PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-12:27:50
G01     274.7          42.1                5.9 +/-    2.74       8.3 +/-    2.74  0.040 / 0.050
G03     315.9          31.2                5.3 +/-    1.13       9.0 +/-    1.13  0.050 / 0.050
G10     127.6          18.5                5.8 +/-    1.60      13.3 +/-    1.60  0.130 / 0.410
G11     252.4          21.0                7.6 +/-    2.62      16.3 +/-    2.62  0.120 / 0.390
G14     40.2           51.5                5.3 +/-    1.06       6.5 +/-    1.06  0.040 / 0.060
G18     234.5          40.9                8.6 +/-    1.69      12.4 +/-    1.69  0.050 / 0.050
G22     315.1          54.0                4.9 +/-    1.38       5.9 +/-    1.38  0.090 / 0.120
G25     54.8           16.8                4.1 +/-    2.53       9.9 +/-    2.53  0.120 / 0.130
G26     152.9          21.0                6.6 +/-    1.31      14.2 +/-    1.31  0.160 / 0.180
G31     68.8           77.7                6.2 +/-    0.38       6.3 +/-    0.38  0.110 / 0.150