PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-00:58:10
G05     51.3           13.3                9.5 +/-    1.12      24.6 +/-    1.12  0.120 / 0.200
G10     241.4          17.1               14.1 +/-    1.32      33.2 +/-    1.32  0.080 / 0.240
G13     67.4           36.2               11.4 +/-    0.89      17.7 +/-    0.89  0.030 / 0.050
G15     116.4          56.2               14.4 +/-    0.81      17.0 +/-    0.81  0.030 / 0.040
G16     308.4          13.7                9.4 +/-    1.97      24.0 +/-    1.97  0.040 / 0.050
G18     252.6          46.4               12.9 +/-    0.92      17.0 +/-    0.92  0.040 / 0.070
G20     35.7           57.7               11.3 +/-    0.38      13.1 +/-    0.38  0.080 / 0.240
G21     319.8          51.9               11.8 +/-    1.34      14.5 +/-    1.34  0.080 / 0.270
G26     281.0          19.1                8.6 +/-    1.79      19.3 +/-    1.79  0.050 / 0.150
G29     160.1          61.7               14.4 +/-    1.03      16.1 +/-    1.03  0.060 / 0.150