PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-03:27:40
G10     293.9          50.6                9.4 +/-    0.61      11.8 +/-    0.61  0.070 / 0.040
G15     46.8           31.8                5.9 +/-    0.83       9.9 +/-    0.83  0.070 / 0.040
G20     336.8          64.8                8.5 +/-    0.46       9.3 +/-    0.46  0.050 / 0.090
G21     85.6           76.1                9.9 +/-    0.66      10.2 +/-    0.66  0.050 / 0.080
G24     99.2           25.5                7.0 +/-    0.80      13.5 +/-    0.80  0.040 / 0.050
G27     302.9          33.2                9.3 +/-    1.54      15.2 +/-    1.54  0.040 / 0.040
G29     168.6          10.5                9.1 +/-    1.50      25.1 +/-    1.50  0.160 / 0.290
G32     209.3          31.4               10.4 +/-    1.84      17.7 +/-    1.84  0.150 / 0.240