PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-21:43:10
G02     199.7          18.9               18.2 +/-    1.23      41.1 +/-    1.23  0.080 / 0.160
G06     174.1          49.0               14.2 +/-    1.38      18.1 +/-    1.38  0.080 / 0.160
G13     228.0          14.9               17.3 +/-    4.27      43.2 +/-    4.27  0.150 / 0.190
G17     20.0           61.2               13.9 +/-    0.56      15.6 +/-    0.56  0.180 / 0.210
G19     315.3          71.6               13.3 +/-    0.43      13.9 +/-    0.43  0.140 / 0.300
G24     310.7          28.8               13.1 +/-    1.36      23.6 +/-    1.36  0.120 / 0.340
G28     81.7           44.6               13.6 +/-    1.09      18.5 +/-    1.09  0.040 / 0.040
G30     156.3          15.2               15.5 +/-    0.86      38.5 +/-    0.86  0.030 / 0.040