PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-05:58:00
G10     271.9          40.8                7.1 +/-    1.14      10.2 +/-    1.14  0.120 / 0.120
G13     40.2           15.1                4.0 +/-    3.18       9.9 +/-    3.18  0.130 / 0.200
G15     54.9           45.2                5.5 +/-    0.68       7.4 +/-    0.68  0.040 / 0.040
G20     5.4            66.2                4.4 +/-    0.61       4.7 +/-    0.61  0.040 / 0.030
G21     14.1           74.3                6.9 +/-    0.69       7.1 +/-    0.69  0.100 / 0.170
G24     116.4          16.8                6.4 +/-    0.99      15.2 +/-    0.99  0.100 / 0.200
G27     316.2          22.6                4.3 +/-    1.50       8.9 +/-    1.50  0.230 / 0.280
G29     168.6          27.0                5.6 +/-    1.42      10.5 +/-    1.42  0.230 / 0.410
G32     204.6          14.7                4.7 +/-    2.03      11.9 +/-    2.03  0.030 / 0.030