PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-23:42:50
G02     247.7          77.9               11.4 +/-    0.63      11.6 +/-    0.63  0.040 / 0.050
G05     170.2          18.3               16.8 +/-    2.01      38.5 +/-    2.01  0.060 / 0.050
G06     40.4           56.2               11.6 +/-    0.70      13.7 +/-    0.70  0.050 / 0.220
G12     321.6          54.0               11.7 +/-    1.15      14.1 +/-    1.15  0.070 / 0.230
G17     70.7           24.2               11.6 +/-    0.57      23.1 +/-    0.57  0.030 / 0.030
G19     57.7           38.8               11.1 +/-    0.36      16.5 +/-    0.36  0.040 / 0.040
G24     243.4          33.9               15.6 +/-    1.34      25.3 +/-    1.34  0.130 / 0.330
G25     316.9          12.9                8.4 +/-    2.18      21.9 +/-    2.18  0.120 / 0.260