PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-04:57:50
G02     225.4          71.0                4.2 +/-    0.52       4.4 +/-    0.52  0.150 / 0.250
G05     174.0          10.3               -7.8 +/-    9.28     -21.7 +/-    9.28  0.040 / 0.030
G06     45.0           68.8                3.5 +/-    0.34       3.8 +/-    0.34  0.030 / 0.020
G12     320.4          42.8                2.8 +/-    0.54       3.9 +/-    0.54  0.050 / 0.100
G17     63.9           28.4                2.2 +/-    1.17       3.9 +/-    1.17  0.060 / 0.100
G19     49.5           43.3                3.3 +/-    1.12       4.6 +/-    1.12  0.050 / 0.050
G24     255.2          38.7                3.9 +/-    1.35       5.7 +/-    1.35  0.040 / 0.040