PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/25-13:57:50
G02     56.6           34.6                5.8 +/-    1.07       9.3 +/-    1.07  0.020 / 0.020
G05     68.2           66.0                5.6 +/-    0.44       6.1 +/-    0.44  0.020 / 0.020
G12     187.4          39.0                6.7 +/-    0.91       9.9 +/-    0.91  0.180 / 0.210
G13     133.2          11.8                9.2 +/-    1.75      24.8 +/-    1.75  0.150 / 0.210
G20     206.3          52.8                6.6 +/-    0.66       8.0 +/-    0.66  0.030 / 0.040
G21     268.8          18.1                4.4 +/-    1.06      10.1 +/-    1.06  0.040 / 0.040
G25     243.5          54.8                5.3 +/-    1.46       6.3 +/-    1.46  0.040 / 0.060
G29     329.2          54.8                3.5 +/-    0.88       4.1 +/-    0.88  0.040 / 0.060