PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/28-22:13:10
G05     48.9           16.3                6.8 +/-    1.96      16.3 +/-    1.96  0.180 / 0.490
G10     236.4          14.5               13.6 +/-    2.30      34.3 +/-    2.30  0.200 / 0.530
G13     73.7           35.3                9.4 +/-    1.26      14.8 +/-    1.26  0.040 / 0.080
G15     122.7          53.0               11.7 +/-    0.55      14.2 +/-    0.55  0.050 / 0.070
G16     313.8          12.5                6.7 +/-    3.16      17.8 +/-    3.16  0.090 / 0.120
G20     249.0          37.3               12.1 +/-    1.87      18.5 +/-    1.87  0.090 / 0.120
G21     313.8          46.8               10.3 +/-    0.76      13.6 +/-    0.76  0.030 / 0.040
G25     199.5          11.2               13.1 +/-    1.99      35.6 +/-    1.99  0.030 / 0.040
G26     287.1          20.0                6.1 +/-    1.82      13.3 +/-    1.82  0.150 / 0.380
G29     153.2          71.1               10.2 +/-    1.19      10.7 +/-    1.19  0.160 / 0.480