PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-01:28:10
G02     304.8          82.0                9.2 +/-    0.65       9.3 +/-    0.65  0.040 / 0.040
G05     166.4          26.7               13.5 +/-    1.92      25.4 +/-    1.92  0.020 / 0.040
G06     40.1           47.8                8.9 +/-    0.93      11.6 +/-    0.93  0.040 / 0.120
G12     319.2          62.7                9.7 +/-    0.86      10.8 +/-    0.86  0.040 / 0.130
G17     77.8           19.9                7.9 +/-    0.90      17.5 +/-    0.90  0.030 / 0.040
G19     67.0           32.9                8.9 +/-    0.97      14.6 +/-    0.97  0.030 / 0.030
G24     235.1          28.2               12.7 +/-    1.69      23.0 +/-    1.69  0.110 / 0.340
G25     317.8          20.7                8.7 +/-    2.01      18.8 +/-    2.01  0.120 / 0.270