PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-22:27:30
G02     202.4          33.3               13.4 +/-    2.34      22.0 +/-    2.34  0.050 / 0.110
G06     167.3          65.0               12.8 +/-    0.77      13.9 +/-    0.77  0.040 / 0.110
G12     305.3          11.6                5.2 +/-   17.13      13.9 +/-   17.13  0.080 / 0.100
G17     34.8           49.9                8.5 +/-    0.40      10.7 +/-    0.40  0.090 / 0.090
G19     357.5          66.3                8.3 +/-    0.72       9.0 +/-    0.72  0.130 / 0.300
G24     298.7          37.9                9.8 +/-    1.33      14.8 +/-    1.33  0.130 / 0.400
G28     98.2           36.1               10.8 +/-    0.85      16.7 +/-    0.85  0.040 / 0.040