PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/15-04:42:40
G02     39.3           49.6                3.4 +/-    1.48       4.4 +/-    1.48  0.040 / 0.040
G05     123.5          66.7                5.5 +/-    0.59       5.9 +/-    0.59  0.040 / 0.040
G06     55.4           15.6                2.5 +/-    1.95       6.1 +/-    1.95  0.030 / 0.030
G12     197.1          63.2                4.8 +/-    0.87       5.3 +/-    0.87  0.030 / 0.040
G25     283.7          58.2                6.1 +/-    1.64       7.0 +/-    1.64  0.030 / 0.040
G29     314.6          37.5                2.7 +/-    1.06       4.2 +/-    1.06  0.020 / 0.030