PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-10:57:30
G07     330.1          56.8                3.6 +/-    0.41       4.2 +/-    0.41  0.040 / 0.020
G08     104.1          49.8              -13.2 +/-   10.01     -16.7 +/-   10.01  0.030 / 0.020
G09     189.8          77.0                7.5 +/-    0.62       7.7 +/-    0.62  0.030 / 0.050
G11     146.8          10.0               -5.5 +/-    8.82     -15.4 +/-    8.82  0.030 / 0.030
G16     45.0           13.0                1.4 +/-    2.36       3.7 +/-    2.36  0.040 / 0.050
G23     153.9          48.9                6.1 +/-    0.67       7.9 +/-    0.67  0.040 / 0.050
G27     59.3           33.2                5.0 +/-    1.11       8.3 +/-    1.11  0.090 / 0.110
G28     233.7          25.7              -46.3 +/-   37.38     -88.9 +/-   37.38  0.130 / 0.110
G30     296.7          29.9                5.0 +/-    2.36       8.8 +/-    2.36  0.050 / 0.070