PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/15-10:42:30
G02     58.1           32.3                4.6 +/-    1.07       7.6 +/-    1.07  0.030 / 0.030
G05     65.3           65.4                6.5 +/-    0.41       7.0 +/-    0.41  0.030 / 0.020
G12     183.2          35.4                7.7 +/-    0.81      12.1 +/-    0.81  0.050 / 0.080
G13     129.2          12.5                7.3 +/-    2.05      19.2 +/-    2.05  0.050 / 0.100
G15     162.7          11.6                2.1 +/-   10.54       5.7 +/-   10.54  0.130 / 0.410
G21     269.3          15.9                2.2 +/-    2.81       5.4 +/-    2.81  0.190 / 0.430
G25     241.4          54.3                5.1 +/-    3.06       6.1 +/-    3.06  0.040 / 0.050
G29     325.6          50.2                4.7 +/-    1.00       5.9 +/-    1.00  0.030 / 0.050