PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-21:13:10
G03     188.9          19.1               12.1 +/-    1.36      27.1 +/-    1.36  0.040 / 0.080
G07     290.4          37.3               10.4 +/-    1.66      15.8 +/-    1.66  0.040 / 0.090
G08     143.4          27.5               13.9 +/-    0.74      25.7 +/-    0.74  0.060 / 0.150
G09     320.1          61.9               10.5 +/-    0.74      11.7 +/-    0.74  0.070 / 0.140
G16     42.8           39.4                9.6 +/-    1.24      14.2 +/-    1.24  0.050 / 0.090
G23     117.2          77.8                9.8 +/-    0.81      10.0 +/-    0.81  0.050 / 0.080
G26     43.5           11.0                9.2 +/-    3.63      25.3 +/-    3.63  0.090 / 0.320
G27     98.0           33.9               11.7 +/-    0.65      18.9 +/-    0.65  0.110 / 0.370
G30     275.5          16.5               12.4 +/-    2.18      29.7 +/-    2.18  0.030 / 0.050