PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-01:12:30
G02     308.4          81.6                8.5 +/-    0.63       8.6 +/-    0.63  0.050 / 0.120
G05     166.4          27.0               12.4 +/-    2.72      23.2 +/-    2.72  0.060 / 0.100
G06     38.9           50.7                8.6 +/-    0.86      10.8 +/-    0.86  0.110 / 0.200
G12     318.8          60.7                9.3 +/-    0.86      10.5 +/-    0.86  0.130 / 0.120
G17     80.3           14.7                8.0 +/-    2.03      20.0 +/-    2.03  0.190 / 0.150
G19     67.9           31.4                8.6 +/-    2.69      14.6 +/-    2.69  0.120 / 0.200
G24     232.8          27.3               10.9 +/-    1.65      20.2 +/-    1.65  0.030 / 0.030
G25     317.4          23.2                7.1 +/-    1.91      14.5 +/-    1.91  0.030 / 0.030