PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-16:57:30
G02     31.8           56.2                7.6 +/-    1.38       9.0 +/-    1.38  0.040 / 0.030
G05     139.3          64.1                8.7 +/-    0.48       9.6 +/-    0.48  0.040 / 0.030
G06     55.9           12.3                7.1 +/-    1.51      18.9 +/-    1.51  0.030 / 0.020
G12     189.7          61.7                9.4 +/-    0.46      10.5 +/-    0.46  0.020 / 0.030
G19     101.1          11.5                9.5 +/-    2.66      25.7 +/-    2.66  0.030 / 0.050
G25     288.8          57.1                6.6 +/-    3.01       7.8 +/-    3.01  0.050 / 0.040
G29     309.3          29.7                6.9 +/-    1.03      12.2 +/-    1.03  0.140 / 0.160