PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-14:28:00
G01     122.5          14.3                9.8 +/-    2.22      24.8 +/-    2.22  0.100 / 0.110
G07     76.5           65.2                8.7 +/-    0.61       9.5 +/-    0.61  0.100 / 0.110
G08     48.1           37.3                7.7 +/-    0.90      11.8 +/-    0.90  0.050 / 0.100
G09     178.3          32.6                7.5 +/-    1.12      12.5 +/-    1.12  0.050 / 0.100
G11     112.6          38.5                9.1 +/-    1.19      13.5 +/-    1.19  0.030 / 0.030
G13     319.3          16.4                7.2 +/-    3.33      17.4 +/-    3.33  0.030 / 0.030
G17     200.6          17.7                8.5 +/-    2.37      19.8 +/-    2.37  0.180 / 0.440
G18     98.0           18.7                8.6 +/-    1.36      19.6 +/-    1.36  0.160 / 0.410
G28     276.7          51.0                8.8 +/-    3.06      10.9 +/-    3.06  0.190 / 0.250
G30     343.4          66.6                9.2 +/-    0.67      10.0 +/-    0.67  0.160 / 0.310