PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-23:28:00
G07     307.7          46.7                7.9 +/-    1.06      10.3 +/-    1.06  0.220 / 0.620
G08     128.3          41.2               11.0 +/-    0.42      15.7 +/-    0.42  0.220 / 0.510
G09     302.1          78.4                6.1 +/-    0.92       6.2 +/-    0.92  0.100 / 0.220
G16     41.9           25.3                5.2 +/-    0.81      10.1 +/-    0.81  0.100 / 0.210
G23     144.7          62.4               10.0 +/-    0.84      11.2 +/-    0.84  0.050 / 0.070
G27     76.9           36.9                6.1 +/-    0.68       9.4 +/-    0.68  0.030 / 0.080
G28     224.7          14.0               10.0 +/-    3.70      25.4 +/-    3.70  0.040 / 0.080
G30     287.9          25.4                9.0 +/-    1.68      17.4 +/-    1.68  0.050 / 0.080