PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-11:27:50
G05     46.8           22.1                1.3 +/-    1.02       2.7 +/-    1.02  0.050 / 0.130
G13     86.4           36.6                4.3 +/-    0.79       6.6 +/-    0.79  0.060 / 0.150
G15     131.6          47.4                6.5 +/-    0.61       8.5 +/-    0.61  0.050 / 0.080
G20     4.9            77.5                3.8 +/-    0.50       3.9 +/-    0.50  0.040 / 0.080
G21     308.6          45.0                3.5 +/-    0.99       4.8 +/-    0.99  0.080 / 0.210
G25     203.7          16.8                5.0 +/-    1.28      12.0 +/-    1.28  0.080 / 0.190
G26     295.7          20.1                5.3 +/-    1.78      11.7 +/-    1.78  0.040 / 0.050
G29     145.0          78.0                3.5 +/-    0.50       3.6 +/-    0.50  0.050 / 0.050