PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-13:42:40
G01     221.6          13.0                5.4 +/-    3.69      14.0 +/-    3.69  0.130 / 0.370
G14     91.6           20.0                8.1 +/-    1.74      17.8 +/-    1.74  0.120 / 0.260
G16     145.9          48.5               10.1 +/-    0.39      13.0 +/-    0.39  0.060 / 0.090
G22     196.1          62.4                8.4 +/-    1.26       9.4 +/-    1.26  0.050 / 0.090
G23     311.8          41.7                6.9 +/-    1.65       9.7 +/-    1.65  0.140 / 0.270
G26     90.9           55.6                8.3 +/-    1.49       9.8 +/-    1.49  0.130 / 0.190
G31     47.5           27.9                5.5 +/-    2.72      10.1 +/-    2.72  0.030 / 0.040