PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-20:28:00
G02     316.7          80.7                7.6 +/-    0.65       7.7 +/-    0.65  0.150 / 0.190
G05     165.8          29.2               12.6 +/-    0.58      22.4 +/-    0.58  0.130 / 0.190
G06     40.1           45.2                7.9 +/-    0.93      10.6 +/-    0.93  0.040 / 0.030
G12     317.4          64.0                8.8 +/-    0.80       9.7 +/-    0.80  0.030 / 0.030
G17     81.1           15.4                8.0 +/-    3.03      19.6 +/-    3.03  0.250 / 0.170
G19     70.8           29.0                8.8 +/-    1.22      15.8 +/-    1.22  0.200 / 0.260
G24     232.2          25.8               12.3 +/-    2.06      23.6 +/-    2.06  0.030 / 0.040
G25     317.4          23.9                7.0 +/-    1.56      13.9 +/-    1.56  0.030 / 0.040