PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-06:57:40
G10     297.2          51.6                5.5 +/-    0.61       6.8 +/-    0.61  0.060 / 0.080
G15     46.1           28.0                2.4 +/-    1.23       4.4 +/-    1.23  0.060 / 0.080
G20     43.6           53.9                4.8 +/-    0.54       5.8 +/-    0.54  0.070 / 0.150
G21     95.8           74.4                5.2 +/-    1.01       5.4 +/-    1.01  0.080 / 0.150
G24     97.4           26.5                6.8 +/-    1.03      12.8 +/-    1.03  0.040 / 0.040
G27     300.0          34.5                6.1 +/-    1.32       9.7 +/-    1.32  0.040 / 0.050
G32     210.3          33.7                8.0 +/-    2.26      13.1 +/-    2.26  0.040 / 0.050