PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-17:12:30
G02     40.1           49.8               19.4 +/-    1.38      24.5 +/-    1.38  0.050 / 0.040
G05     132.5          67.2               23.8 +/-    0.84      25.6 +/-    0.84  0.040 / 0.050
G06     58.1           11.3               16.0 +/-    3.17      43.5 +/-    3.17  0.030 / 0.050
G12     193.5          59.2               26.3 +/-    1.13      30.1 +/-    1.13  0.030 / 0.040
G20     199.6          34.5               30.8 +/-    1.21      49.3 +/-    1.21  0.030 / 0.020
G25     278.9          59.0               21.4 +/-    0.55      24.6 +/-    0.55  0.030 / 0.030
G29     315.2          38.0               23.9 +/-    0.77      35.9 +/-    0.77  0.080 / 0.110