PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-12:58:00
G01     321.1          10.5              -16.2 +/-   20.22     -44.6 +/-   20.22  0.040 / 0.040
G08     269.3          16.9                6.0 +/-    1.27      14.2 +/-    1.27  0.040 / 0.050
G10     64.6           57.8                4.3 +/-    0.85       5.0 +/-    0.85  0.170 / 0.210
G11     311.9          16.3                2.2 +/-    3.09       5.4 +/-    3.09  0.120 / 0.310
G14     268.2          65.2                6.0 +/-    0.51       6.5 +/-    0.51  0.050 / 0.090
G21     154.6          12.3                4.8 +/-    1.68      12.9 +/-    1.68  0.050 / 0.080
G27     229.6          14.2                5.7 +/-    1.94      14.5 +/-    1.94  0.150 / 0.290
G31     176.9          33.7                5.9 +/-    1.30       9.6 +/-    1.30  0.240 / 0.260
G32     349.8          72.6                4.2 +/-    0.64       4.4 +/-    0.64  0.210 / 0.290