PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-19:12:30
G02     14.6           67.7                7.0 +/-    1.31       7.5 +/-    1.31  0.030 / 0.030
G05     155.8          48.4               10.0 +/-    1.17      12.8 +/-    1.17  0.030 / 0.030
G06     46.4           26.8                7.6 +/-    2.15      14.2 +/-    2.15  0.050 / 0.100
G12     255.9          79.5                7.0 +/-    1.01       7.1 +/-    1.01  0.050 / 0.080
G19     88.4           16.9                7.7 +/-    1.52      18.3 +/-    1.52  0.100 / 0.220
G24     218.2          12.5               10.7 +/-    3.36      28.1 +/-    3.36  0.130 / 0.180
G25     311.8          41.4                7.7 +/-    1.11      10.9 +/-    1.11  0.040 / 0.050
G29     297.0          18.6                8.8 +/-    1.93      20.0 +/-    1.93  0.040 / 0.040