PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-06:58:00
G01     95.3           30.4                7.4 +/-    1.22      12.8 +/-    1.22  0.040 / 0.050
G07     121.2          48.4                7.3 +/-    0.98       9.4 +/-    0.98  0.030 / 0.040
G08     42.0           10.4                3.1 +/-    2.52       8.5 +/-    2.52  0.030 / 0.050
G11     74.3           40.7                4.8 +/-    1.24       6.9 +/-    1.24  0.030 / 0.050
G13     300.9          33.3                1.8 +/-    1.06       3.0 +/-    1.06  0.030 / 0.040
G17     211.3          50.7                6.1 +/-    0.63       7.6 +/-    0.63  0.030 / 0.050
G19     212.6          24.3                5.2 +/-    1.76      10.4 +/-    1.76  0.140 / 0.210
G28     341.7          61.8                3.1 +/-    0.63       3.4 +/-    0.63  0.120 / 0.410
G30     86.4           77.9                4.5 +/-    0.52       4.6 +/-    0.52  0.060 / 0.080