PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-10:27:40
G01     321.0          11.0              -10.8 +/-   29.88     -29.5 +/-   29.88  0.050 / 0.070
G08     268.8          16.7                4.7 +/-    2.56      11.2 +/-    2.56  0.040 / 0.070
G10     65.9           57.4                3.2 +/-    0.35       3.7 +/-    0.35  0.260 / 0.260
G11     310.9          17.5                3.0 +/-    2.26       7.1 +/-    2.26  0.270 / 0.380
G14     267.7          64.4                2.6 +/-    0.88       2.8 +/-    0.88  0.190 / 0.420
G18     311.3          33.1                3.8 +/-    2.35       6.3 +/-    2.35  0.250 / 0.380
G21     155.0          12.6                3.0 +/-    1.54       8.0 +/-    1.54  0.120 / 0.250
G27     229.3          13.9                4.3 +/-   11.65      11.0 +/-   11.65  0.110 / 0.260
G31     176.3          34.9                5.3 +/-    1.08       8.4 +/-    1.08  0.030 / 0.040
G32     353.1          72.1                3.8 +/-    0.63       4.0 +/-    0.63  0.030 / 0.040