PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-19:42:20
G02     30.4           57.0                7.4 +/-    1.20       8.7 +/-    1.20  0.030 / 0.030
G05     140.7          61.3                9.9 +/-    0.41      11.1 +/-    0.41  0.030 / 0.050
G06     52.9           16.2                7.7 +/-    2.57      18.6 +/-    2.57  0.050 / 0.050
G12     202.9          70.2                8.3 +/-    0.25       8.7 +/-    0.25  0.080 / 0.060
G25     299.1          52.1                9.3 +/-    1.99      11.4 +/-    1.99  0.070 / 0.060
G29     306.7          27.8                8.5 +/-    1.82      15.5 +/-    1.82  0.050 / 0.050