PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-10:28:00
G10     248.6          24.5                5.7 +/-    0.81      11.2 +/-    0.81  0.130 / 0.420
G13     56.4           31.8                4.5 +/-    1.65       7.5 +/-    1.65  0.110 / 0.370
G15     88.6           56.9                6.8 +/-    0.79       7.9 +/-    0.79  0.050 / 0.040
G16     299.3          14.9                1.1 +/-    1.75       2.8 +/-    1.75  0.040 / 0.040
G20     35.6           56.4                5.8 +/-    0.82       6.8 +/-    0.82  0.030 / 0.040
G21     333.5          60.0                4.3 +/-    0.52       4.8 +/-    0.52  0.030 / 0.040
G26     270.1          16.5                4.9 +/-    1.82      11.7 +/-    1.82  0.080 / 0.100
G29     163.4          51.1                8.8 +/-    0.52      10.9 +/-    0.52  0.050 / 0.120