PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-23:28:00
G02     304.8          81.6               10.9 +/-    1.16      11.0 +/-    1.16  0.100 / 0.160
G05     166.4          27.3               15.4 +/-    0.31      28.6 +/-    0.31  0.110 / 0.170
G06     40.4           46.3                9.1 +/-    0.61      12.1 +/-    0.61  0.020 / 0.040
G12     318.8          64.6               10.7 +/-    1.51      11.7 +/-    1.51  0.030 / 0.040
G17     79.1           18.0                9.7 +/-    1.17      22.3 +/-    1.17  0.050 / 0.110
G19     67.3           33.0               10.3 +/-    0.61      16.9 +/-    0.61  0.060 / 0.100
G24     233.9          27.6               16.2 +/-    1.90      29.8 +/-    1.90  0.030 / 0.040
G25     317.8          21.7                7.1 +/-    2.16      14.9 +/-    2.16  0.030 / 0.030