PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-20:12:50
G01     122.0          15.8               14.3 +/-    1.87      35.0 +/-    1.87  0.040 / 0.050
G07     70.2           68.3               13.6 +/-    0.37      14.5 +/-    0.37  0.060 / 0.050
G08     48.2           38.4               10.9 +/-    1.02      16.2 +/-    1.02  0.150 / 0.280
G09     178.0          30.2               16.9 +/-    2.32      29.5 +/-    2.32  0.160 / 0.280
G11     113.5          38.3               16.6 +/-    1.28      24.8 +/-    1.28  0.030 / 0.030
G13     319.3          16.3               11.8 +/-    1.87      28.4 +/-    1.87  0.030 / 0.030
G17     202.4          17.1               21.7 +/-    3.60      51.3 +/-    3.60  0.090 / 0.170
G18     98.3           19.5               12.6 +/-    1.27      28.0 +/-    1.27  0.120 / 0.210
G28     287.3          56.2               13.1 +/-    2.01      15.4 +/-    2.01  0.030 / 0.030
G30     345.4          67.3               13.2 +/-    0.61      14.2 +/-    0.61  0.030 / 0.030