PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-10:57:50
G02     70.5           22.1                4.7 +/-    2.98       9.7 +/-    2.98  0.040 / 0.040
G05     47.4           51.1                4.1 +/-    0.53       5.1 +/-    0.53  0.030 / 0.040
G12     180.6          19.6                5.5 +/-    1.50      12.3 +/-    1.50  0.100 / 0.160
G13     116.1          22.7                8.9 +/-    0.93      18.3 +/-    0.93  0.100 / 0.150
G15     153.6          24.4                5.8 +/-    4.04      11.5 +/-    4.04  0.070 / 0.180
G20     224.9          11.5               -6.6 +/-    9.07     -17.8 +/-    9.07  0.090 / 0.200
G21     282.5          25.6                4.0 +/-    1.75       7.7 +/-    1.75  0.030 / 0.030
G25     221.3          42.3                4.8 +/-    2.14       6.8 +/-    2.14  0.030 / 0.030
G29     336.6          65.6                5.6 +/-    0.64       6.1 +/-    0.64  0.070 / 0.110