PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-15:12:40
G02     26.7           61.1                9.5 +/-    0.51      10.7 +/-    0.51  0.040 / 0.040
G05     153.8          54.1               13.4 +/-    0.68      16.1 +/-    0.68  0.030 / 0.050
G06     49.6           23.5                7.4 +/-    0.76      15.0 +/-    0.76  0.020 / 0.040
G12     218.1          75.4                8.5 +/-    0.96       8.8 +/-    0.96  0.030 / 0.040
G19     95.2           12.7               11.2 +/-    1.08      29.5 +/-    1.08  0.130 / 0.420
G20     198.1          18.9               11.8 +/-    2.25      26.6 +/-    2.25  0.140 / 0.370
G25     304.6          50.1                9.1 +/-    1.02      11.4 +/-    1.02  0.050 / 0.070
G29     304.9          27.5                6.8 +/-    1.26      12.6 +/-    1.26  0.060 / 0.070