PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-21:12:30
G02     22.8           63.1                8.6 +/-    0.94       9.6 +/-    0.94  0.040 / 0.050
G05     152.6          55.6               11.4 +/-    0.62      13.5 +/-    0.62  0.050 / 0.050
G06     51.4           19.5                7.3 +/-    2.38      16.2 +/-    2.38  0.050 / 0.050
G12     204.3          72.4               10.1 +/-    0.30      10.5 +/-    0.30  0.040 / 0.060
G19     96.8           11.3                9.3 +/-    2.56      25.3 +/-    2.56  0.040 / 0.030
G20     197.2          22.4               15.3 +/-    1.74      31.7 +/-    1.74  0.030 / 0.030
G25     300.0          54.1                8.5 +/-    1.80      10.2 +/-    1.80  0.030 / 0.060
G29     304.3          25.4                7.9 +/-    0.60      15.3 +/-    0.60  0.030 / 0.040