PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-19:27:50
G01     71.9           33.1               11.1 +/-    1.15      18.2 +/-    1.15  0.070 / 0.110
G07     136.9          32.3               14.1 +/-    1.51      23.6 +/-    1.51  0.110 / 0.060
G11     54.9           32.1                9.7 +/-    1.20      16.3 +/-    1.20  0.020 / 0.040
G13     275.9          37.6               13.9 +/-    1.90      21.0 +/-    1.90  0.030 / 0.030
G15     303.9          14.8                6.9 +/-    1.46      17.2 +/-    1.46  0.110 / 0.230
G17     230.8          64.9               15.1 +/-    0.95      16.4 +/-    0.95  0.190 / 0.220
G18     50.1           18.9               10.6 +/-    2.04      23.9 +/-    2.04  0.040 / 0.040
G19     223.5          39.6               15.6 +/-    1.47      22.8 +/-    1.47  0.040 / 0.040
G28     18.3           59.4               11.9 +/-    1.28      13.6 +/-    1.28  0.060 / 0.090
G30     134.4          61.9               13.5 +/-    0.36      15.1 +/-    0.36  0.050 / 0.090