PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-17:27:50
G01     49.4           25.0               11.1 +/-    2.26      21.7 +/-    2.26  0.110 / 0.360
G06     176.5          27.2               13.7 +/-    1.06      25.5 +/-    1.06  0.090 / 0.300
G07     146.6          11.9               13.6 +/-    3.00      36.4 +/-    3.00  0.070 / 0.080
G11     44.4           14.3               10.4 +/-    1.53      26.3 +/-    1.53  0.050 / 0.060
G13     249.5          29.9               13.6 +/-    1.18      23.8 +/-    1.18  0.130 / 0.210
G15     284.7          15.0                8.8 +/-    1.95      22.0 +/-    1.95  0.310 / 0.260
G17     313.2          78.2               13.4 +/-    0.38      13.7 +/-    0.38  0.030 / 0.020
G19     246.5          58.1               14.6 +/-    0.75      16.8 +/-    0.75  0.030 / 0.020
G28     53.8           52.6               12.9 +/-    1.59      15.8 +/-    1.59  0.050 / 0.050
G30     150.3          40.8               14.5 +/-    1.10      20.8 +/-    1.10  0.040 / 0.050