PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-03:27:30
G03     239.0          67.1                5.5 +/-    1.10       6.0 +/-    1.10  0.050 / 0.050
G09     304.8          20.5                5.0 +/-    2.93      10.9 +/-    2.93  0.050 / 0.060
G14     101.7          12.1                4.4 +/-    2.44      11.7 +/-    2.44  0.160 / 0.250
G16     133.6          59.6                7.0 +/-    0.88       8.0 +/-    0.88  0.130 / 0.240
G22     195.1          54.6                6.2 +/-    0.76       7.5 +/-    0.76  0.080 / 0.160
G23     319.4          49.0                3.4 +/-    0.93       4.3 +/-    0.93  0.080 / 0.160
G26     72.6           54.7                3.0 +/-    0.52       3.5 +/-    0.52  0.030 / 0.050
G31     51.7           22.1                1.1 +/-    1.00       2.4 +/-    1.00  0.040 / 0.040