PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/23-04:12:20
G02     40.4           48.7                3.5 +/-    1.28       4.5 +/-    1.28  0.050 / 0.040
G05     120.0          67.3                5.3 +/-    0.68       5.7 +/-    0.68  0.040 / 0.040
G06     56.3           14.3                2.0 +/-    1.35       5.1 +/-    1.35  0.030 / 0.030
G12     196.1          61.9                6.0 +/-    0.91       6.7 +/-    0.91  0.030 / 0.030
G25     281.6          58.4                8.7 +/-    0.80      10.0 +/-    0.80  0.020 / 0.030
G29     315.8          38.9                2.8 +/-    0.95       4.1 +/-    0.95  0.040 / 0.030