PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-10:43:00
G08     271.4          17.6                5.5 +/-    2.11      12.8 +/-    2.11  0.040 / 0.040
G10     61.3           58.5                5.6 +/-    0.85       6.5 +/-    0.85  0.040 / 0.040
G11     312.6          15.8                2.9 +/-    2.00       7.1 +/-    2.00  0.160 / 0.190
G14     262.9          63.0                6.3 +/-    0.86       7.0 +/-    0.86  0.250 / 0.220
G18     312.6          31.0                5.1 +/-    1.68       8.8 +/-    1.68  0.140 / 0.300
G21     154.6          14.9                4.4 +/-    1.94      11.0 +/-    1.94  0.230 / 0.240
G24     39.6           9.9                 1.9 +/-    3.01       5.4 +/-    3.01  0.170 / 0.330
G27     231.1          15.5                5.7 +/-    2.16      14.1 +/-    2.16  0.180 / 0.340
G31     176.9          32.2                5.6 +/-    1.86       9.4 +/-    1.86  0.100 / 0.330
G32     345.7          73.6                7.6 +/-    0.38       7.9 +/-    0.38  0.080 / 0.360