PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-04:57:40
G02     218.2          65.5                6.1 +/-    0.82       6.7 +/-    0.82  0.230 / 0.390
G06     53.5           74.4                5.5 +/-    0.39       5.7 +/-    0.39  0.280 / 0.340
G12     319.1          37.4                3.2 +/-    1.66       4.9 +/-    1.66  0.050 / 0.060
G17     59.2           31.7                2.6 +/-    2.28       4.4 +/-    2.28  0.060 / 0.130
G19     43.4           46.9                4.0 +/-    0.71       5.2 +/-    0.71  0.040 / 0.020
G24     262.4          40.7                4.8 +/-    4.00       6.9 +/-    4.00  0.040 / 0.020
G28     124.9          10.7                8.2 +/-    1.73      22.6 +/-    1.73  0.080 / 0.070