PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/08-12:57:50
G02     54.4           36.5                3.4 +/-    1.53       5.2 +/-    1.53  0.030 / 0.030
G05     74.5           67.4                4.4 +/-    0.38       4.7 +/-    0.38  0.030 / 0.020
G12     188.3          42.4                4.3 +/-    0.85       6.1 +/-    0.85  0.040 / 0.050
G13     135.3          9.8                -6.5 +/-    9.23     -18.3 +/-    9.23  0.040 / 0.050
G20     205.3          49.0                5.3 +/-    1.44       6.8 +/-    1.44  0.050 / 0.060
G21     266.6          16.8                4.0 +/-    4.53       9.4 +/-    4.53  0.040 / 0.060
G25     249.6          56.4                4.3 +/-    2.07       5.0 +/-    2.07  0.180 / 0.100
G29     326.4          51.4                3.0 +/-    1.19       3.7 +/-    1.19  0.170 / 0.680