PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-01:13:10
G02     56.4           35.2               10.5 +/-    1.54      16.5 +/-    1.54  0.060 / 0.060
G05     63.9           63.4               12.1 +/-    0.50      13.4 +/-    0.50  0.070 / 0.060
G12     184.9          36.5               14.7 +/-    1.41      22.7 +/-    1.41  0.200 / 0.270
G13     131.6          12.3               16.3 +/-    2.02      43.2 +/-    2.02  0.090 / 0.370
G21     267.7          14.1               13.6 +/-    2.03      34.5 +/-    2.03  0.030 / 0.030
G25     244.7          54.6               11.9 +/-    1.19      14.2 +/-    1.19  0.030 / 0.030
G29     324.9          49.6               12.5 +/-    0.88      15.8 +/-    0.88  0.210 / 0.400