PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-06:13:10
G02     254.4          80.0                2.4 +/-    0.23       2.5 +/-    0.23  0.120 / 0.140
G05     170.1          19.0                4.2 +/-    1.68       9.6 +/-    1.68  0.100 / 0.150
G06     39.6           59.0                3.3 +/-    0.44       3.8 +/-    0.44  0.060 / 0.110
G12     321.1          52.9                2.2 +/-    0.59       2.7 +/-    0.59  0.090 / 0.120
G17     72.8           21.7                1.6 +/-    1.10       3.4 +/-    1.10  0.040 / 0.030
G19     60.2           36.7                2.2 +/-    0.93       3.4 +/-    0.93  0.030 / 0.030
G24     243.7          33.5                6.6 +/-    2.42      10.8 +/-    2.42  0.030 / 0.040
G25     317.1          13.9                2.5 +/-    2.78       6.3 +/-    2.78  0.040 / 0.040