PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-08:43:00
G02     299.1          81.3                2.9 +/-    0.94       2.9 +/-    0.94  0.080 / 0.130
G05     168.6          25.3                4.0 +/-    1.76       7.7 +/-    1.76  0.100 / 0.150
G06     39.4           49.5                1.8 +/-    0.80       2.3 +/-    0.80  0.040 / 0.030
G12     319.0          62.4                1.8 +/-    0.66       2.0 +/-    0.66  0.040 / 0.040
G17     81.0           13.5                4.0 +/-    1.61      10.2 +/-    1.61  0.030 / 0.040
G19     66.5           33.4                3.1 +/-    0.64       5.1 +/-    0.64  0.020 / 0.040
G24     230.0          26.9                5.7 +/-    1.73      10.7 +/-    1.73  0.070 / 0.180
G25     317.3          27.6                0.7 +/-    1.04       1.4 +/-    1.04  0.070 / 0.140