PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-23:12:30
G07     16.1           68.2               10.1 +/-    0.67      10.8 +/-    0.67  0.040 / 0.060
G08     64.9           49.7               10.6 +/-    0.58      13.5 +/-    0.58  0.040 / 0.050
G09     180.9          50.2               13.5 +/-    1.69      17.0 +/-    1.69  0.040 / 0.090
G11     132.6          26.8               12.9 +/-    0.89      24.1 +/-    0.89  0.040 / 0.080
G23     159.6          17.9               12.5 +/-    2.25      29.1 +/-    2.25  0.100 / 0.260
G27     40.0           16.1                8.7 +/-    1.82      21.1 +/-    1.82  0.100 / 0.270
G28     260.1          46.3               11.7 +/-    1.49      15.5 +/-    1.49  0.040 / 0.050
G30     325.1          54.5                9.5 +/-    0.84      11.3 +/-    0.84  0.040 / 0.050