PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-21:57:40
G03     218.9          61.4                8.9 +/-    1.03      10.0 +/-    1.03  0.050 / 0.070
G07     255.0          14.0                7.9 +/-    2.38      20.2 +/-    2.38  0.050 / 0.070
G09     311.0          31.4                8.1 +/-    1.06      13.7 +/-    1.06  0.180 / 0.470
G14     106.1          11.0               10.1 +/-    2.24      27.4 +/-    2.24  0.290 / 0.480
G16     98.8           62.7                8.0 +/-    1.11       8.9 +/-    1.11  0.030 / 0.050
G22     191.5          44.7                8.2 +/-    0.64      11.1 +/-    0.64  0.030 / 0.050
G23     327.2          57.2                7.6 +/-    0.83       8.8 +/-    0.83  0.040 / 0.050
G26     56.5           45.2                5.6 +/-    0.89       7.5 +/-    0.89  0.050 / 0.030
G31     57.9           12.3                5.0 +/-    1.12      13.1 +/-    1.12  0.040 / 0.040