PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-03:12:30
G02     31.7           56.9                6.6 +/-    1.13       7.7 +/-    1.13  0.030 / 0.010
G05     141.3          59.8                8.5 +/-    0.39       9.6 +/-    0.39  0.030 / 0.010
G06     52.0           18.6                6.2 +/-    2.50      14.2 +/-    2.50  0.050 / 0.020
G12     206.0          71.7                7.6 +/-    0.36       8.0 +/-    0.36  0.040 / 0.010
G19     97.1           12.5                6.0 +/-    1.43      15.8 +/-    1.43  0.070 / 0.040
G25     302.4          50.3                5.9 +/-    4.10       7.4 +/-    4.10  0.040 / 0.020
G29     304.8          25.2                6.6 +/-    1.16      12.8 +/-    1.16  0.230 / 0.130