PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-20:58:10
G02     199.8          18.8               20.8 +/-    1.14      47.2 +/-    1.14  0.050 / 0.080
G06     173.5          49.4               16.5 +/-    1.33      21.0 +/-    1.33  0.050 / 0.070
G13     227.9          14.9               17.8 +/-    3.38      44.4 +/-    3.38  0.090 / 0.270
G17     19.4           61.5               14.8 +/-    0.55      16.6 +/-    0.55  0.090 / 0.260
G19     315.9          71.6               15.0 +/-    0.42      15.7 +/-    0.42  0.070 / 0.170
G24     310.8          28.6               13.3 +/-    1.28      23.9 +/-    1.28  0.080 / 0.150
G28     81.6           44.7               15.5 +/-    1.28      21.0 +/-    1.28  0.050 / 0.060
G30     156.1          14.8               19.1 +/-    2.37      47.7 +/-    2.37  0.040 / 0.060