PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-17:42:40
G07     38.6           69.8               13.2 +/-    1.36      14.0 +/-    1.36  0.050 / 0.050
G08     55.6           45.0               11.1 +/-    0.47      14.9 +/-    0.47  0.040 / 0.060
G09     178.9          40.6               15.3 +/-    2.23      22.0 +/-    2.23  0.050 / 0.040
G11     123.7          32.6               14.3 +/-    0.84      23.8 +/-    0.84  0.050 / 0.050
G18     107.9          14.5               15.4 +/-    1.70      38.7 +/-    1.70  0.050 / 0.080
G27     37.7           10.2                9.3 +/-    2.29      26.0 +/-    2.29  0.070 / 0.070
G28     270.4          50.9               13.0 +/-    1.05      16.2 +/-    1.05  0.080 / 0.140
G30     329.7          58.0               12.0 +/-    0.92      13.9 +/-    0.92  0.090 / 0.120