PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-04:13:00
G01     45.8           21.9                2.1 +/-    2.27       4.4 +/-    2.27  0.030 / 0.050
G06     179.1          28.3                6.2 +/-    2.06      11.3 +/-    2.06  0.040 / 0.050
G11     44.1           11.8                2.5 +/-    2.87       6.8 +/-    2.87  0.120 / 0.180
G13     245.8          27.0                5.6 +/-    2.00      10.4 +/-    2.00  0.100 / 0.210
G15     277.4          14.9                2.6 +/-    2.64       6.5 +/-    2.64  0.030 / 0.030
G17     337.9          76.1                4.1 +/-    0.42       4.2 +/-    0.42  0.030 / 0.030
G19     258.8          65.1                4.3 +/-    0.61       4.7 +/-    0.61  0.180 / 0.160
G24     318.7          11.9               -0.8 +/-   19.03      -2.2 +/-   19.03  0.130 / 0.220
G28     61.8           50.0                3.3 +/-    0.77       4.1 +/-    0.77  0.200 / 0.300
G30     151.1          32.1                6.1 +/-    1.04      10.3 +/-    1.04  0.250 / 0.390