PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-17:42:30
G07     9.0            66.2               12.0 +/-    0.69      13.0 +/-    0.69  0.070 / 0.150
G08     76.7           51.3               13.0 +/-    0.85      16.1 +/-    0.85  0.090 / 0.160
G09     183.6          61.6               14.8 +/-    1.72      16.6 +/-    1.72  0.030 / 0.050
G11     136.4          22.1               14.0 +/-    1.31      29.3 +/-    1.31  0.030 / 0.050
G23     158.7          29.3               13.4 +/-    1.68      23.9 +/-    1.68  0.060 / 0.090
G27     46.5           25.7               12.5 +/-    0.98      24.1 +/-    0.98  0.050 / 0.070
G28     245.9          34.7               14.3 +/-    1.32      22.8 +/-    1.32  0.050 / 0.040
G30     312.9          45.0               10.3 +/-    0.56      13.9 +/-    0.56  0.040 / 0.040