PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-14:57:50
G02     62.9           29.5                5.6 +/-    0.78       9.9 +/-    0.78  0.030 / 0.040
G05     54.8           61.0                6.9 +/-    0.78       7.8 +/-    0.78  0.030 / 0.060
G12     181.7          26.9                6.9 +/-    2.41      12.9 +/-    2.41  0.080 / 0.270
G13     123.1          17.7                9.0 +/-    2.45      21.0 +/-    2.45  0.130 / 0.210
G15     160.4          16.5                9.1 +/-    2.93      21.8 +/-    2.93  0.050 / 0.110
G21     275.0          19.4                5.6 +/-    1.10      12.6 +/-    1.10  0.060 / 0.100
G25     231.7          49.1                9.2 +/-    2.50      11.8 +/-    2.50  0.050 / 0.070
G29     330.9          57.7                4.2 +/-    0.84       4.9 +/-    0.84  0.040 / 0.080