PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-17:57:50
G08     297.2          22.4               11.4 +/-    1.05      23.6 +/-    1.05  0.100 / 0.080
G10     358.0          62.7               10.2 +/-    0.50      11.3 +/-    0.50  0.060 / 0.100
G14     227.1          43.3               17.3 +/-    1.75      23.9 +/-    1.75  0.060 / 0.090
G18     60.8           51.7               10.2 +/-    0.93      12.6 +/-    0.93  0.050 / 0.080
G21     143.4          38.4               15.5 +/-    0.77      23.2 +/-    0.77  0.100 / 0.110
G24     60.5           27.8                7.9 +/-    2.28      14.6 +/-    2.28  0.100 / 0.110
G27     256.8          33.2               13.7 +/-    2.36      22.6 +/-    2.36  0.040 / 0.020
G32     239.3          63.8               14.7 +/-    0.86      16.2 +/-    0.86  0.020 / 0.040