PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-19:27:50
G02     83.9           13.5               15.8 +/-    1.67      40.8 +/-    1.67  0.120 / 0.380
G05     44.6           36.2               15.7 +/-    0.57      24.4 +/-    0.57  0.120 / 0.310
G13     100.6          33.8               17.9 +/-    0.80      29.1 +/-    0.80  0.060 / 0.110
G15     144.5          38.1               20.1 +/-    0.96      30.1 +/-    0.96  0.050 / 0.130
G18     231.5          27.8               17.9 +/-    1.59      32.9 +/-    1.59  0.040 / 0.040
G20     349.7          83.6               16.4 +/-    0.37      16.5 +/-    0.37  0.040 / 0.050
G21     297.7          37.2               18.2 +/-    1.52      27.7 +/-    1.52  0.110 / 0.240
G25     206.4          24.0               16.2 +/-    3.57      32.3 +/-    3.57  0.110 / 0.220
G26     308.6          16.3               15.2 +/-    2.65      36.7 +/-    2.65  0.040 / 0.110
G29     90.1           85.5               17.5 +/-    0.77      17.6 +/-    0.77  0.040 / 0.080