PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-22:27:50
G02     204.1          39.1               15.8 +/-    0.84      23.3 +/-    0.84  0.140 / 0.320
G06     160.5          71.1               14.3 +/-    0.49      15.0 +/-    0.49  0.120 / 0.300
G12     308.3          15.7                9.3 +/-    2.08      22.6 +/-    2.08  0.080 / 0.070
G17     39.7           45.9               12.1 +/-    0.64      16.1 +/-    0.64  0.070 / 0.090
G19     9.1            62.9               13.1 +/-    0.46      14.5 +/-    0.46  0.040 / 0.040
G24     292.4          40.3               17.3 +/-    7.45      25.0 +/-    7.45  0.040 / 0.040
G28     103.7          32.6               13.2 +/-    1.26      21.9 +/-    1.26  0.060 / 0.140