PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-16:58:10
G01     49.7           25.0                9.9 +/-    2.23      19.3 +/-    2.23  0.040 / 0.070
G06     177.7          24.0               14.9 +/-    3.80      29.8 +/-    3.80  0.040 / 0.050
G11     44.5           15.3                9.8 +/-    2.60      24.2 +/-    2.60  0.150 / 0.290
G13     249.6          31.2               12.2 +/-    2.42      20.9 +/-    2.42  0.170 / 0.430
G15     283.4          15.8               13.6 +/-    0.65      33.1 +/-    0.65  0.070 / 0.170
G17     302.7          78.6               13.9 +/-    0.56      14.2 +/-    0.56  0.130 / 0.150
G19     245.8          60.8               14.4 +/-    0.66      16.2 +/-    0.66  0.030 / 0.020
G28     43.9           56.3               13.2 +/-    1.00      15.6 +/-    1.00  0.030 / 0.010
G30     148.9          39.1               14.0 +/-    0.68      20.7 +/-    0.68  0.040 / 0.050