PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-12:58:00
G02     206.6          37.6                6.7 +/-    1.98      10.1 +/-    1.98  0.090 / 0.120
G06     141.7          75.6                6.7 +/-    0.47       6.9 +/-    0.47  0.060 / 0.140
G12     311.6          22.7                3.0 +/-    2.99       6.1 +/-    2.99  0.100 / 0.100
G17     43.1           43.1                4.4 +/-    0.83       6.1 +/-    0.83  0.080 / 0.080
G19     4.1            63.6                4.1 +/-    0.61       4.5 +/-    0.61  0.040 / 0.030
G24     287.4          42.3                3.9 +/-    0.86       5.5 +/-    0.86  0.030 / 0.030
G28     107.9          27.8                5.2 +/-    1.38       9.5 +/-    1.38  0.040 / 0.040