PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-19:43:10
G01     69.9           32.9               12.5 +/-    1.20      20.6 +/-    1.20  0.080 / 0.220
G07     137.9          30.7               15.4 +/-    1.34      26.6 +/-    1.34  0.080 / 0.240
G11     53.7           31.0               11.6 +/-    1.20      19.9 +/-    1.20  0.030 / 0.030
G13     273.7          37.4               14.8 +/-    2.91      22.5 +/-    2.91  0.030 / 0.040
G15     302.3          15.2               10.3 +/-    1.70      25.4 +/-    1.70  0.070 / 0.080
G17     233.5          66.3               16.7 +/-    0.91      18.1 +/-    0.91  0.050 / 0.080
G18     48.7           18.1               11.9 +/-    2.38      27.4 +/-    2.38  0.120 / 0.230
G19     224.8          41.3               17.4 +/-    1.81      24.8 +/-    1.81  0.130 / 0.200
G28     21.4           59.0               14.5 +/-    1.54      16.6 +/-    1.54  0.040 / 0.040
G30     136.3          60.1               17.2 +/-    0.52      19.5 +/-    0.52  0.040 / 0.040