PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-23:28:00
G02     328.6          80.5                9.5 +/-    0.45       9.6 +/-    0.45  0.030 / 0.040
G05     164.8          30.8               14.7 +/-    1.92      25.3 +/-    1.92  0.030 / 0.040
G06     41.0           42.7                8.5 +/-    0.36      11.8 +/-    0.36  0.060 / 0.090
G12     315.7          68.5                9.1 +/-    0.80       9.8 +/-    0.80  0.040 / 0.100
G17     82.2           15.8               10.5 +/-    1.94      25.6 +/-    1.94  0.080 / 0.160
G19     70.9           30.8               11.3 +/-    0.86      19.4 +/-    0.86  0.080 / 0.170
G24     230.8          25.1               13.9 +/-    1.55      27.0 +/-    1.55  0.030 / 0.040
G25     317.7          25.0                8.6 +/-    1.62      16.7 +/-    1.62  0.030 / 0.030