PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-21:57:40
G02     73.9           22.4                8.4 +/-    1.14      17.4 +/-    1.14  0.060 / 0.370
G05     45.6           47.6                9.3 +/-    0.72      12.1 +/-    0.72  0.050 / 0.300
G12     180.6          12.9               15.2 +/-    2.15      39.9 +/-    2.15  0.080 / 0.110
G13     113.1          27.8               12.5 +/-    0.99      22.9 +/-    0.99  0.100 / 0.140
G15     154.4          27.0               13.8 +/-    2.25      25.8 +/-    2.25  0.080 / 0.190
G18     224.9          16.7               14.3 +/-    2.05      34.0 +/-    2.05  0.070 / 0.200
G20     234.0          82.4               11.0 +/-    0.66      11.1 +/-    0.66  0.020 / 0.040
G21     286.9          29.1               11.1 +/-    3.03      19.8 +/-    3.03  0.020 / 0.030
G25     211.4          33.5               13.7 +/-    2.45      22.4 +/-    2.45  0.030 / 0.080
G29     347.9          76.4               11.1 +/-    0.82      11.4 +/-    0.82  0.030 / 0.050