PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-22:58:10
G02     49.8           41.1                9.4 +/-    0.95      13.4 +/-    0.95  0.060 / 0.070
G05     81.9           68.2               11.0 +/-    0.37      11.7 +/-    0.37  0.050 / 0.080
G12     185.3          43.4               13.3 +/-    0.93      18.3 +/-    0.93  0.030 / 0.030
G25     257.7          57.7               12.5 +/-    1.36      14.4 +/-    1.36  0.030 / 0.030
G29     320.1          42.9               11.8 +/-    1.01      16.4 +/-    1.01  0.040 / 0.060