PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-21:57:50
G05     48.3           17.7                7.6 +/-    1.79      17.6 +/-    1.79  0.130 / 0.420
G10     235.4          13.2               11.6 +/-    3.02      30.1 +/-    3.02  0.160 / 0.370
G13     75.8           35.4               11.0 +/-    1.45      17.3 +/-    1.45  0.220 / 0.480
G15     125.4          51.9               11.4 +/-    0.56      14.1 +/-    0.56  0.130 / 0.390
G16     315.1          11.9                7.6 +/-    6.53      20.3 +/-    6.53  0.050 / 0.070
G20     247.5          36.1               12.0 +/-    2.31      18.6 +/-    2.31  0.070 / 0.080
G21     312.2          45.7                9.3 +/-    0.73      12.4 +/-    0.73  0.090 / 0.110
G25     200.4          12.5               10.2 +/-    1.80      26.9 +/-    1.80  0.090 / 0.110
G26     288.7          20.1                6.0 +/-    1.66      13.2 +/-    1.66  0.030 / 0.040
G29     151.6          73.1               10.6 +/-    0.71      11.0 +/-    0.71  0.030 / 0.040