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               12.3 +/-    0.37      12.4 +/-    0.37  0.020 / 0.030
G05     165.0          30.3               18.6 +/-    1.02      32.4 +/-    1.02  0.030 / 0.030
G06     40.9           43.4               11.3 +/-    0.67      15.6 +/-    0.67  0.080 / 0.090
G12     316.4          67.7               13.4 +/-    0.40      14.4 +/-    0.40  0.070 / 0.080
G17     81.6           16.3               12.9 +/-    2.76      31.2 +/-    2.76  0.130 / 0.230
G19     70.3           31.1               13.0 +/-    0.74      22.2 +/-    0.74  0.140 / 0.230
G24     231.4          25.5               17.2 +/-    2.23      33.3 +/-    2.23  0.040 / 0.040
G25     317.7          24.4               11.5 +/-    1.67      22.7 +/-    1.67  0.050 / 0.050