PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-22:28:00
G07     354.3          64.4               11.3 +/-    0.59      12.3 +/-    0.59  0.090 / 0.090
G08     80.1           53.3               11.2 +/-    0.93      13.6 +/-    0.93  0.050 / 0.110
G09     183.6          60.6               14.5 +/-    0.67      16.4 +/-    0.67  0.070 / 0.110
G11     139.8          20.5               18.0 +/-    1.52      39.2 +/-    1.52  0.120 / 0.130
G23     158.3          26.9               14.8 +/-    1.49      27.7 +/-    1.49  0.060 / 0.040
G27     44.6           23.1                8.5 +/-    2.11      17.4 +/-    2.11  0.040 / 0.040
G28     249.4          39.9               12.9 +/-    1.48      18.7 +/-    1.48  0.040 / 0.040
G30     315.7          47.4               11.2 +/-    0.79      14.7 +/-    0.79  0.030 / 0.040