PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/22-09:58:00
G10     258.5          33.5                4.5 +/-    1.72       7.3 +/-    1.72  0.060 / 0.040
G13     46.5           23.9                4.9 +/-    2.48       9.8 +/-    2.48  0.040 / 0.030
G15     69.6           53.8                5.5 +/-    0.65       6.7 +/-    0.65  0.060 / 0.120
G16     291.9          13.4                3.0 +/-    1.53       7.7 +/-    1.53  0.090 / 0.260
G20     283.1          56.3                4.6 +/-    2.44       5.4 +/-    2.44  0.060 / 0.080
G21     357.0          68.7                5.0 +/-    1.30       5.4 +/-    1.30  0.070 / 0.090
G24     125.1          9.6               -15.5 +/-   16.53     -43.5 +/-   16.53  0.120 / 0.330
G26     265.6          11.7                6.3 +/-    1.19      17.0 +/-    1.19  0.120 / 0.240
G29     163.9          36.1                6.1 +/-    0.88       9.4 +/-    0.88  0.200 / 0.300