PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/07-20:42:50
G10     268.0          38.1               23.1 +/-    2.17      34.7 +/-    2.17  0.040 / 0.040
G13     42.0           18.9               17.8 +/-    1.42      40.3 +/-    1.42  0.040 / 0.050
G15     57.9           47.7               20.7 +/-    0.48      26.9 +/-    0.48  0.170 / 0.570
G16     282.4          10.8               20.6 +/-    2.15      56.4 +/-    2.15  0.120 / 0.580
G18     304.2          65.0               21.6 +/-    0.92      23.5 +/-    0.92  0.140 / 0.300
G20     55.2           34.1               18.8 +/-    0.96      30.4 +/-    0.96  0.130 / 0.250
G21     12.6           73.4               24.4 +/-    0.99      25.3 +/-    0.99  0.120 / 0.310
G24     120.6          14.6               24.6 +/-    2.13      61.9 +/-    2.13  0.100 / 0.210
G27     317.3          21.1               17.2 +/-    5.21      36.8 +/-    5.21  0.050 / 0.130
G29     166.0          25.3               23.2 +/-    0.84      45.1 +/-    0.84  0.050 / 0.120