PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-01:42:50
G01     121.0          16.6                5.4 +/-    1.51      12.9 +/-    1.51  0.040 / 0.050
G07     74.6           67.5                3.7 +/-    0.47       4.0 +/-    0.47  0.030 / 0.050
G08     46.3           34.4                2.8 +/-    0.50       4.5 +/-    0.50  0.060 / 0.140
G09     178.0          29.1                5.9 +/-    3.23      10.5 +/-    3.23  0.050 / 0.110
G11     111.9          38.6                5.8 +/-    1.14       8.7 +/-    1.14  0.030 / 0.030
G13     319.1          16.8                0.5 +/-    1.33       1.1 +/-    1.33  0.030 / 0.040
G17     201.4          22.1                6.4 +/-    0.94      13.4 +/-    0.94  0.040 / 0.070
G28     290.0          56.9                3.9 +/-    0.76       4.6 +/-    0.76  0.040 / 0.070
G30     350.9          69.1                2.2 +/-    0.81       2.3 +/-    0.81  0.120 / 0.110