PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-15:43:10
G01     320.1          14.5                5.0 +/-    2.36      12.6 +/-    2.36  0.170 / 0.280
G08     263.1          15.0                4.9 +/-    2.73      12.1 +/-    2.73  0.220 / 0.250
G10     72.8           55.8                6.7 +/-    0.39       7.9 +/-    0.39  0.060 / 0.060
G11     308.3          19.3                5.5 +/-    0.99      12.4 +/-    0.99  0.060 / 0.070
G14     282.1          68.5                7.8 +/-    0.59       8.3 +/-    0.59  0.030 / 0.040
G27     226.0          11.0                6.7 +/-    1.70      18.3 +/-    1.70  0.030 / 0.030
G31     176.7          37.9               10.4 +/-    1.18      15.7 +/-    1.18  0.030 / 0.040
G32     0.1            69.9                6.9 +/-    0.35       7.3 +/-    0.35  0.030 / 0.040