PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-09:12:50
G01     94.8           29.5                5.3 +/-    1.60       9.4 +/-    1.60  0.040 / 0.050
G07     120.2          48.5                6.8 +/-    0.33       8.8 +/-    0.33  0.030 / 0.050
G08     41.9           14.2                3.3 +/-    3.01       8.4 +/-    3.01  0.050 / 0.060
G11     76.5           43.4                5.9 +/-    0.68       8.2 +/-    0.68  0.040 / 0.060
G13     299.7          35.2                4.9 +/-    1.20       7.7 +/-    1.20  0.170 / 0.210
G17     210.1          45.8                5.1 +/-    0.63       6.8 +/-    0.63  0.120 / 0.180
G18     68.8           24.5                5.5 +/-    1.14      10.8 +/-    1.14  0.100 / 0.370
G19     211.1          23.9                4.2 +/-    1.71       8.3 +/-    1.71  0.190 / 0.210
G28     322.5          60.2                3.6 +/-    0.64       4.1 +/-    0.64  0.030 / 0.020
G30     71.5           80.5                5.1 +/-    0.91       5.2 +/-    0.91  0.030 / 0.030