PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-15:12:50
G10     283.1          46.7                4.3 +/-    1.05       5.6 +/-    1.05  0.050 / 0.050
G15     49.6           38.6                3.0 +/-    0.61       4.5 +/-    0.61  0.050 / 0.040
G20     327.0          64.7                3.1 +/-    0.65       3.4 +/-    0.65  0.090 / 0.180
G21     65.7           75.6                5.7 +/-    0.77       5.9 +/-    0.77  0.100 / 0.190
G24     104.1          21.7                8.0 +/-    0.89      16.8 +/-    0.89  0.040 / 0.050
G27     312.2          26.5                4.6 +/-    1.04       8.6 +/-    1.04  0.040 / 0.060
G29     167.5          16.1                4.9 +/-    2.18      11.9 +/-    2.18  0.090 / 0.120
G32     207.1          20.7                6.0 +/-    0.82      12.9 +/-    0.82  0.090 / 0.130