PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/27-20:57:40
G01     129.3          9.9               -12.0 +/-   36.80     -33.5 +/-   36.80  0.040 / 0.050
G07     42.4           69.8               13.3 +/-    0.52      14.1 +/-    0.52  0.040 / 0.060
G08     55.6           45.5               11.4 +/-    0.85      15.3 +/-    0.85  0.070 / 0.080
G09     179.3          40.0               16.1 +/-    1.25      23.4 +/-    1.25  0.070 / 0.070
G11     124.0          33.0               15.4 +/-    0.64      25.4 +/-    0.64  0.120 / 0.100
G18     107.0          15.1               15.1 +/-    1.50      37.4 +/-    1.50  0.130 / 0.090
G28     272.6          51.8               13.3 +/-    2.76      16.4 +/-    2.76  0.140 / 0.350
G30     333.4          60.3               10.7 +/-    0.49      12.1 +/-    0.49  0.280 / 0.360