-    1.27       2.0 +/-    1.27  0.080 / 0.180
G24     101.1          25.5                6.1 +/-    1.11      11.8 +/-    1.11  0.040 / 0.070
G27     302.1          33.7                6.3 +/-    1.31      10.2 +/-    1.31  0.040 / 0.040
G32     209.6          30.2                7.4 +/-    4.07      12.9 +/-    4.07  0.040 / 0.050