PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/15-13:43:10
G02     36.6           52.7                6.7 +/-    1.64       8.1 +/-    1.64  0.020 / 0.020
G05     138.4          63.6                9.3 +/-    0.62      10.2 +/-    0.62  0.020 / 0.020
G06     54.2           17.4                4.9 +/-    3.86      11.4 +/-    3.86  0.210 / 0.190
G12     199.8          66.1                7.7 +/-    0.65       8.3 +/-    0.65  0.230 / 0.230
G20     199.4          27.4               10.2 +/-    2.01      18.9 +/-    2.01  0.020 / 0.020
G25     292.1          55.6                5.4 +/-    5.36       6.4 +/-    5.36  0.030 / 0.030
G29     311.9          34.7                4.6 +/-    1.56       7.4 +/-    1.56  0.040 / 0.040