PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-12:27:50
G07     331.0          57.2                4.1 +/-    0.84       4.8 +/-    0.84  0.030 / 0.020
G08     104.1          49.7              -12.9 +/-   13.01     -16.3 +/-   13.01  0.040 / 0.020
G09     193.9          77.8                5.7 +/-    0.50       5.8 +/-    0.50  0.110 / 0.120
G11     146.4          10.1               -3.9 +/-   13.93     -10.9 +/-   13.93  0.110 / 0.090
G16     45.1           12.3                3.4 +/-    2.22       9.0 +/-    2.22  0.030 / 0.040
G23     153.8          48.6                5.6 +/-    0.54       7.2 +/-    0.54  0.040 / 0.040
G27     59.3           33.2                5.6 +/-    1.35       9.1 +/-    1.35  0.040 / 0.050
G28     233.7          25.6              -44.0 +/-   50.97     -84.9 +/-   50.97  0.040 / 0.060
G30     296.6          29.7                3.3 +/-    2.49       5.9 +/-    2.49  0.060 / 0.070