PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-17:43:10
G02     83.7           13.1               14.2 +/-    0.79      36.9 +/-    0.79  0.040 / 0.080
G05     44.6           35.6               11.7 +/-    0.85      18.3 +/-    0.85  0.040 / 0.080
G13     101.3          33.4               14.8 +/-    0.94      24.2 +/-    0.94  0.110 / 0.370
G15     144.4          37.7               16.7 +/-    0.76      25.3 +/-    0.76  0.110 / 0.500
G18     231.1          27.7               14.6 +/-    2.13      26.8 +/-    2.13  0.100 / 0.150
G20     335.7          84.4               12.9 +/-    0.63      12.9 +/-    0.63  0.100 / 0.180
G21     297.7          37.6               14.0 +/-    1.56      21.2 +/-    1.56  0.050 / 0.080
G25     207.7          25.2               15.1 +/-    0.89      29.4 +/-    0.89  0.040 / 0.070
G26     310.3          15.3                8.2 +/-    5.17      20.2 +/-    5.17  0.070 / 0.130
G29     92.5           84.7               12.6 +/-    0.76      12.7 +/-    0.76  0.060 / 0.130