PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-16:58:00
G07     359.1          65.5               10.9 +/-    0.40      11.9 +/-    0.40  0.030 / 0.040
G08     75.7           52.6               10.9 +/-    0.94      13.4 +/-    0.94  0.040 / 0.040
G09     181.4          56.9               12.1 +/-    1.41      14.2 +/-    1.41  0.070 / 0.060
G11     136.2          22.9               11.4 +/-    1.49      23.4 +/-    1.49  0.060 / 0.060
G23     157.7          21.8               10.5 +/-    1.25      22.1 +/-    1.25  0.030 / 0.030
G27     43.4           21.7                9.9 +/-    0.84      21.0 +/-    0.84  0.030 / 0.040
G28     251.7          41.3               11.4 +/-    2.42      16.3 +/-    2.42  0.060 / 0.160
G30     315.3          46.5               10.0 +/-    0.65      13.2 +/-    0.65  0.040 / 0.110