PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/30-19:57:50
G07     347.9          62.8               15.2 +/-    0.57      16.8 +/-    0.57  0.050 / 0.050
G08     88.8           54.5               14.4 +/-    1.69      17.2 +/-    1.69  0.040 / 0.040
G09     184.8          63.9               14.4 +/-    0.45      15.8 +/-    0.45  0.080 / 0.150
G11     141.4          18.7               14.7 +/-    1.94      33.5 +/-    1.94  0.090 / 0.120
G23     157.1          28.4               14.2 +/-    0.88      25.6 +/-    0.88  0.030 / 0.040
G27     46.7           25.4               12.8 +/-    1.94      24.7 +/-    1.94  0.030 / 0.040
G28     246.1          37.5               15.5 +/-    1.76      23.5 +/-    1.76  0.070 / 0.060
G30     311.7          43.8               14.2 +/-    0.86      19.5 +/-    0.86  0.080 / 0.060