PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-00:42:30
G07     359.0          65.3                4.6 +/-    0.71       5.0 +/-    0.71  0.050 / 0.140
G08     74.9           51.9                5.2 +/-    0.59       6.4 +/-    0.59  0.050 / 0.150
G09     182.7          58.4                7.7 +/-    0.46       8.9 +/-    0.46  0.030 / 0.030
G11     137.3          22.0                5.0 +/-    1.55      10.5 +/-    1.55  0.050 / 0.030
G23     159.0          26.1                5.1 +/-    1.58       9.6 +/-    1.58  0.040 / 0.040
G27     43.5           21.6                4.1 +/-    1.59       8.7 +/-    1.59  0.030 / 0.040
G28     251.5          41.3                5.7 +/-    2.27       8.1 +/-    2.27  0.150 / 0.210
G30     316.9          48.2                4.3 +/-    0.95       5.6 +/-    0.95  0.080 / 0.250