PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-09:28:00
G02     309.8          81.0                3.5 +/-    0.61       3.5 +/-    0.61  0.030 / 0.040
G05     168.2          26.8                6.6 +/-    1.15      12.3 +/-    1.15  0.040 / 0.040
G06     39.8           47.2                2.2 +/-    0.70       2.8 +/-    0.70  0.170 / 0.170
G12     317.9          64.7                2.7 +/-    0.52       3.0 +/-    0.52  0.190 / 0.220
G17     82.4           12.4                3.8 +/-    3.41      10.1 +/-    3.41  0.110 / 0.140
G19     68.1           32.5                3.5 +/-    1.63       5.9 +/-    1.63  0.140 / 0.150
G24     228.2          25.5                3.9 +/-    2.50       7.5 +/-    2.50  0.030 / 0.040
G25     317.1          29.7                3.5 +/-    1.59       6.2 +/-    1.59  0.030 / 0.030