PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-11:27:30
G10     301.8          53.6                4.8 +/-    0.92       5.8 +/-    0.92  0.030 / 0.040
G14     210.4          14.7                2.5 +/-    2.42       6.2 +/-    2.42  0.030 / 0.040
G15     45.7           25.4                4.3 +/-    2.06       8.3 +/-    2.06  0.180 / 0.350
G20     358.9          65.1                5.4 +/-    0.52       5.9 +/-    0.52  0.230 / 0.440
G21     109.2          67.9                6.4 +/-    0.78       6.9 +/-    0.78  0.090 / 0.050
G24     92.3           27.0                5.5 +/-    1.16      10.3 +/-    1.16  0.060 / 0.040
G27     300.2          33.7                3.4 +/-    1.73       5.6 +/-    1.73  0.140 / 0.190
G32     212.0          31.1                3.4 +/-    2.67       5.8 +/-    2.67  0.170 / 0.260