PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-20:57:40
G01     122.0          15.8               14.5 +/-    1.74      35.5 +/-    1.74  0.030 / 0.050
G07     70.3           68.3               13.5 +/-    0.37      14.4 +/-    0.37  0.070 / 0.050
G08     48.3           38.6               11.7 +/-    0.72      17.4 +/-    0.72  0.150 / 0.280
G09     178.1          30.3               16.5 +/-    1.58      28.8 +/-    1.58  0.150 / 0.310
G11     113.9          38.3               15.1 +/-    1.33      22.7 +/-    1.33  0.030 / 0.030
G13     319.4          16.3               11.9 +/-    2.49      28.8 +/-    2.49  0.030 / 0.030
G17     202.2          17.7               18.1 +/-    0.82      42.1 +/-    0.82  0.090 / 0.210
G18     98.4           19.4               14.0 +/-    1.46      31.3 +/-    1.46  0.100 / 0.180
G28     287.4          56.3               12.4 +/-    2.00      14.5 +/-    2.00  0.030 / 0.030
G30     346.3          67.6               12.9 +/-    0.86      13.8 +/-    0.86  0.030 / 0.030