PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-07:27:40
G02     240.8          77.4                5.9 +/-    0.16       6.0 +/-    0.16  0.160 / 0.260
G05     173.4          13.5                4.4 +/-    4.14      11.3 +/-    4.14  0.170 / 0.230
G06     40.9           60.2                5.2 +/-    0.53       5.8 +/-    0.53  0.030 / 0.040
G12     321.6          51.6                3.5 +/-    0.81       4.4 +/-    0.81  0.040 / 0.040
G17     69.3           22.4                2.9 +/-    1.33       6.0 +/-    1.33  0.040 / 0.030
G19     56.3           37.8                4.0 +/-    1.67       6.0 +/-    1.67  0.040 / 0.030
G24     248.7          35.6                6.3 +/-    2.01      10.0 +/-    2.01  0.280 / 0.410
G25     315.7          10.9              -12.6 +/-   24.58     -34.5 +/-   24.58  0.240 / 0.430
G28     129.5          10.5                6.8 +/-    2.63      18.8 +/-    2.63  0.030 / 0.030