PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-04:57:30
G02     33.3           55.6                3.9 +/-    0.83       4.6 +/-    0.83  0.030 / 0.030
G05     139.5          60.8                7.5 +/-    0.73       8.5 +/-    0.73  0.030 / 0.030
G06     52.4           18.5                2.4 +/-    2.75       5.4 +/-    2.75  0.110 / 0.700
G12     205.4          70.8                5.8 +/-    0.52       6.1 +/-    0.52  0.130 / 0.550
G19     98.3           11.4                4.8 +/-    2.07      13.0 +/-    2.07  0.340 / 0.170
G20     203.3          12.8                3.0 +/-    3.84       7.8 +/-    3.84  0.150 / 0.240
G25     300.9          51.2                3.5 +/-    1.82       4.4 +/-    1.82  0.030 / 0.030
G29     306.0          26.7                3.4 +/-    1.75       6.4 +/-    1.75  0.030 / 0.040