PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-20:42:50
G10     266.8          38.3                8.9 +/-    1.27      13.3 +/-    1.27  0.040 / 0.040
G13     41.9           18.2                7.9 +/-    4.03      18.1 +/-    4.03  0.050 / 0.040
G15     63.6           53.5                8.7 +/-    0.68      10.6 +/-    0.68  0.240 / 0.480
G16     278.7          12.3                9.0 +/-    1.81      23.8 +/-    1.81  0.250 / 0.470
G20     297.1          60.2                7.6 +/-    0.99       8.7 +/-    0.99  0.170 / 0.190
G21     2.8            71.7                9.1 +/-    0.58       9.6 +/-    0.58  0.150 / 0.130
G24     118.1          14.4               11.0 +/-    2.28      27.7 +/-    2.28  0.140 / 0.310
G27     319.3          17.7                7.8 +/-    1.80      18.2 +/-    1.80  0.130 / 0.320
G29     168.0          31.9                9.6 +/-    1.68      16.2 +/-    1.68  0.160 / 0.260