PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-19:42:50
G01     61.8           31.2               14.4 +/-    0.77      24.7 +/-    0.77  0.070 / 0.160
G07     141.6          24.2               17.3 +/-    1.66      34.4 +/-    1.66  0.070 / 0.170
G11     49.4           25.7               12.9 +/-    1.08      24.9 +/-    1.08  0.110 / 0.250
G13     264.6          35.7               16.3 +/-    1.54      25.5 +/-    1.54  0.090 / 0.340
G15     295.9          16.1               12.4 +/-    2.36      30.1 +/-    2.36  0.030 / 0.060
G17     248.9          72.4               16.1 +/-    0.48      16.8 +/-    0.48  0.030 / 0.060
G18     43.6           14.1               10.0 +/-    1.85      25.4 +/-    1.85  0.070 / 0.210
G19     230.9          47.7               16.1 +/-    1.16      20.9 +/-    1.16  0.070 / 0.210
G28     33.5           57.1               14.3 +/-    0.89      16.7 +/-    0.89  0.050 / 0.050
G30     142.4          53.1               16.9 +/-    1.64      20.6 +/-    1.64  0.050 / 0.060