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 +/-    1.89      24.9 +/-    1.89  0.030 / 0.040
G07     76.5           65.2                9.3 +/-    0.33      10.2 +/-    0.33  0.030 / 0.050
G08     48.1           37.3                7.5 +/-    0.73      11.4 +/-    0.73  0.050 / 0.080
G09     178.3          32.6                9.7 +/-    1.17      16.2 +/-    1.17  0.050 / 0.080
G11     112.6          38.5                9.3 +/-    0.61      13.9 +/-    0.61  0.050 / 0.100
G13     319.3          16.4                5.6 +/-    2.22      13.5 +/-    2.22  0.040 / 0.090
G17     200.6          17.7                7.9 +/-    0.86      18.4 +/-    0.86  0.190 / 0.340
G18     98.0           18.7                8.7 +/-    1.27      19.8 +/-    1.27  0.170 / 0.330
G28     276.7          51.0                8.9 +/-    1.34      11.1 +/-    1.34  0.060 / 0.150
G30     343.4          66.6                7.4 +/-    0.68       8.0 +/-    0.68  0.100 / 0.190