PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-23:28:00
G07     321.1          53.1                8.8 +/-    1.18      10.7 +/-    1.18  0.040 / 0.060
G08     114.7          48.6               12.6 +/-    0.44      16.1 +/-    0.44  0.050 / 0.070
G09     227.0          81.7                9.3 +/-    0.66       9.4 +/-    0.66  0.060 / 0.080
G16     44.2           15.4                6.2 +/-    2.07      15.2 +/-    2.07  0.040 / 0.080
G23     151.8          50.1               12.0 +/-    0.79      15.1 +/-    0.79  0.030 / 0.060
G27     63.1           34.7                8.3 +/-    0.57      13.3 +/-    0.57  0.040 / 0.060
G28     231.4          23.4               10.7 +/-    1.23      21.8 +/-    1.23  0.120 / 0.580
G30     297.2          32.7                7.6 +/-    1.20      12.6 +/-    1.20  0.120 / 0.490