PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-14:27:30
G01     321.0          10.5              -18.6 +/-    5.95     -51.3 +/-    5.95  0.140 / 0.190
G08     268.3          17.0                5.6 +/-    1.84      13.4 +/-    1.84  0.120 / 0.330
G10     64.5           57.9                7.1 +/-    0.86       8.2 +/-    0.86  0.040 / 0.040
G11     312.1          16.1                3.4 +/-    2.12       8.3 +/-    2.12  0.040 / 0.040
G14     269.3          65.8                8.0 +/-    0.88       8.7 +/-    0.88  0.150 / 0.240
G21     154.3          11.5                8.1 +/-    3.28      21.8 +/-    3.28  0.130 / 0.280
G27     229.4          14.2                5.4 +/-    1.30      13.7 +/-    1.30  0.050 / 0.080
G31     177.3          33.2                8.1 +/-    1.95      13.4 +/-    1.95  0.050 / 0.080
G32     348.5          72.8                7.1 +/-    0.30       7.4 +/-    0.30  0.220 / 0.230