PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-23:42:40
G02     325.9          80.8               11.7 +/-    0.61      11.8 +/-    0.61  0.070 / 0.170
G05     165.0          30.3               18.6 +/-    1.52      32.4 +/-    1.52  0.090 / 0.170
G06     40.9           43.4               11.0 +/-    0.38      15.2 +/-    0.38  0.030 / 0.040
G12     316.4          67.7               11.1 +/-    1.46      11.9 +/-    1.46  0.020 / 0.040
G17     81.6           16.3               12.4 +/-    0.64      29.8 +/-    0.64  0.060 / 0.090
G19     70.3           31.1               13.0 +/-    0.60      22.3 +/-    0.60  0.050 / 0.090
G24     231.4          25.5               18.0 +/-    1.43      34.7 +/-    1.43  0.030 / 0.030
G25     317.7          24.4               10.2 +/-    2.11      20.2 +/-    2.11  0.030 / 0.030